Total-nutrient low-GI goat milk powder suitable for middle-aged and elderly people as well as preparation method and application of total-nutrient low-GI goat milk powder

Abstract

The invention relates to the technical field of middle-aged and elderly goat milk powder and preparation methods thereof, in particular to total-nutrient low-GI goat milk powder suitable for middle-aged and elderly people and a preparation method and application thereof.The total-nutrient low-GI goat milk powder comprises, by weight, 20-60 parts of raw goat milk, 10-30 parts of demineralized whey powder and 10-30 parts of skimmed milk powder. The formula comprises the following components in parts by weight: 5-20 parts of stachyose composite prebiotics powder, 5-20 parts of powdered oil, 20-30 parts of enzymolysis germinated cereal powder, 5-20 parts of polydextrose, 2-15 parts of whey protein powder (hydrolysis type), 2-15 parts of malt flour, 2-15 parts of whey protein powder (rich in milk fat globule membranes), 0.1-5 parts of taurine, 0.1-5 parts of composite vitamins and 0.1-5 parts of composite minerals. The provided full-nutrient low-GI goat milk powder has the characteristics of low GI, no goaty flavor, easiness in digestion, full nutrition and the like, and is suitable for middle-aged and elderly people.

Description

Technical Field

[0001] The invention relates to the technical field of goat milk powder, and in particular to a complete nutrition low GI goat milk powder suitable for middle-aged and elderly people, and a preparation method and application thereof. Background Art

[0002] The products in the middle-aged and elderly milk powder market are mainly high in calcium, low in fat, high in vitamins, rich in probiotics, high in iron and zinc, etc., focusing on solving the basic nutrition problems of the middle-aged and elderly population. The product homogeneity phenomenon is relatively serious, and the product formula is relatively single. The formula emphasizes the nutritional and health care effects of a single ingredient, but cannot really meet the diversified nutritional needs of the middle-aged and elderly population, and the product advantages are not outstanding. The glycemic index (GI), also known as the blood sugar index and the glycemic index, is a physiological parameter for evaluating food carbohydrates, which is used to measure the degree of postprandial blood sugar response caused by food. A low GI diet can reduce the risk of obesity, diabetes and cardiovascular disease. Low GI milk powder is a kind of low GI food, which not only contains rich protein, vitamins and minerals. At the same time, compared with ordinary milk powder, low GI milk powder digests more slowly and has a stronger sense of fullness. After consumption, the postprandial blood sugar and insulin levels react more steadily. A low GI diet can not only reduce the risk of diseases such as type II diabetes and gestational diabetes, cardiovascular disease, and obesity, but also play a role in weight loss and weight management, skin health, continuous energy supply, exercise endurance, prolonged satiety, lower cholesterol levels, and pregnancy management. However, there are few low GI milk powders on the market. Although some patented technologies have been used to try to solve the problems of low GI and no mutton smell, they still fail to fully meet the nutritional needs of the middle-aged and elderly groups and create a complete nutrition, low GI, and no mutton smell goat milk powder suitable for the middle-aged and elderly groups.

[0003] Chinese invention patent application CN114568521A discloses a low GI and easily digestible functional modulated goat milk powder and its preparation method, which compounds low-glycemic and hypoglycemic substances such as polypeptides and flavonoids into a functional composition, and uses goat milk powder as a base to enhance the digestion and absorption rate of functional substances in the human body and significantly reduce the glycemic index, thereby improving its efficacy, and mainly solves the problems of poor mixing uniformity, low absorption rate, and insignificant efficacy of functional modulated goat milk powder produced in existing formulas and technologies. However, it only makes technical breakthroughs from the aspects of product uniformity and hypoglycemic efficacy, and does not combine the nutritional needs of the middle-aged and elderly population to create a full-nutrition, low-GI, and non-smelly goat milk powder suitable for the middle-aged and elderly population.

[0004] Chinese invention patent application CN107251949A discloses a method for preparing a whole-fat goat milk powder without mutton smell that retains goat milk fatty acids. The invention utilizes the emulsifying effect of phospholipids and the antioxidant effect of ascorbic acid to protect goat milk fat, and utilizes the embedding effect of β-cyclodextrin to cover up the mutton smell without removing medium-chain fatty acids, thereby retaining the nutritional components of goat milk to the greatest extent. Whole-fat goat milk powder is calculated by mass components, and its raw materials include: 98.1-98.8 parts of fresh goat milk, 0.2-0.3 parts of phospholipids, 0.8-1.2 parts of β-cyclodextrin, 0.1-0.2 parts of ascorbic acid, and 0.1-0.2 parts of locust bean gum. Although this invention patent solves the problem of goat milk powder without mutton smell, it still does not have the characteristics of full nutrition, low GI, and mutton-free goat milk powder suitable for middle-aged and elderly people.

[0005] Therefore, there is an urgent need to provide a goat milk powder with low GI, no mutton smell, easy digestion, and complete nutrition suitable for middle-aged and elderly people. Summary of the invention

[0006] In view of the deficiencies of the prior art, the present invention provides a complete nutrition low GI goat milk powder suitable for the middle-aged and elderly population and a preparation method thereof. By screening the core raw materials of the GI-lowering goat milk powder and scientifically matching the functional factors of the same origin of medicine and food, a low GI, no smell, easy to digest, and complete nutrition goat milk powder suitable for the middle-aged and elderly population is obtained. The creation and industrialization of the low GI goat milk powder product promotes the solution to the prominent chronic disease problems of the middle-aged and elderly population, advocates scientific and healthy elderly life, and provides more accurate products for the middle-aged and elderly population.

[0007] The present invention is achieved through the following technical solutions:

[0008] One of the purposes of the present invention is to provide a complete nutrition low GI goat milk powder suitable for middle-aged and elderly people. The complete nutrition low GI goat milk powder comprises the following raw material components in parts by weight: 20-60 parts of raw goat milk, 10-30 parts of desalted whey powder, 10-30 parts of skim milk powder, 5-20 parts of stachyose composite prebiotic powder, 5-20 parts of powdered oil, 20-30 parts of enzymatically hydrolyzed germinated grain powder, 5-20 parts of polydextrose, 2-15 parts of whey protein powder (hydrolyzed type), 2-15 parts of malt powder, 2-15 parts of whey protein powder (rich in milk fat globule membrane), 0.1-5 parts of taurine, 0.1-5 parts of complex vitamins, and 0.1-5 parts of complex minerals;

[0009] The enzymatically hydrolyzed sprouted grain powder is obtained by crushing sprouted grains after enzymatic hydrolysis with a composite enzyme preparation, wherein the composite enzyme preparation comprises 1-2 parts of cellulase, 0.05-0.2 parts of papain and 0.1-0.5 parts of beta-amylase; the dosage of the composite enzyme preparation is 1-3wt.% of the sprouted grains; the enzymatic hydrolysis temperature is 35-40°C, and the enzymatic hydrolysis time is 1-2h.

[0010] Preferably, the complete nutrition low GI goat milk powder includes the following raw material components in parts by weight: 30-50 parts of raw goat milk, 15-25 parts of desalted whey powder, 15-25 parts of skimmed milk powder, 8-16 parts of stachyose composite prebiotic powder, 8-16 parts of powdered oil, 20-30 parts of enzymatically hydrolyzed germinated grain powder, 8-15 parts of polydextrose, 3-12 parts of whey protein powder (hydrolyzed type), 5-12 parts of malt powder, 3-12 parts of whey protein powder (rich in milk fat globule membrane), 0.1-3 parts of taurine, 0.1-3 parts of complex vitamins, and 0.1-3 parts of complex minerals.

[0011] Preferably, the complete nutrition low GI goat milk powder comprises the following raw material components in parts by weight: 40 parts of raw goat milk, 20 parts of desalted whey powder, 20 parts of skimmed milk powder, 12 parts of stachyose composite prebiotic powder, 12 parts of powdered oil, 25 parts of enzymatically hydrolyzed germinated grain powder, 12 parts of polydextrose, 8 parts of whey protein powder (hydrolyzed type), 10 parts of malt powder, 8 parts of whey protein powder (rich in milk fat globule membrane), 1 part of taurine, 1 part of complex vitamins, and 1 part of complex minerals.

[0012] Preferably, the stachyose composite prebiotic powder is composed of: stachyose, mulberry leaf extract, and white kidney bean extract, and the mass ratio of the three is 1-3:1:1.

[0013] Preferably, the mass ratio of the stachyose composite prebiotic powder, the enzymatically hydrolyzed germinated grain powder and the malt powder is 5-20:20-30:2-15.

[0014] Preferably, the complex minerals include minerals providing iron, calcium, zinc and magnesium.

[0015] Preferably, the vitamin complex includes vitamin A, vitamin D, vitamin E, vitamin K1, vitamin B1, vitamin B2, vitamin B6, vitamin B 12 , niacin, folic acid, pantothenic acid, vitamin C and biotin.

[0016] The second aspect of the present invention is to provide a preparation process of the above-mentioned complete nutrition low GI goat milk powder, which adopts a wet preparation process and comprises the following steps:

[0017] (1) filtering, purifying and sterilizing raw goat milk;

[0018] (2) Adding other raw materials into step (1) in proportion, wherein the composite minerals are dissolved in pure water at a temperature of 35-45° C. for 7-10 minutes before adding, and the composite vitamins are dissolved in pure water at a temperature of 35-45° C. for 3-5 minutes before adding;

[0019] (3) Homogenize, concentrate, evaporate and spray dry to obtain the product.

[0020] Preferably, the sterilization in step (1) is pasteurization, the sterilization temperature is 90-110° C., and the sterilization time is 15 minutes.

[0021] Preferably, in step (3), the homogenization pressure is 10-14 MPa, the vacuum degree of the concentrated evaporation is 220-260 mbar, and the steam pressure is ≥0.6 MPa; the inlet air temperature of the spray drying is 165-185°C, and the exhaust air temperature is 90-92°C.

[0022] The invention has the following beneficial effects: (1) the enzymatically hydrolyzed germinated grain powder prepared by a specific enzyme preparation as a specific component of a goat milk powder component can significantly reduce the GI value of the goat milk powder product; (2) the enzymatically hydrolyzed germinated grain powder, the stachyose composite prebiotic powder and the malt powder are compounded, and the GI value of the obtained low GI goat milk powder is all below 16, belonging to a low GI food; (3) the low GI goat milk powder of the invention has no mutton smell; (4) the low GI goat milk powder of the invention contains protein, fat, carbohydrates, vitamins and minerals, and has the characteristics of complete nutrition; (5) the low GI goat milk powder of the invention has the characteristics of high fiber. The goat milk powder provided by the invention has low GI, no mutton smell, is easy to digest and has complete nutrition, and is suitable for middle-aged and elderly people. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the odor fingerprint of goat milk powder;

[0024] Figure 2 This is the principal component analysis diagram of goat milk powder;

[0025] Figure 3 This is the result of the electronic tongue test on goat milk powder. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with specific embodiments, and the advantages and features of the present invention will become clearer as the description proceeds. However, these embodiments are exemplary only and do not constitute any limitation to the scope of the present invention. It should be understood by those skilled in the art that the details and forms of the technical solution of the present invention may be modified or replaced without departing from the spirit and scope of the present invention, but these modifications and replacements all fall within the scope of protection of the present invention.

[0027] Desalted whey powder (ML220 type), Tianjin Yinhe Weiye Import and Export Co., Ltd.;

[0028] Skim milk powder, Tianjin Yinhe Weiye Import and Export Co., Ltd.;

[0029] Stachyose compound prebiotic powder (special for formulating milk powder), China Food Fermentation Industry Research Institute Co., Ltd.;

[0030] Powdered oil, Tianjin Fuhaitai Technology Co., Ltd.;

[0031] Polydextrose, Bowling Biotechnology Co., Ltd.;

[0032] Whey protein powder (Hilmar8350), Tianjin Yinhe Weiye Import and Export Co., Ltd.;

[0033] Malt powder, Tianjin Fuhaitai Technology Co., Ltd.;

[0034] Whey protein powder (Hilmar7500), Tianjin Yinhe Weiye Import and Export Co., Ltd.;

[0035] Taurine, Henan Zongteng Food Ingredients Co., Ltd.;

[0036] Multivitamins (vitamin A acetate, vitamin D3, dl-α-tocopherol acetate, thiamine hydrochloride, riboflavin, pyridoxine hydrochloride, cyanocobalamin, sodium L-ascorbate, niacinamide, folic acid, D-calcium pantothenate);

[0037] Complex minerals (ferric pyrophosphate, calcium carbonate, zinc gluconate, magnesium carbonate).

[0038] The preparation process of the stachyose composite prebiotic powder in the following examples and comparative examples is as follows: first, a water extraction process is used to perform preliminary extraction from herbivorous silkworms, mulberry leaves, and white kidney beans, activated carbon adsorption is used for decolorization, acid precipitation and plate and frame filtration are used to remove protein, and then anion and cation exchange resins are used for purification, dual-effect concentration process is used for concentration, UHT sterilization is performed, and spray drying is performed to obtain the stachyose composite prebiotic powder.

[0039] Embodiment 1:

[0040] A complete nutrition low GI goat milk powder suitable for middle-aged and elderly people, comprising the following raw material components by weight: 40 parts of raw goat milk, 20 parts of desalted whey powder, 20 parts of skim milk powder, 12 parts of stachyose composite prebiotic powder, 12 parts of powdered oil, 25 parts of enzymatically hydrolyzed germinated grain powder, 12 parts of polydextrose, 8 parts of whey protein powder (hydrolyzed type), 10 parts of malt powder, 8 parts of whey protein powder (rich in milk fat globule membrane), 1 part of taurine, 1 part of complex vitamins, and 1 part of complex minerals;

[0041] The enzymatically hydrolyzed sprouted grain powder is prepared by mixing, enzymolyzing, inactivating enzymes, emulsifying, homogenizing, sterilizing and spray drying soybean flour, oat flour, sprouted brown rice flour and beer malt flour. The enzyme preparation used in the enzymatic hydrolysis process includes 1.5 parts of cellulase, 0.1 parts of papain and 0.4 parts of beta-amylase; the amount of the enzyme preparation is 2wt.% of the sprouted grain; the enzymatic hydrolysis temperature is 40°C and the enzymatic hydrolysis time is 1.5h.

[0042] Embodiment 2:

[0043] A complete nutrition low GI goat milk powder suitable for middle-aged and elderly people, comprising the following raw material components by weight: 30 parts of raw goat milk, 15 parts of desalted whey powder, 15 parts of skim milk powder, 8 parts of stachyose composite prebiotic powder, 8 parts of powdered oil, 20 parts of enzymatically hydrolyzed germinated grain powder, 8 parts of polydextrose, 3 parts of whey protein powder (hydrolyzed type), 5 parts of malt powder, 3 parts of whey protein powder (rich in milk fat globule membrane), 0.1 parts of taurine, 0.1 parts of complex vitamins, and 0.1 parts of complex minerals;

[0044] The enzymatically hydrolyzed sprouted grain powder is prepared by mixing, enzymolyzing, inactivating enzymes, emulsifying, homogenizing, sterilizing and spray drying soybean flour, oat flour, sprouted brown rice flour and beer malt flour. The enzyme preparation used in the enzymatic hydrolysis process includes 1 part of cellulase, 0.05 part of papain and 0.1 part of beta-amylase; the amount of the enzyme preparation is 1wt.% of the sprouted grain; the enzymatic hydrolysis temperature is 35°C and the enzymatic hydrolysis time is 1h.

[0045] Embodiment 3:

[0046] 50 parts of raw goat milk, 25 parts of desalted whey powder, 25 parts of skim milk powder, 16 parts of stachyose compound prebiotic powder, 16 parts of powdered oil, 30 parts of enzymatically hydrolyzed sprouted grain powder, 15 parts of polydextrose, 12 parts of whey protein powder (hydrolyzed type), 12 parts of malt powder, 12 parts of whey protein powder (rich in milk fat globule membrane), 3 parts of taurine, 3 parts of multivitamins, and 3 parts of multiminerals;

[0047] The enzymatically hydrolyzed sprouted grain powder is prepared by mixing, enzymolyzing, inactivating enzymes, emulsifying, homogenizing, sterilizing and spray drying soybean flour, oat flour, sprouted brown rice flour and beer malt flour. The enzyme preparation used in the enzymatic hydrolysis process includes 2 parts of cellulase, 0.2 parts of papain and 0.5 parts of beta-amylase; the amount of the composite enzyme preparation is 3wt.% of the sprouted grain; the enzymatic hydrolysis temperature is 40°C and the enzymatic hydrolysis time is 2h.

[0048] Comparative Example 1:

[0049] A complete nutrition low GI goat milk powder suitable for middle-aged and elderly people, comprising the following raw material components by weight: 40 parts of raw goat milk, 20 parts of desalted whey powder, 20 parts of skim milk powder, 12 parts of stachyose composite prebiotic powder, 12 parts of powdered oil, 25 parts of enzymatically hydrolyzed germinated grain powder, 12 parts of polydextrose, 8 parts of whey protein powder (hydrolyzed type), 10 parts of malt powder, 8 parts of whey protein powder (rich in milk fat globule membrane), 1 part of taurine, 1 part of complex vitamins, and 1 part of complex minerals;

[0050] The enzymatically hydrolyzed sprouted grain powder is prepared by mixing, enzymolyzing, inactivating enzymes, emulsifying, homogenizing, sterilizing and spray drying soybean flour, oat flour, sprouted brown rice flour and beer malt flour. The enzyme preparation used in the enzymatic hydrolysis process is cellulase, the amount of cellulase used is 2wt.% of the sprouted grain, the enzymatic hydrolysis temperature is 40°C and the enzymatic hydrolysis time is 1.5h.

[0051] The only difference between Comparative Example 1 and Example 1 is that the types of enzymes used in the preparation of enzymatically hydrolyzed sprouted grain powder are different. The enzymatically hydrolyzed sprouted grain powder in Comparative Example 1 is obtained by enzymatically hydrolyzing sprouted grains with a single enzyme, cellulase, while the enzymatically hydrolyzed sprouted grain powder in Example 1 is obtained by enzymatically hydrolyzing sprouted grains with a composite enzyme preparation composed of cellulase, papain and β-amylase.

[0052] Comparative Example 2:

[0053] A complete nutrition low GI goat milk powder suitable for middle-aged and elderly people, comprising the following raw material components by weight: 40 parts of raw goat milk, 20 parts of desalted whey powder, 20 parts of skim milk powder, 12 parts of stachyose composite prebiotic powder, 12 parts of powdered oil, 25 parts of enzymatically hydrolyzed germinated grain powder, 12 parts of polydextrose, 8 parts of whey protein powder (hydrolyzed type), 10 parts of malt powder, 8 parts of whey protein powder (rich in milk fat globule membrane), 1 part of taurine, 1 part of complex vitamins, and 1 part of complex minerals;

[0054] The enzymatically hydrolyzed sprouted grain powder is prepared by mixing, enzymolyzing, inactivating enzymes, emulsifying, homogenizing, sterilizing and spray drying soybean flour, oat flour, sprouted brown rice flour and beer malt flour. The enzyme preparation used in the enzymatic hydrolysis process includes 0.1 parts of papain and 0.4 parts of beta-amylase; the amount of the enzyme preparation is 2wt.% of the sprouted grain; the enzymatic hydrolysis temperature is 40°C and the enzymatic hydrolysis time is 1.5h.

[0055] The only difference between Comparative Example 2 and Example 1 is that the enzyme preparations used in the preparation of enzymatically hydrolyzed sprouted grain flour are different. The enzyme preparation in Comparative Example 2 consists of 0.1 parts of papain and 0.4 parts of β-amylase, while the enzyme preparation in Example 1 consists of 1.5 parts of cellulase, 0.1 parts of papain and 0.4 parts of β-amylase.

[0056] Comparative Example 3:

[0057] A complete nutrition low GI goat milk powder suitable for middle-aged and elderly people, comprising the following raw material components by weight: 40 parts of raw goat milk, 20 parts of desalted whey powder, 20 parts of skim milk powder, 25.6 parts of stachyose composite prebiotic powder, 12 parts of powdered oil, 12 parts of polydextrose, 8 parts of whey protein powder (hydrolyzed type), 21.4 parts of malt powder, 8 parts of whey protein powder (rich in milk fat globule membrane), 1 part of taurine, 1 part of complex vitamins, and 1 part of complex minerals;

[0058] The only difference from Example 1 is that there is no enzymatically hydrolyzed germinated grain powder in the raw material components, and the amount of the enzymatically hydrolyzed germinated grain powder is added to the stachyose composite prebiotic powder and the malt powder in proportion. The rest is the same as Example 1.

[0059] Comparative Example 4:

[0060] A complete nutrition low GI goat milk powder suitable for middle-aged and elderly people, comprising the following raw material components by weight: 40 parts of raw goat milk, 20 parts of desalted whey powder, 20 parts of skim milk powder, 12 parts of powdered oil, 47 parts of enzymatically hydrolyzed sprouted grain powder, 12 parts of polydextrose, 8 parts of whey protein powder (hydrolyzed type), 8 parts of whey protein powder (rich in milk fat globule membrane), 1 part of taurine, 1 part of complex vitamins, and 1 part of complex minerals;

[0061] The enzymatically hydrolyzed sprouted grain powder is prepared by mixing, enzymolyzing, inactivating enzymes, emulsifying, homogenizing, sterilizing and spray drying soybean flour, oat flour, sprouted brown rice flour and beer malt flour. The enzyme preparation used in the enzymatic hydrolysis process includes 1.5 parts of cellulase, 0.1 parts of papain and 0.4 parts of beta-amylase; the amount of the enzyme preparation is 2wt.% of the sprouted grain; the enzymatic hydrolysis temperature is 40°C and the enzymatic hydrolysis time is 1.5h.

[0062] The only difference from Example 1 is that the raw material components do not contain stachyose composite prebiotic powder and malt powder, and the amount of stachyose composite prebiotic powder and malt powder is added to the enzymatically hydrolyzed germinated grain powder. The rest is the same as Example 1.

[0063] Comparative Example 5:

[0064] A complete nutrition low GI goat milk powder suitable for middle-aged and elderly people, comprising the following raw material components by weight: 40 parts of raw goat milk, 20 parts of desalted whey powder, 20 parts of skim milk powder, 37 parts of stachyose composite prebiotic powder, 12 parts of powdered oil, 12 parts of polydextrose, 8 parts of whey protein powder (hydrolyzed type), 10 parts of malt powder, 8 parts of whey protein powder (rich in milk fat globule membrane), 1 part of taurine, 1 part of complex vitamins, and 1 part of complex minerals;

[0065] The difference from Example 1 is that there is no enzymatically hydrolyzed germinated grain powder in the raw material components, and the amount of the enzymatically hydrolyzed germinated grain powder is added to the stachyose composite prebiotic powder. The rest is the same as Example 1.

[0066] Comparative Example 6:

[0067] A complete nutrition low GI goat milk powder suitable for middle-aged and elderly people, comprising the following raw material components by weight: 40 parts of raw goat milk, 20 parts of desalted whey powder, 20 parts of skim milk powder, 12 parts of powdered oil, 37 parts of enzymatically hydrolyzed germinated grain powder, 12 parts of polydextrose, 8 parts of whey protein powder (hydrolyzed type), 10 parts of malt powder, 8 parts of whey protein powder (rich in milk fat globule membrane), 1 part of taurine, 1 part of complex vitamins, and 1 part of complex minerals;

[0068] The enzymatically hydrolyzed sprouted grain powder is prepared by mixing, enzymolyzing, inactivating enzymes, emulsifying, homogenizing, sterilizing and spray drying soybean flour, oat flour, sprouted brown rice flour and beer malt flour. The enzyme preparation used in the enzymatic hydrolysis process includes 1.5 parts of cellulase, 0.1 parts of papain and 0.4 parts of beta-amylase; the amount of the enzyme preparation is 2wt.% of the sprouted grain; the enzymatic hydrolysis temperature is 40°C and the enzymatic hydrolysis time is 1.5h.

[0069] The difference from Example 1 is that there is no stachyose composite prebiotic powder in the raw material components, and the amount of stachyose composite prebiotic powder is added to the enzymatically hydrolyzed sprouted grain powder. The rest is the same as Example 1.

[0070] Preparation Example

[0071] A preparation process of a complete nutrition low GI goat milk powder suitable for middle-aged and elderly people, comprising the following steps:

[0072] Step (1): Filter the raw goat milk to remove some of the mutton smell, and then remove the impurities in the fresh goat milk through a milk purifier. High-speed gravity separation removes dust, particles, milk mud and some somatic cells that are invisible to the naked eye. The fresh goat milk after milk purifying is pasteurized at a temperature of 100°C for 15 minutes, which can quickly eliminate bacteria and microorganisms without damaging the quality of the milk product.

[0073] Step (2): Add the other components into step (1) in proportion, wherein the composite minerals are dissolved in pure water at 40° C. for 10 minutes before adding, and the composite vitamins are dissolved in pure water at 40° C. for 5 minutes before adding;

[0074] Step (3): homogenization, the homogenization pressure is 12 MPa; concentration and evaporation, the vacuum degree is 2400 mbar, the steam pressure is 0.8 MPa; spray drying, the inlet air temperature is 170° C., and the exhaust air temperature is 92° C., to obtain the milk powder of the present invention.

[0075] Examples 1-3 of the present invention and comparative examples 1-6 were all prepared by the method of this preparation example.

[0076] Test Example 1:

[0077] The GI test of the product is carried out by selecting volunteers in strict accordance with ISO 26642:2010 and WS / T 652-2019 methods, calculating the consumption of 50g of available carbon water corresponding to the complete nutrition low GI goat milk powder suitable for the middle-aged and elderly people according to the nutritional composition table of complete nutrition low GI goat milk powder suitable for the middle-aged and elderly people, and providing 250mL of water to carry out human blood sugar measurement and food GI calculation. The GI calculation method is as follows:

[0078] (1) With time as the horizontal axis and blood glucose value at each time point as the vertical axis, a blood glucose response curve was prepared, and the area under the blood glucose curve was calculated. The GI value of the test food was calculated with the GI value of the glucose reference as 100 (the GI value of white bread is 71).

[0079] Food GI value = test food IAUC / glucose reference IAUC × 100

[0080] (2) Data processing requirements: In accordance with the ISO26642:2010 standard and combined with the testing experience of the Sydney Glycemic Index Research Service Center, the following requirements are set for food blood glucose measurement and GI calculation: When calculating the GI value, if the volunteer's calculated GI value exceeds the food GI value by ±2SD, the volunteer's data needs to be eliminated and the food GI value needs to be recalculated.

[0081] (3) Data analysis: The data were plotted in Excel and statistically analyzed. T-test was used to analyze the significance of differences. P < 0.05 indicated a significant difference, and P < 0.01 indicated an extremely significant difference.

[0082] (4) GI value test results of complete nutrition low GI goat milk powder suitable for middle-aged and elderly people

[0083] The blood glucose concentration and IAUC of each group of testers after taking glucose and complete nutrition low GI goat milk powder suitable for middle-aged and elderly people are shown in Table 1 and Table 2. The CV value of IAUC of glucose of each subject's reference food is ≤30%, which is within the effective range, and the GI value of the test food can be calculated. According to the calculation of GI value in the reference literature, the calculation results are shown in Table 3.

[0084] Table 1: Glucose test blood glucose concentration and IAUC value

[0085]

[0086]

[0087] Table 2: Blood glucose test concentration and IAUC value of each group after tasting complete nutrition low GI goat milk powder

[0088]

[0089] Table 3: Calculation results of GI values ​​of each group of tasting complete nutrition low GI goat milk powder

[0090]

[0091]

[0092] According to the above GI value measurement results, all the obtained goat milk powders are low GI value products, but when the enzymatically hydrolyzed germinated grain powder in the component is prepared by a specific enzyme preparation as a goat milk powder component, the GI value of the goat milk powder product can be significantly reduced. According to the difference in GI values ​​between Example 1 and Comparative Examples 1 and 2, it can be seen that when the amount of enzyme preparation added remains unchanged, changing the type of enzyme preparation directly affects the GI value of the final product. After the germinated grain powder is fermented with a specific enzyme preparation composed of 1-2 parts of cellulose, 0.05-0.2 parts of papain and 0.1-0.5 parts of β-amylase, the GI value of the goat milk powder product can be reduced; According to the comparison of the GI values ​​of Comparative Examples 3-6 and Example 1, when the total amount remains unchanged, the enzymatically hydrolyzed germinated grain powder, stachyose composite prebiotic powder and malt powder are compounded, and the GI values ​​of the obtained low GI goat milk powder are all below 16.

[0093] The complete nutrition low GI goat milk powder suitable for middle-aged and elderly people obtained by the invention has a GI value of 13-15 and is a low GI product.

[0094] Test Example 2: Results of the electronic nose test of complete nutrition low GI goat milk suitable for middle-aged and elderly people

[0095] In order to evaluate the difference between the smell of complete nutrition low GI goat milk suitable for middle-aged and elderly people and the products on the market, three products with high recognition among consumers on the market (goat milk powder A, goat milk powder B, goat milk powder C) were selected for comparative analysis with the created product (goat milk powder D). By comparing the odor intensity of 17 electronic nose sensors, it was found that (e.g. Figure 1 and Figure 2 ), goat milk powder D has a very similar smell to goat milk powder A. It has a big difference from goat milk powder B. Goat milk powder A is full-fat goat milk powder of Youshili Dairy, which retains the ingredients of natural goat milk and has a mellow taste. The goat milk powder created by the present invention not only has a taste similar to that of full-fat goat milk powder of Youshili Dairy, but also has the characteristics of low GI and complete nutrition.

[0096] Test Example 3: Results of electronic tongue test on complete nutrition low GI goat milk powder suitable for middle-aged and elderly people

[0097] In order to evaluate the differences between the sourness, sweetness, bitterness, astringency, richness, aftertaste-B and aftertaste-A of the complete nutrition low GI goat milk suitable for the middle-aged and elderly population and the products on the market, three products with high recognition among consumers on the market (goat milk powder A, goat milk powder B and goat milk powder C) were selected for comparative analysis with the created product (goat milk powder D). The results showed that ( Figure 3), goat milk powder D has the strongest richness, and the other flavors are not much different from those of products on the market. The goat milk powder created by the present invention is not only rich, but also has the characteristics of low GI and complete nutrition.

[0098] The above detailed description is a specific description of one feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention should be included in the scope of the technical solution of the present invention.

Claims

1. A complete nutrition low GI goat milk powder suitable for middle-aged and elderly people, wherein the complete nutrition low GI goat milk powder comprises the following raw material components by weight: 20-60 parts of raw goat milk, 10-30 parts of desalted whey powder, 10-30 parts of skim milk powder, 5-20 parts of stachyose composite prebiotic powder, 5-20 parts of powdered oil, 20-30 parts of enzymatically hydrolyzed germinated grain powder, 5-20 parts of polydextrose, 2-15 parts of whey protein powder (hydrolyzed), 2-15 parts of malt powder, 2-15 parts of whey protein powder (rich in milk fat globule membrane), 0.1-5 parts of taurine, 0.1-5 parts of complex vitamins, and 0.1-5 parts of complex minerals; in, The enzymatically hydrolyzed sprouted grain powder is obtained by crushing sprouted grains after enzymatic hydrolysis with a composite enzyme preparation, wherein the composite enzyme preparation comprises 1-2 parts of cellulase, 0.05-0.2 parts of papain and 0.1-0.5 parts of beta-amylase; the dosage of the composite enzyme preparation is 1-3wt.% of the sprouted grains; the enzymatic hydrolysis temperature is 35-40°C, and the enzymatic hydrolysis time is 1-2h.

2. The complete nutrition low GI goat milk powder according to claim 1, characterized in that: The complete nutrition low GI goat milk powder comprises the following raw material components in parts by weight: 30-50 parts of raw goat milk, 15-25 parts of desalted whey powder, 15-25 parts of skimmed milk powder, 8-16 parts of stachyose composite prebiotic powder, 8-16 parts of powdered oil, 20-30 parts of enzymatically hydrolyzed germinated grain powder, 8-15 parts of polydextrose, 3-12 parts of whey protein powder (hydrolyzed type), 5-12 parts of malt powder, 3-12 parts of whey protein powder (rich in milk fat globule membrane), 0.1-3 parts of taurine, 0.1-3 parts of complex vitamins, and 0.1-3 parts of complex minerals.

3. The complete nutrition low GI goat milk powder according to claim 1, characterized in that: The complete nutrition low GI goat milk powder comprises the following raw material components in parts by weight: 40 parts of raw goat milk, 20 parts of desalted whey powder, 20 parts of skimmed milk powder, 12 parts of stachyose composite prebiotic powder, 12 parts of powdered oil, 25 parts of enzymatically hydrolyzed germinated grain powder, 12 parts of polydextrose, 8 parts of whey protein powder (hydrolyzed type), 10 parts of malt powder, 8 parts of whey protein powder (rich in milk fat globule membrane), 1 part of taurine, 1 part of complex vitamins, and 1 part of complex minerals.

4. The complete nutrition low GI goat milk powder according to any one of claims 1 to 3, characterized in that: The mass ratio of the stachyose composite prebiotic powder, the enzymatically hydrolyzed germinated grain powder and the malt powder is 5-20:20-30:2-15.

5. The complete nutrition low GI goat milk powder according to any one of claims 1 to 3, characterized in that: The complex minerals include minerals of iron, calcium, zinc and magnesium.

6. The complete nutrition low GI goat milk powder according to any one of claims 1 to 3, characterized in that: The multivitamin includes vitamin A, vitamin D, vitamin E, vitamin K1, vitamin B1, vitamin B2, vitamin B6, vitamin B 12 , niacin, folic acid, pantothenic acid, vitamin C and biotin.

7. A process for preparing a complete nutritional low GI goat milk powder according to any one of claims 1 to 6, characterized in that: The steps include: (1) filtering, purifying and sterilizing raw goat milk; (2) Adding other raw materials into step (1) in proportion, wherein the composite minerals are dissolved in pure water at a temperature of 35-45° C. for 7-10 minutes before adding, and the composite vitamins are dissolved in pure water at a temperature of 35-45° C. for 3-5 minutes before adding; (3) Homogenize, concentrate, evaporate and spray dry to obtain the product.

8. The preparation process according to claim 7, characterized in that: The sterilization in step (1) is pasteurization, the sterilization temperature is 90-110° C., and the sterilization time is 15 minutes.

9. The preparation process according to claim 7, characterized in that: In step (3), the homogenization pressure is 10-14 MPa, the vacuum degree of the concentrated evaporation is 220-260 mbar, and the steam pressure is ≥0.6 MPa; the inlet air temperature of the spray drying is 165-185°C, and the exhaust air temperature is 90-92°C.

10. Use of the complete nutrition low GI goat milk powder according to any one of claims 1 to 6 or the complete nutrition low GI goat milk powder prepared according to the preparation process according to any one of claims 7 to 9 in preparing products suitable for middle-aged and elderly people.

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