Healthy food composition for relieving asthenopia and preparation method thereof

Abstract

The invention relates to the technical field of healthy food, and discloses a healthy food composition for relieving asthenopia and a preparation method, the composition is composed of main materials and auxiliary materials, the composition comprises the following raw materials by weight: 173-178 parts of bilberry extract; 38 to 42 parts of lutein oil; 17 to 22 parts of beewax; 264 to 270 parts of corn oil; 288 to 305 parts of gelatin; 146 to 153 parts of glycerol; 298 to 308 parts of purified water; 3-5 parts of caramel color; the preparation method comprises the following steps: sieving the bilberry extract, then weighing the rest raw materials, preparing capsule core material liquid and soft capsule skin glue liquid step by step, then setting pelleting conditions, respectively putting the capsule core material liquid and the capsule skin glue liquid into a soft capsule machine for pelleting treatment to obtain a capsule, and sequentially carrying out primary drying, capsule washing, secondary drying and capsule picking on the produced capsule to obtain the capsule. The prepared composition not only can improve the oxidation resistance of eyes, effectively scavenge free radicals and protect eye cells from oxidative damage, but also can enhance the anti-inflammatory activity of the eyes, so that the inflammatory response of the eyes is relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of health foods, and specifically to a health food composition for relieving visual fatigue and a preparation method thereof. Background Art

[0002] Visual fatigue, also known as eye fatigue, is a common disease related to excessive eye use, and its causes are complex and diverse. Most scholars believe that visual fatigue is the result of the interweaving of organic factors in the eyes or the whole body and mental and psychological factors, belonging to the category of psychosomatic medicine. Clinically, patients are prominently manifested by self-perceived eye symptoms, so it is often also called eye fatigue syndrome.

[0003] With the development of society, the incidence of visual fatigue shows a gradually increasing trend. On the one hand, the large-scale popularization of video terminals such as computers has enabled people to face electronic screens for a long time in work and life. Factors such as VDT flicker, glare, character changes, continuous fixation, and frequent accommodation can all induce the occurrence of visual fatigue, which has attracted the attention of ophthalmologists and labor protection departments. On the other hand, from different age groups, adolescents aged 12 - 18 are in the stage of vigorous growth and development. During junior high school and high school, the learning tasks are heavy, continuous eye use is common, and the myopia incidence rate is high; the human body development of people aged 18 - 40 is basically mature, the vision is relatively stable, but the work pressure is high, the eyes are overloaded, and visual fatigue is likely to occur; for people aged 40 - 60, the convergence and accommodation ability of the eyes decline. Many people with low hyperopia and emmetropia ignore or are reluctant to wear glasses because of their good distance vision, and it is extremely easy to have visual fatigue when using eyes at close range. From the analysis of occupational situations, visual fatigue mainly concentrates on people who need to continuously use eyes frequently, such as adolescent students, computer operators, financial and accounting personnel, textile workers, drivers and other professional workers.

[0004] In China, the problem of visual fatigue is becoming increasingly serious. According to the report of the "Medical Economic News", the number of people with visual fatigue in China is as many as 150 million, the average myopia rate of adolescents is 40%, and that of college students exceeds 70%. Especially in cities, more and more people begin to complain about red and dry eyes. Visual fatigue has become a relatively common phenomenon. Therefore, paying attention to eye health, improving visual fatigue, and improving the national health level have become social problems that cannot be ignored.

[0005] At present, it has been confirmed by modern pharmacological research and clinical application that a composition preferably using lutein oil and bilberry extract as the main raw materials has a reliable effect on relieving visual fatigue, and the combination of the two can jointly play the effect of relieving visual fatigue. Moreover, a soft capsule composition prepared with this composition as the raw material has a production process that meets the relevant requirements of food hygiene, reliable quality, safe to eat, no any toxic and side effects, and can be eaten for a long time. The composition has a smooth and beautiful appearance, can cover up the unpleasant taste of the medicine, is convenient to take, has a high bioavailability, and is suitable for the vast number of people in need. Summary of the Invention

[0006] (1) Technical problems to be solved

[0007] In view of the deficiencies of the prior art, the present invention provides a health food composition for relieving visual fatigue and a preparation method thereof. It has the advantages of smooth and beautiful appearance, can cover up the unpleasant taste of drugs, is convenient to take, has high bioavailability, and is suitable for the vast number of people in need of relieving visual fatigue, and solves the problems of short-lasting effect, potential safety hazards and inconvenient use existing in the traditional methods for relieving visual fatigue.

[0008] (2) Technical solutions

[0009] To achieve the above object, the present invention provides the following technical solutions: a health food composition for relieving visual fatigue, the composition is composed of main materials and auxiliary materials, and the weight part range of the raw materials of the composition is: bilberry extract 173-178 parts; lutein oil 38-42 parts; beeswax 17-22 parts; corn oil 264-270 parts; gelatin 288-305 parts; glycerol 146-153 parts; purified water 298-308 parts; caramel color 3-5 parts; titanium dioxide 1.5-2.5 parts.

[0010] Preferably, the bilberry extract and lutein oil form the main materials, and the beeswax, corn oil, gelatin, glycerol, purified water, caramel color and titanium dioxide form the auxiliary materials, and the lutein oil is composed of lutein powder and sunflower oil in a ratio of 6:5.

[0011] Preferably, the weight parts of the raw materials of the composition are: bilberry extract 175 parts; lutein oil 40 parts; beeswax 20 parts; corn oil 265 parts; gelatin 300 parts; glycerol 150 parts; purified water 300 parts; caramel color 4 parts; titanium dioxide 2 parts.

[0012] A preparation method of a health food composition for relieving visual fatigue is prepared according to the weight part range of the raw materials of the above-mentioned health food composition for relieving visual fatigue, and includes the following preparation steps: Step 1. Pretreatment of raw and auxiliary materials: Comply with the formula requirements to prepare the main materials and auxiliary materials, check the outer packaging, and transfer them to the clean area after removing the qualified outer packaging; Step 2. Sieving and weighing: Sieve the bilberry extract and then weigh the lutein oil, corn oil, beeswax, gelatin, glycerol, purified water, caramel color and titanium dioxide; Step 3. Prepare the sol: Add the weighed glycerol, purified water, caramel color and titanium dioxide into the gelatinizing tank and heat to obtain the soft capsule shell gum solution; Step 4. Prepare the soft capsule shell glue solution: Place the weighed corn oil and beeswax in the batching tank respectively, heat, dissolve, stir and cool them to obtain a mixed oil material. Then add the weighed lutein oil and bilberry extract to the mixed oil material, stir, sieve and evacuate to obtain the soft capsule core material solution; Step 5. Pill pressing: Set the temperature and relative humidity for pill pressing, and then put the core material solution and the shell glue solution into the soft capsule machine respectively for pill pressing; Step 6. Shaping: The produced soft capsules are preliminarily dried for 2 - 4 hours to obtain shaped soft capsules; Step 7. Washing and drying of pills: Wash the shaped soft capsules with edible ethanol with a concentration of 94% - 95% to remove the residual oil on the pills, and then dry the washed pills for a second time; Step 8. Selecting pills: The dried soft capsules are further selected to remove abnormal pills, pills with bubbles or oil leakage, and finally obtain the soft capsule composition.

[0013] Preferably, the bilberry extract contains anthocyanins, anthocyanosides and flavonoid compounds.

[0014] Preferably, in the sol process of step 3: S3.1. Add glycerol, purified water, caramel color and titanium dioxide into the glue melting tank, heat to 55 - 60 °C, and stir evenly; S3.2. Dropwise add gelatin into the glue melting tank under stirring, continue to heat up to 65 - 70 °C, and stir for 10 - 15 min until the gelatin is completely dissolved to obtain the glue solution; S3.3. After the gelatin is dissolved, control the vacuum degree between 0.05 - 0.08 Mpa, remove the bubbles in the glue solution, and then sieve the glue through an 80 - mesh sieve to obtain the soft capsule shell glue solution, and keep it warm at a temperature of 55 - 60 °C.

[0015] Preferably, in the preparation process of the soft capsule core material solution in step 4: S4.1. Place the weighed corn oil and beeswax in the batching tank respectively, heat to 70 - 80 °C, stir for 15 - 20 min until dissolved, and cool to room temperature to obtain a mixed oil material; S4.2. Then add the weighed lutein oil and bilberry extract to the mixed oil material in sequence, stir for 30 - 35 min, after stirring evenly, grind it through a colloid mill for 1 - 3 times, sieve it through a 100 - mesh sieve, and evacuate and defoam it under a pressure of 0.05 - 0.08 Mpa to obtain the soft capsule core material solution.

[0016] Preferably, the pill pressing conditions in step 5 are: the temperature is controlled between 18 - 24 °C, the relative humidity is controlled between 35% - 45%, and the pill pressing specification is 0.48 - 0.52 g / granule.

[0017] Preferably, in step six, the setting temperature: the setting temperature of the produced soft capsules is controlled between 18°C and 26°C.

[0018] Preferably, in step seven, the secondary drying process: the washed soft capsules are subjected to secondary drying in an environment with a temperature of 25°C to 35°C and a relative humidity of 20% to 40%. After drying for 24 to 48 hours, dry soft capsules are obtained.

[0019] Compared with the prior art, the present invention provides a health food composition for relieving visual fatigue and a preparation method, having the following beneficial effects: 1. By reasonably combining bilberry extract and lutein oil, the present invention gives full play to the synergistic effect of the two raw materials. Among them, bilberry extract is rich in anthocyanins, and lutein in lutein oil is an important retinal protection component. Combining the effects of the two enables the prepared composition not only to increase the antioxidant capacity of the eyes, effectively scavenge free radicals, protect eye cells from oxidative damage, but also to enhance its anti-inflammatory activity, helping to reduce the eye inflammatory response, thereby better relieving visual fatigue and improving the eye health level.

[0020] 2. By precisely controlling the weight ratio of bilberry extract and lutein oil, the present invention achieves the best balance of the effects of the two raw materials. The scientific ratio combination enables the prepared composition to ensure that anthocyanins and lutein can fully play their respective roles, and also avoid the decline of antioxidant capacity or anti-inflammatory activity caused by the imbalance of ingredient ratios, thus ensuring the high efficiency of the composition in relieving visual fatigue.

[0021] 3. By selecting sunflower oil as the carrier oil for lutein oil, the present invention can effectively improve the stability of the composition. Among them, sunflower oil contains rich vitamin E and has good antioxidant properties, which can protect lutein from oxidative decomposition, thereby extending the shelf life of the composition and maintaining the activity and content of lutein. The selection of this carrier oil can not only enhance the stability of the composition, but also further improve the overall quality of the composition, enabling it to better play the role of relieving visual fatigue in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a flowchart for the preparation of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] See also Figure 1 A healthy food composition for relieving visual fatigue, the composition consists of a main ingredient and auxiliary ingredients, and the weight range of the raw materials of the composition is: 173-178 parts of bilberry extract; 38-42 parts of lutein oil (lutein powder, sunflower oil); 17-22 parts of beeswax; 264-270 parts of corn oil; 288-305 parts of gelatin; 146-153 parts of glycerin; 298-308 parts of purified water; 3-5 parts of caramel color; 1.5-2.5 parts of titanium dioxide.

[0025] The above raw materials and their functions are: Table 1

[0026] Specifically, bilberry extract and lutein oil constitute the main ingredients, beeswax, corn oil, gelatin, glycerin, purified water, caramel color and titanium dioxide constitute the auxiliary ingredients, and the lutein oil is composed of lutein powder and sunflower oil in a ratio of 6:5.

[0027] Specifically, a method for preparing a healthy food composition for relieving visual fatigue is prepared according to the weight range of raw materials of the above-mentioned healthy food composition for relieving visual fatigue, and comprises the following preparation steps: Step 1: Pretreatment of raw and auxiliary materials: prepare the main and auxiliary materials according to the formula requirements, check the outer packaging, remove the qualified outer packaging and transfer them to the clean area. By checking the outer packaging, ensure that the raw and auxiliary materials put into production meet the quality and hygiene standards, ensure the quality of the composition from the source, and avoid raw material contamination or deterioration caused by unqualified outer packaging; Step 2, sieving and weighing: sieving the bilberry extract and then weighing the lutein oil, corn oil, beeswax, gelatin, glycerin, purified water, caramel color and titanium dioxide to avoid poor effect or quality problems of the composition due to deviation in the proportion of the ingredients, and set aside; Step 3, preparing sol: adding weighed glycerin, purified water, caramel color and titanium dioxide into a sol tank, heating to obtain soft capsule skin sol, and keeping warm for later use; Step 4, preparing soft capsule skin glue liquid: weighed corn oil and beeswax are placed in a batching tank respectively, heated, dissolved, stirred and cooled to obtain a mixed oil, and then weighed lutein oil and bilberry extract are added to the mixed oil, stirred, sieved and vacuumed to obtain a soft capsule core material liquid for standby use. The mixed oil is obtained by heating, dissolving, stirring and cooling corn oil and beeswax. This process allows the corn oil and beeswax to be fully mixed and uniformly formed to form a stable oil base. This mixing method can provide a good dispersion medium for lutein oil and bilberry extract, which helps to improve the uniformity of lutein oil and bilberry extract in the capsule core material liquid; Step 5, pill pressing: Set the temperature and relative humidity for pill pressing, and then separately put the core material liquid and the capsule skin glue liquid into the soft capsule machine for pill pressing. By separately putting the core material liquid and the capsule skin glue liquid into the soft capsule machine for pill pressing, this separate feeding method can more accurately control the dosage and ratio of the two materials, thereby ensuring that the core and the capsule skin thickness of each soft capsule are uniform, so as to improve the stability of the composition; Step 6, shaping: The produced soft capsules are preliminarily dried for 2 - 4 hours to obtain shaped soft capsules. This step can initially fix the shape of the soft capsules, reduce deformation and damage during subsequent operations. At the same time, preliminary drying can also remove a part of the moisture and improve the shelf life of the soft capsules; Step 7, washing and drying the pills: The shaped soft capsules are washed with edible ethanol with a concentration of 94% - 95% to wash off the residual oil liquid on the soft capsules. This concentration of edible ethanol can effectively wash off the residual oil liquid on the soft capsules, make the surface of the soft capsules cleaner, and avoid odor, discoloration or other quality problems caused by oil liquid residue. The washed soft capsules are then dried for the second time. Drying the washed soft capsules for the second time helps to further reduce the moisture content in the soft capsules, improve the drying degree of the soft capsules, extend the shelf life of the composition, and also helps to improve the disintegration performance and release characteristics of the soft capsules; Step 8, sorting the pills: The dried soft capsules are sorted to remove abnormal pills, pills with air bubbles or oil leakage. Sorting the pills can ensure that the quality and appearance of the final composition meet the standard requirements, improve the qualified rate of the composition. Finally, the soft capsule composition is obtained, and then it is packaged, inspected and stored in the warehouse.

[0028] Specifically, the bilberry extract in Step 1 is rich in anthocyanins, anthocyanosides and flavonoid compounds. In Step 2, sieving: The bilberry extract is sieved through a 100 - mesh sieve.

[0029] Specifically, the sol - gel process in Step 3: S3.1, Add glycerol, purified water, caramel color and titanium dioxide into the gel - melting tank, heat to 55 - 60 °C, and stir evenly; S3.2, Dropwise add gelatin into the gel - melting tank under stirring. This method of gradually adding gelatin and controlling the heating temperature and stirring time can ensure the full dissolution of gelatin, avoid the problems of gelatin caking or incomplete dissolution, thereby ensuring the quality and performance of the capsule skin glue liquid. Continue to heat up to 65 - 70 °C and stir for 10 - 15 min until the gelatin is completely dissolved to obtain the glue liquid; S3.3, After the gelatin is dissolved, control the vacuum degree between 0.05 - 0.08 Mpa, remove the air bubbles in the glue liquid, and then sieve the glue liquid through an 80 - mesh sieve to obtain the soft capsule capsule skin glue liquid, and keep it warm at a temperature of 55 - 60 °C for standby. By keeping it warm at a temperature of 55 - 60 °C for standby, it can maintain the good fluidity of the glue liquid, which is convenient for subsequent pill - pressing operations.

[0030] Specifically, the preparation process of the soft capsule core material liquid in step S4 is as follows: S4.1: Place the weighed corn oil and beeswax in the batching tank respectively, heat the temperature to between 70 and 80 °C to avoid oil oxidation or beeswax decomposition caused by too high temperature, ensure the stability of the raw materials, stir for 15 - 20 minutes until dissolved, and cool to room temperature to obtain the mixed oil material, avoiding thermal damage to the lutein oil and bilberry extract components caused by high temperature; S4.2: Then add the weighed lutein oil and bilberry extract to the mixed oil material in sequence and stir for 30 - 35 minutes. After stirring evenly, ensure that the components are evenly dispersed in sequence to avoid too high local concentration. Then grind through a colloid mill 1 - 3 times, and pass through a 100 - mesh sieve to further refine the component particles, improve the dispersion effect, enhance the stability of the composition, and at the same time ensure the fineness of the core material liquid of the capsule to avoid clogging the pill - pressing equipment. Carry out vacuum degassing treatment under a pressure of 0.05 - 0.08 Mpa to prevent air holes from appearing in the soft capsule and improve the appearance quality of the composition, and obtain the soft capsule core material liquid for standby.

[0031] Specifically, the pill - pressing conditions in step S5 are as follows: the temperature is controlled between 18 and 24 °C, and the relative humidity is controlled between 35% and 45%. Ensure that the soft capsule is not easily deformed during the forming process, and at the same time avoid the influence of too much or too little moisture on the capsule forming. The pill - pressing specification is 0.48 - 0.52 g per pill to ensure that the weight of each soft capsule is the same, and ensure the uniformity of the composition and the accuracy of the composition dosage.

[0032] Specifically, the setting temperature in step S6: the setting temperature of the produced soft capsule is controlled between 18 and 26 °C to ensure that the soft capsule can be quickly set after forming, and at the same time avoid the capsule softening or deforming caused by too high temperature.

[0033] Specifically, the secondary drying process in step S7: Carry out secondary drying on the washed soft capsules in an environment with a temperature of 25 - 35 °C and a relative humidity of 20% - 40%. After drying for 24 - 48 hours, obtain the dried soft capsules. By carrying out secondary drying in an environment with a temperature of 25 - 35 °C and a relative humidity of 20% - 40%, avoid the damage of high temperature and high humidity to the components of the soft capsule, and at the same time ensure the uniform drying of the capsule surface.

[0034] Example 1 Specifically, the raw material weight parts of the composition are as follows: 175 parts of bilberry extract; 40 parts of lutein oil; 20 parts of beeswax; 265 parts of corn oil; 300 parts of gelatin; 150 parts of glycerol; 300 parts of purified water; 4 parts of caramel color; 2 parts of titanium dioxide.

[0035] Comparative Example 1 Specifically, the raw material parts by weight of the composition are as follows: bilberry extract 100 parts; aloe extract 50 parts; beeswax 20 parts; corn oil 265 parts; gelatin 300 parts; glycerol 150 parts; purified water 300 parts; caramel color 4 parts; titanium dioxide 2 parts (in Comparative Example 1, lutein oil was replaced with aloe extract to investigate the alleviating effect of the composition on visual fatigue in the absence of lutein oil).

[0036] Example 2 Specifically, the raw material parts by weight of the composition are as follows: bilberry extract 173 parts; lutein oil (lutein powder, sunflower oil) 38 parts; beeswax 17 parts; corn oil 270 parts; gelatin 305 parts; glycerol 148 parts; purified water 299 parts; caramel color 3 parts; titanium dioxide 1.5 parts.

[0037] Comparative Example 2 Specifically, the raw material parts by weight of the composition are as follows: lemon extract 173 parts; lutein oil 38 parts; beeswax 17 parts; corn oil 270 parts; gelatin 305 parts; glycerol 148 parts; purified water 299 parts; caramel color 3 parts; titanium dioxide 1.5 (the bilberry extract was replaced with lemon extract, while keeping other raw materials similar to those in Example 2 to investigate the alleviating effect of the composition on visual fatigue in the absence of bilberry extract).

[0038] Example 3 Specifically, the range of raw material parts by weight of the composition is as follows: bilberry extract 178 parts; lutein oil (lutein powder, sunflower oil) 39 parts; beeswax 20 parts; corn oil 266 parts; gelatin 290 parts; glycerol 152 parts; purified water 301 parts; caramel color 5 parts; titanium dioxide 2.5 parts.

[0039] Comparative Example 3 Specifically, the raw material parts by weight of the composition are as follows: bilberry extract 155 parts; lutein oil 50 parts; beeswax 20 parts; corn oil 266 parts; gelatin 290 parts; glycerol 152 parts; purified water 301 parts; caramel color 5 parts; titanium dioxide 2.5 parts (the number of parts of lutein oil was increased and the number of parts of bilberry extract was decreased, while keeping other raw materials similar to those in Example 3 to investigate the alleviating effect of the composition on visual fatigue when the number of parts of lutein oil increases and the number of parts of bilberry extract decreases).

[0040] Example 4 Specifically, the range of raw material parts by weight of the composition is as follows: bilberry extract 176 parts; lutein oil (lutein powder, sunflower oil) 39 parts; beeswax 22 parts; corn oil 269 parts; gelatin 302 parts; glycerol 150 parts; purified water 306 parts; caramel color 4 parts; titanium dioxide 2 parts.

[0041] Comparative Example 4 Specifically, the raw material parts by weight of the composition are as follows: bilberry extract 176 parts; lutein oil (carotene, olive oil) 39 parts; beeswax 22 parts; corn oil 269 parts; gelatin 302 parts; glycerol 150 parts; purified water 306 parts; caramel color 4 parts; titanium dioxide 2 parts (replacing lutein powder and sunflower oil in lutein oil with carotene and olive oil, while keeping other raw materials similar to Example 4 to investigate the alleviating effect of the composition on visual fatigue when the lutein powder component in lutein oil is changed).

[0042] The above examples and comparative examples were made into compositions, and quality tests were conducted on the finished compositions. The test data are shown in Table 2 below: Table 2

[0043] From the analysis and comparison of the above examples, comparative examples, and Table 2, the following information was obtained: The influence of lutein oil (Example 1 and Comparative Example 1): In Comparative Example 1, due to the replacement with aloe extract, the lutein content was 0, the anthocyanin content decreased, and the DPPH scavenging rate and anti-inflammatory activity were significantly reduced, indicating that lutein and bilberry extract have synergistic effects; The core role of bilberry extract (Example 2 and Comparative Example 2): After replacing with lemon extract in Comparative Example 2, the anthocyanin was missing, and the functional indicators (DPPH, anti-inflammatory) decreased significantly, verifying that bilberry extract is the key component for relieving visual fatigue; Component ratio adjustment (Example 3 and Comparative Example 3): In Comparative Example 3, the lutein content increased but the anthocyanin decreased, and the functional indicators were still lower than those in Example 3, indicating that the two need to maintain a balanced ratio (such as anthocyanin: lutein ≈ 35:1); The influence of lutein carrier oil (Example 4 and Comparative Example 4): In Comparative Example 4, when using carotene + olive oil, the lutein content and stability ( marked) both decreased, indicating that it is related to the antioxidant effect of vitamin E in sunflower oil; Summary: The example formulations are all superior to the comparative examples. Among them, the best formulations are Example 1 and Example 3, taking into account both the anthocyanin and lutein contents, with high quality stability and optimal functional indicators.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it is understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A healthy food composition for relieving visual fatigue, characterized in that: The composition consists of a main ingredient and auxiliary ingredients, and the weight proportions of the raw materials of the composition are as follows: 173-178 parts of bilberry extract; 38-42 parts of lutein oil; 17-22 parts of beeswax; 264-270 parts of corn oil; 288-305 parts of gelatin; 146-153 parts of glycerol; 298-308 parts of purified water; 3-5 parts of caramel color; and 1.5-2.5 parts of titanium dioxide.

2. A healthy food composition for relieving visual fatigue according to claim 1, characterized in that: The bilberry extract and lutein oil constitute the main ingredients, the beeswax, corn oil, gelatin, glycerin, purified water, caramel color and titanium dioxide constitute the auxiliary ingredients, and the lutein oil consists of lutein powder and sunflower seed oil in a ratio of 6:

5.

3. The healthy food composition for relieving visual fatigue according to claim 1 is characterized in that: The raw materials of the composition are as follows: 175 parts of bilberry extract, 40 parts of lutein oil, 20 parts of beeswax, 265 parts of corn oil, 300 parts of gelatin, 150 parts of glycerin, 300 parts of purified water, 4 parts of caramel color and 2 parts of titanium dioxide.

4. A method for preparing a healthy food composition for relieving visual fatigue, characterized in that: The healthy food composition for relieving visual fatigue according to claim 1 is prepared according to the weight range of raw materials, comprising the following preparation steps: Step 1: Pre-treatment of raw and auxiliary materials: Prepare the main ingredients and auxiliary materials according to the formula requirements. Step 2, sieving and weighing: sieving the bilberry extract and then weighing lutein oil, corn oil, beeswax, gelatin, glycerin, purified water, caramel color and titanium dioxide; Step 3, preparing sol: adding weighed glycerin, purified water, caramel color and titanium dioxide into a sol tank, and heating to obtain soft capsule skin sol; Step 4, preparing soft capsule skin glue liquid: weighed corn oil and beeswax are placed in a batching tank respectively, heated, dissolved, stirred and cooled to obtain a mixed oil, and then weighed lutein oil and bilberry extract are added to the mixed oil, stirred, sieved and vacuumed to obtain a soft capsule core material liquid; Step 5, pill pressing: set the temperature and relative humidity for pill pressing, and then put the capsule core liquid and capsule skin glue liquid into the soft capsule machine for pill pressing; Step 6: Shaping: The produced capsules are initially dried for 2 to 4 hours to obtain shaped capsules; Step 7: washing and drying the pellets. The pellets are washed with 94% to 95% edible ethanol to remove the residual oil on the pellets. The washed pellets are then dried for a second time. Step 8, pill sorting: the dried capsules are sorted to remove irregular-shaped capsules, capsules with bubbles or oil leakage, and finally obtain a capsule composition.

5. The method for preparing a healthy food composition for relieving visual fatigue according to claim 4, characterized in that: The bilberry extract contains anthocyanidin, anthocyanin and flavonoid compounds.

6. The method for preparing a healthy food composition for relieving visual fatigue according to claim 4, characterized in that: The sol process in step 3: S3.

1. Add glycerin, purified water, caramel color and titanium dioxide into a glue tank, heat to 55-60℃ and stir evenly; S3.

2. Add gelatin dropwise into the gelatinization tank while stirring, continue heating to 65-70°C, and stir for 10-15 minutes until the gelatin is completely dissolved to obtain a gelatin solution; S3.

3. After the gelatin is dissolved, the vacuum degree is controlled between 0.05-0.08Mpa, the bubbles in the gelatin solution are extracted, and then the gelatin solution is sieved through an 80-mesh sieve to obtain the soft capsule skin gelatin solution, which is kept warm at a temperature of 55-60°C.

7. The method for preparing a healthy food composition for relieving visual fatigue according to claim 4, characterized in that: The preparation process of the soft capsule core liquid in step 4 is as follows: S4.

1. Place the weighed corn oil and beeswax in a mixing tank respectively, heat the tank to 70-80°C, stir for 15-20 minutes until dissolved, and cool to room temperature to obtain a mixed oil; S4.

2. Add the weighed lutein oil and bilberry extract to the mixed oil in sequence and stir for 30-35 minutes. After stirring evenly, grind it with a colloid mill for 1-3 times, pass it through a 100-mesh sieve, and degas it under a vacuum at a pressure of 0.05-0.08Mpa to obtain the soft capsule core liquid.

8. The method for preparing a healthy food composition for relieving visual fatigue according to claim 4, characterized in that: The pelletizing conditions in step 5 are as follows: the temperature is controlled between 18 and 24° C., the relative humidity is controlled between 35% and 45%, and the pelletizing specification is 0.48-0.52 g / pellet.

9. The method for preparing a healthy food composition for relieving visual fatigue according to claim 4, characterized in that: The setting temperature in step 6: the setting temperature of the produced capsules is controlled between 18 and 26°C.

10. The method for preparing a healthy food composition for relieving visual fatigue according to claim 4, characterized in that: The secondary drying process in step seven is as follows: the washed capsules are secondary dried at a temperature of 25 to 35° C. and a relative humidity of 20% to 40%. After drying for 24 to 48 hours, dried capsules are obtained.

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