Biological nano calcium supplement capsule and preparation method thereof

Abstract

The invention provides a biological nano calcium supplement capsule and a preparation method thereof. The biological nano calcium supplement capsule comprises egg shells and oatmeal. According to the biological nano calcium supplement capsule prepared by the method disclosed by the invention, the solubility of calcium is relatively high, and the calcium can be quickly absorbed by a human body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of food processing, in particular to a biological nano calcium supplement capsule and a preparation method thereof. BACKGROUND

[0002] Human calcium supplement is an important link to maintain health and prolong life, especially in specific groups such as pregnant women, infants, adolescents and the elderly. Calcium deficiency in infants can cause rickets, and with calcium loss, the health of the body is affected, causing frequent cramps, sometimes waking up in pain during sleep, and sometimes causing falls and fractures, affecting health. Traditional calcium supplement methods have low absorption rates, such as the combination of protein and calcium in milk to form water-insoluble compounds, the influence of oxalic acid on calcium absorption, and the absorption competition between zinc, iron and calcium.

[0003] In order to avoid these problems and meet the needs of different groups for effective calcium supplement, a new type of biological nano calcium supplement capsule needs to be developed. SUMMARY

[0004] The present application aims to provide a biological nano calcium supplement capsule and a preparation method thereof, which has a high solubility of calcium and can be quickly absorbed by the human body.

[0005] According to one aspect of the present application, a biological nano calcium supplement capsule is provided, which comprises eggshells and cereal.

[0006] According to some embodiments, the weight fraction of the eggshells is 95-99, and the weight fraction of the cereal is 1-5.

[0007] According to some embodiments, the eggshells are subjected to heating decomposition and grinding treatment to form a nano calcium oxide powder; The cereal is subjected to crushing and sieving treatment to form a cereal powder.

[0008] According to some embodiments, the nano calcium oxide powder is sieved through a 2000-mesh sieve, and the cereal powder is sieved through a 100-200-mesh sieve.

[0009] According to another aspect of the present application, a preparation method of a biological nano calcium supplement capsule is provided, comprising: Preparation of raw eggshells, soaking and drying treatment to remove residual protein film and impurities; Placing the cleaned and dried raw eggshells in a high-temperature furnace for calcination; Grinding the calcined eggshells to obtain a nano calcium oxide powder; Mixing the nano calcium oxide powder and the cereal powder in a sterile workshop and filling them into edible gelatin capsules.

[0010] According to some embodiments, the calcined eggshells are ground and then sieved through a 2000-mesh sieve.

[0011] According to some embodiments, the calcined eggshell is ground to obtain nano-calcium oxide powder, comprising: The calcium carbonate in the raw eggshell is decomposed into calcium oxide by calcination at 800-900°C for 1-3 hours.

[0012] According to some embodiments, the raw eggshells are 95 to 99 parts by weight.

[0013] According to some embodiments, the oatmeal powder is in the form of 1 to 5 parts by weight.

[0014] This example of a bio-nano calcium supplement capsule uses eggshells and oatmeal as its main ingredients. This not only effectively supplements calcium but also enhances calcium absorption through the vitamin D2 abundant in the oatmeal, forming an ideal combination of "calcium source + absorption-promoting factor." It also ensures nutritional balance and product safety. This formula is suitable for people of all ages, from middle-aged and elderly people who need to increase bone density to children and adolescents in their rapid growth phase.

[0015] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 A flowchart illustrating the preparation method of bio-nano calcium supplement capsules according to an example embodiment is shown.

[0018] Figure 2 A flowchart illustrating the preparation method of the composite bio-nano calcium supplement capsule according to an example embodiment is shown. Detailed Implementation

[0019] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0020] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the invention. However, those skilled in the art will recognize that the technical solutions of the invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the invention.

[0021] The block diagrams shown in the attached figures are merely functional entities and do not necessarily correspond to physically independent entities.

[0022] It should be understood that although the terms first, second, third, etc., may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another. Therefore, the first component discussed below may be referred to as the second component without departing from the teachings of the present invention. As used herein, the term "and / or" includes all combinations of any one and more of the associated listed items.

[0023] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of exemplary embodiments, and the modules or processes in the drawings are not necessarily essential for implementing the present invention, and therefore cannot be used to limit the scope of protection of the present invention.

[0024] Calcium supplementation is crucial for extending lifespan. The market offers a wide variety of calcium supplements, but many require combination with milk, root vegetables, zinc, iron supplements, and vitamins, resulting in very low absorption and binding rates. This is because milk protein binds with calcium to form curds, preventing absorption; excessive oxalic acid intake also interferes with calcium absorption. Furthermore, the body competes with zinc and iron for calcium absorption; simultaneous intake not only inhibits zinc and iron absorption but also interferes with calcium absorption itself. Low blood calcium levels can stimulate parathyroid hormone secretion, accelerating bone calcium breakdown, leading to decalcification and hypocalcemia, which in severe cases can cause convulsions.

[0025] Therefore, this invention proposes a bio-nano calcium supplement capsule and its preparation method. The bio-nano calcium supplement capsule prepared by the method of this invention has high calcium solubility and can be quickly absorbed by the human body.

[0026] Before describing the embodiments of the present invention, some terms or concepts involved in the embodiments of the present invention will be explained.

[0027] Calcium ATPase (Ca ATPases, also known as calcium pumps, are important membrane proteins that are primarily responsible for actively transporting calcium ions from inside the cell to the outside or storing them in specific areas inside the cell (such as the endoplasmic reticulum). Calcium ATPases are key to maintaining intracellular calcium homeostasis.

[0028] The following describes exemplary embodiments of the present invention in conjunction with the accompanying drawings.

[0029] Raw eggshells are rich in calcium, with a calcium carbonate content of 95-98%. This calcium is a type of biological nodular calcium, which is easily digested and absorbed. It can improve osteoporosis and calcium-phosphorus imbalance, and is suitable for children during their growth and development, adolescents, and middle-aged and elderly people with osteoporosis and calcium-phosphorus imbalance who need calcium supplementation.

[0030] The bio-nano calcium supplement capsules have high solubility and can be quickly absorbed by the body, generally not causing constipation. They can also promote bone growth and development and replenish calcium lost through calcium loss. The powder inside the bio-nano calcium supplement capsules has a fineness of up to 2000 mesh, with calcium molecules as small as a few micrometers, making them easier to dissolve and absorb, and causing no toxic side effects. However, people with hypercalcemia or hypercalciuria should avoid using the bio-nano calcium supplement capsules of this invention.

[0031] According to the example embodiment, the raw materials for the bio-nano calcium supplement capsules are eggshells and oatmeal. This not only makes full use of the rich calcium resources in raw eggshells, but also combines the nutrients in oatmeal to ensure that the produced bio-nano calcium supplement capsules are highly effective and safe, and are suitable for people of different ages and health conditions.

[0032] According to some embodiments, because the calcium in eggshells is a type of biogenic calcium, it is easily digested and absorbed, making it particularly suitable for the prevention and treatment of osteoporosis, calcium-phosphorus imbalance, and other problems. As a byproduct of the food industry, using eggshells to produce calcium supplements is not only environmentally friendly but also reduces waste disposal costs, making it a sustainable option.

[0033] Oatmeal is rich in vitamin D, including vitamin D2, which helps promote calcium absorption in the intestines and regulates calcium and phosphorus metabolism, thus enhancing bone health. Oatmeal is also rich in dietary fiber, which helps maintain normal bowel function and prevent constipation, especially important for people who take calcium supplements long-term. In addition to vitamin D, oatmeal also contains various B vitamins, minerals (such as iron and zinc), and antioxidants, providing comprehensive nutritional support for the body.

[0034] According to some embodiments, the eggshells comprise 95-99 parts by weight, and the oatmeal comprises 1-5 parts by weight. Eggshells, as a primary source of calcium, provide a high content of calcium carbonate, which is converted into calcium oxide after processing. This high proportion ensures that each unit of product contains sufficient calcium to meet the calcium needs of different age groups. Although the oatmeal constitutes a relatively small proportion of the formula, it is rich in vitamin D2, which promotes calcium absorption. Adding an appropriate amount of oatmeal not only enhances calcium bioavailability but also introduces additional nutrients such as dietary fiber and B vitamins, contributing to a comprehensive improvement in the product's nutritional value. By rationally configuring the ratio of eggshells to oatmeal, the advantages of each ingredient can be maximized, effectively enhancing the overall functionality of the product.

[0035] The preparation of bio-nano calcium supplement capsules requires further processing of eggshells and oatmeal. The following is the specific processing procedure for eggshells and oatmeal.

[0036] Figure 1 A flowchart illustrating the preparation method of bio-nano calcium supplement capsules according to an example embodiment is shown.

[0037] See Figure 1 In S101, raw eggshells are prepared, soaked, and dried to remove residual protein membranes and impurities.

[0038] According to some embodiments, food-grade raw eggshells are collected and initially soaked in clean water to soften residual protein membranes and other impurities. The eggshells are then thoroughly rinsed with clean water to remove stains and residues. The cleaned eggshells are placed in a drying device to accelerate the drying process, ensuring complete evaporation of moisture and avoiding unnecessary byproducts during subsequent calcination.

[0039] In S103, the cleaned and dried raw eggshells are placed in a high-temperature furnace for calcination.

[0040] According to some embodiments, dried eggshells are placed in a high-temperature furnace and calcined at approximately 800°C for 1-3 hours. This process decomposes calcium carbonate into calcium oxide (CaO) and releases carbon dioxide (C₂O₃). After calcination, allow the eggshells to cool naturally to room temperature.

[0041] The chemical reaction equation is as follows: CaCO3 CaO + CO2↑ In S105, the calcined eggshell is ground to obtain nano-calcium oxide powder.

[0042] According to some embodiments, calcined eggshells rich in calcium oxide are placed in a nano-grinding mill for fine grinding. Optionally, a 2000-mesh sieve can be used to sieve the ground powder to ensure uniform particle size and improve solubility and absorption efficiency.

[0043] In S107, in a sterile workshop, the nano-calcium oxide powder is mixed with oatmeal powder and filled into edible gelatin capsules.

[0044] According to some embodiments, oatmeal without added sugar, artificial flavors, or other additives is selected. The oatmeal is treated with ultraviolet light to enrich vitamin D2. The selected oatmeal is initially pulverized in a food-grade grinder to a fineness of 100-200 mesh. The pulverized oatmeal is then sieved to remove larger particles, ensuring a fine and uniform powder to guarantee the uniformity and solubility of the final product.

[0045] In a sterile workshop, the two powder materials are precisely weighed according to a predetermined ratio, for example, 95-99 parts by weight of raw eggshells and 1-5 parts by weight of oatmeal powder, and thoroughly mixed to ensure uniform distribution of all components. The mixed powder is then filled into edible gelatin capsules using automated equipment. Immediately after filling, the capsules are vacuum-sealed to prevent moisture absorption and clumping, thus maintaining stable product quality.

[0046] According to some embodiments, quality testing should be conducted after each key step, including but not limited to the heavy metal content of raw materials, microbial contamination, and the content of active ingredients in the finished product, to ensure the safety and effectiveness of the final product.

[0047] The preparation method of the bio-nano calcium supplement capsule in this example embodiment uses raw eggshells as the main raw material. The main component of raw eggshells is calcium carbonate (CaC). Under high temperature conditions, it undergoes a thermal decomposition reaction, producing calcium oxide (CaO) and carbon dioxide gas (C). When carried out in a closed or well-ventilated industrial furnace, the reaction is controllable and safe. Carbon dioxide is a colorless and odorless gas and is not considered toxic. It can be safely emitted in a well-ventilated environment and is harmless to humans and the environment. Provided the raw materials are pure, the calcination process does not produce toxic gases, making the process safe and reliable.

[0048] Eggshells should be selected from those that are not contaminated with oil, detergents, pesticides, heavy metals or other organic pollutants, otherwise they may produce substances such as carbon monoxide (CO), sulfides, nitrogen oxides or volatile organic compounds.

[0049] According to some embodiments, if eggshells come into contact with the following substances before collection, harmful components may be released at high temperatures: if the eggshells contain chlorine detergent residue, chlorine gas or dioxins may be generated under extremely high temperature and oxygen-deficient conditions; if contaminated with grease or organic matter, smoke or hydrocarbons may be produced under incomplete combustion; and if contaminated with heavy metals such as lead or cadmium, they may volatilize or form aerosols. Therefore, in step S101, rigorous cleaning, rinsing with deionized water if necessary, and drying are required as pretreatment to effectively remove pollutants and ensure the safety and environmental friendliness of the calcination process.

[0050] After the bio-nano calcium supplement capsules of this example embodiment are taken, the raw materials of the bio-nano calcium supplement capsules undergo a calcium oxide hydration reaction in the gastrointestinal tract. The nano-sized calcium oxide (CaO) rapidly reacts with water to generate calcium hydroxide after entering the digestive tract. The reaction formula is as follows: CaO + H₂O → Ca(OH)₂ Calcium hydroxide is a strong base-weak acid salt, which further dissociates into calcium ions (Ca) in the acidic environment of the stomach. The active absorption mechanism of calcium, calcium ions (Ca) It is absorbed in the small intestine (especially the duodenum).

[0051] Vitamins in oatmeal In vivo, it is converted into its active form (calcitriol), which binds to vitamin D receptors (VDRs) in the nucleus of intestinal epithelial cells, promoting the synthesis of calcium-binding proteins (such as calbindin-D9k). These proteins assist in the transmembrane transport of calcium ions and activate calcium ATPases (also known as calcium pumps). -ATPase actively transports calcium into the bloodstream, enabling efficient absorption.

[0052] According to some embodiments, traditional Chinese medicine essence powder can also be added to the bio-nano calcium supplement capsule of the present invention to make a composite bio-nano calcium supplement capsule, wherein the traditional Chinese medicine essence powder is extracted from traditional Chinese medicine preparations, including Drynaria fortunei, Angelica sinensis, dragon's blood, myrrh, catechu, Eupolyphaga sinensis and natural copper.

[0053] Among them, natural copper needs to be treated with "vinegar moxibustion" in advance, a total of 18 times. Each time, it is stir-fried with rice vinegar until slightly red, and then repeated after cooling to enhance its effect of promoting callus formation.

[0054] The compound bio-nano calcium supplement capsule contains 1-10 parts by weight of traditional Chinese medicine essence powder, 95-99 parts by weight of eggshell, and 1-5 parts by weight of oatmeal. The ratio of each ingredient in the traditional Chinese medicine essence powder is: Drynaria fortunei: Angelica sinensis: Dragon's blood: Myrrh: Catechu: Eupolyphaga sinensis: Natural copper = 2:2:2:2:2:2:2:3.

[0055] According to records, Drynaria fortunei can nourish the kidneys and strengthen bones, promote fracture healing, and contains flavonoids such as naringin, which promote osteoblast proliferation, inhibit osteoclast activity, and significantly increase bone density.

[0056] Angelica sinensis root can nourish and invigorate blood, improving local blood circulation and relieving swelling and pain after fractures. Modern research shows that the polysaccharides and ferulic acid in Angelica sinensis can promote angiogenesis and accelerate wound healing.

[0057] Dragon's blood has the effects of promoting blood circulation and relieving pain. It is used for injuries from falls and blows, bruises and swelling, and has a significant analgesic effect. It can promote wound healing and is suitable for external injuries and postoperative recovery.

[0058] Myrrh disperses blood stasis and relieves pain; when combined with dragon's blood, it enhances the body's ability to promote blood circulation and remove blood stasis. It can reduce local inflammatory responses and promote tissue regeneration. It also has inhibitory effects on various bacteria, preventing secondary infections.

[0059] Catechu has the functions of astringing and healing sores, reducing wound exudation, accelerating wound drying and healing, and helping to improve local blood circulation.

[0060] Ground beetles can promote callus formation at fracture ends and shorten healing time. They contain amino acids and nucleosides, which can stimulate osteoblast differentiation and enhance bone repair capabilities.

[0061] Natural copper has the effect of dispersing blood stasis and relieving pain, and is used for pain caused by bruises, sprains, and fractures. After being treated with vinegar moxibustion, its blood-activating effect is enhanced. Repeated calcination loosens the mineral structure, making it easier to release the active ingredients and improve bioavailability.

[0062] The traditional Chinese medicine formula selected in this embodiment has a rigorous structure, integrating four major functions: tonifying the kidney, promoting blood circulation, promoting bone healing, and promoting tissue regeneration. When combined with highly absorbable nano-calcium, it forms a dual mechanism of "external calcium supplementation + internal regulation of bone metabolism".

[0063] Figure 2 A flowchart illustrating the preparation method of the composite bio-nano calcium supplement capsule according to an example embodiment is shown.

[0064] See Figure 2 In S201, eggshell powder is prepared.

[0065] As described above, the preparation process of eggshell powder is the same as steps S101 to S105, and the nano-calcium oxide powder (eggshell powder) is prepared for use.

[0066] In S203, prepare the essence powder of traditional Chinese medicine.

[0067] According to some embodiments, the preparation process of the Chinese herbal essence powder involves weighing 2 parts by weight of Drynaria fortunei, 2 parts by weight of Angelica sinensis, 2 parts by weight of Daemonorops draco, 2 parts by weight of Commiphora myrrha, 2 parts by weight of Catechu, 2 parts by weight of Eupolyphaga sinensis and 3 parts by weight of natural copper in proportion, pulverizing them into coarse powder, sieving them (40-60 mesh), and then mixing them evenly.

[0068] Add the above mixed powder to a 75%~85% ethanol solution. The weight of the mixed powder is 1 and the weight of the ethanol solution is 8~10. After it is fully dissolved, heat and reflux to extract 2~3 times, each time for 1.5~2 hours. Combine the extracts, filter, and concentrate under reduced pressure to a clear extract with a relative density of 1.10~1.20.

[0069] The concentrated extract is dried into a fine powder using a spray drying device to obtain the Chinese herbal essence powder, which is then sealed and stored away from light.

[0070] In S205, an automatic capsule filling machine fills composite bio-nano calcium supplement capsules.

[0071] According to some embodiments, in a sterile workshop, the powders are precisely weighed and mixed in a ratio of 1 part by weight of Chinese herbal essence powder and 9 parts by weight of eggshell powder.

[0072] This invention's bio-nano calcium supplement capsules use food-grade eggshells as the calcium source, refined through processes such as high-temperature calcination at approximately 800°C and nano-grinding. No chemically synthesized raw materials are added during the process, and no toxic gases are emitted. Combined with oatmeal rich in vitamin D2, it promotes the effective absorption of calcium ions in the intestines, contributing to bone health.

[0073] For the average consumer, adequate calcium supplementation helps maintain bone health, but it's important to avoid excessive intake, follow recommended dosages, and regularly monitor health to prevent the aforementioned complications. While bio-nano calcium supplements offer a highly effective and safe way to supplement calcium for most people, they should be avoided by individuals with certain health conditions, such as hypercalcemia or hypercalciuria.

[0074] To ensure the quality and safety of bio-nano calcium supplement capsules, strict quality control points must be followed. The following tests are conducted during the preparation process of bio-nano calcium supplement capsules: The raw materials are inspected to check the reliability of the eggshell source. Based on GB 2762-2017 "National Food Safety Standard - Limits of Contaminants in Food", tests are conducted for heavy metal content (such as lead, mercury, cadmium), pesticide residues, and microbial contamination (such as E. coli and Salmonella). Specifically, lead (Pb) ≤ 0.5 mg / kg, cadmium (Cd) ≤ 0.1 mg / kg, and mercury (Hg) ≤ 0.05 mg / kg.

[0075] The oatmeal was tested to confirm its vitamin D2 content. The vitamin D2 content is set according to the product formulation requirements; generally, it is recommended that each 100g contain no less than 5-10μg of vitamin D2. Following GB 2760-2014, "National Food Safety Standard for the Use of Food Additives," the oatmeal was ensured to be free of any unapproved additives, and the presence of preservatives or other ingredients that may affect health was tested.

[0076] Intermediate process testing involves determining the purity of the calcined calcium oxide powder to ensure complete conversion of calcium carbonate into calcium oxide. The purity of the calcium oxide is confirmed to be ≥95% using titration or other chemical analysis methods. Simultaneously, the presence of unreacted impurities or byproducts is checked, and X-ray diffraction (XRD) and other techniques are used to confirm the absence of unreacted calcium carbonate and other impurities.

[0077] After grinding, the nano-calcium oxide powder is used to determine whether the powder particle size distribution meets the requirements (e.g., 2000 mesh) and to check the particle uniformity and dispersibility. A laser particle size analyzer is used to measure to ensure that the average particle size is within the range of 2000 mesh (about 7 micrometers) and that more than 90% of the particles are smaller than the specified maximum particle size.

[0078] The mixture is tested to ensure that the nano-calcium oxide and oatmeal powder are accurately mixed in the predetermined ratio. Microbial limit tests are performed on the finished bio-nano-calcium supplement capsules according to the implemented standards to ensure no pathogenic contamination, such as total bacterial count, mold and yeast count, and detection of specific pathogens (e.g., Staphylococcus aureus, Pseudomonas aeruginosa). Referring to the GB 4789 series standards, the total bacterial count should be ≤10^4 CFU / g, the mold and yeast count ≤100 CFU / g, and pathogenic bacteria such as Escherichia coli, Salmonella, and Staphylococcus aureus should not be detected. Heavy metal testing is performed on the final product to ensure compliance with food safety standards.

[0079] The bio-nano calcium supplement capsules prepared by the method in this example embodiment use food-grade eggshells as the main raw material, avoiding potential side effects or allergic reactions from chemically synthesized products. From raw material selection, cleaning, and calcination to finished product testing, the entire production process adheres to strict food safety standards, ensuring no heavy metal contamination and no excessive microorganisms. The eggshells are finely ground and sieved to 2000 mesh, greatly increasing the specific surface area and improving the solubility and absorption efficiency of calcium oxide in the body. The addition of vitamin D2-rich oatmeal promotes intestinal calcium absorption and improves bioavailability.

[0080] This invention utilizes eggshells, a resource typically considered waste, to achieve effective resource reuse, aligning with the concept of a circular economy. The resulting bio-nano calcium supplement capsules provide effective nutritional support for children during their growth and development, adolescents, and the elderly in preventing osteoporosis.

[0081] This example demonstrates that by implementing the above-mentioned quality control measures, the safety, stability, and effectiveness of the bio-nano calcium supplement capsules can be effectively guaranteed, thus meeting consumers' expectations for calcium supplementation.

[0082] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0083] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0084] Exemplary embodiments of the present invention have been specifically shown and described above. It should be understood that the present invention is not limited to the detailed structures, arrangements, or implementations described herein; rather, the present invention is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended provisions.

Claims

1. A bio-nano calcium supplement capsule, characterized in that, The raw materials for the bio-nano calcium supplement capsules include eggshells and oatmeal.

2. The bio-nano calcium supplement capsule according to claim 1, characterized in that, The eggshells comprise 95-99 parts by weight, and the oatmeal comprises 1-5 parts by weight.

3. The bio-nano calcium supplement capsule according to claim 2, characterized in that, The eggshells are heated, decomposed, and ground to produce nano-calcium oxide powder; The oatmeal is crushed and sieved to produce oatmeal powder.

4. The bio-nano calcium supplement capsule according to claim 3, characterized in that, The nano-calcium oxide powder is sieved through a 2000-mesh sieve, and the oatmeal powder is sieved through a 100-200-mesh sieve.

5. A method for preparing a bio-nano calcium supplement capsule, characterized in that, include: Prepare raw eggshells, soak and dry them to remove residual protein membranes and impurities; The cleaned and dried raw eggshells are placed in a high-temperature furnace for calcination; The calcined eggshells were ground to obtain nano-calcium oxide powder; In a sterile workshop, the nano-calcium oxide powder is mixed with oatmeal powder and then filled into edible gelatin capsules.

6. The preparation method according to claim 5, characterized in that, After grinding the calcined eggshells, the process further includes: The material is sieved through a 2000-mesh screen.

7. The preparation method according to claim 5, characterized in that, The calcined eggshells are ground to obtain nano-calcium oxide powder, comprising: The calcium carbonate in the raw eggshell is decomposed into calcium oxide by calcination at 800-900°C for 1-3 hours.

8. The preparation method according to claim 5, characterized in that, The raw eggshells comprise 95-99 parts by weight.

9. The preparation method according to claim 5, characterized in that, The oatmeal powder is in the form of 1 to 5 parts by weight.

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