Vitamin D is a fat-soluble vitamin. Known to have vitamin D effect of more than a dozen kinds of compounds, no series of sterol derivatives, which has important practical significance is vitamin D2 and vitamin D3 two. The world to D3 is the main, vitamin D ‘international standard substance’ is also a pure crystal of D3. The main function of vitamin D is the metabolism of calcium and phosphorus, and it is difficult to promote the absorption of calcium and phosphorus as well as the calcification of bones.
When the human body lacks D, the ability to absorb calcium and phosphorus is reduced, the level of calcium and phosphorus in the blood decreases, so that calcium and phosphorus can not be deposited in the bone tissue, and even bone salts will dissolve, hindering the calcification of bones. Children get rickets if they lack it, and adults get osteochondrosis. In Japan, the production and use of D2 is high, with 30% of the demand for medicine, 65% for feed additives, and 5% for food additives.
According to the ‘Hygienic Standards for the Use of Food Nutritional Enrichment Agents (1993)’ issued by the Ministry of Health of China, D2 and D3 as nutritional supplements can be used in liquid milk, margarine, dairy products, and baby food.
Product method of Bulk Cholecalciferol Powder.
Vitamin D3 occurs naturally in liver, milk and egg yolks, and is produced industrially by extracting 7-dehydrocholesterol, which cannot be absorbed by the body, from vegetable oils or yeast, and solving it in chloroform or cyclohexane, and then converting it to vitamin D3 in quartz glass flasks using ultraviolet light.
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