Vitamin D3 Tablets 1000iu (15tabs/blister, 2blisters/box)

• Dossier: Ctd
• GMP: Chinese GMP
• Transport Package: Free
• Specification: 1000IU
• Trademark: Sinolead
• Origin: China
• Model NO.: tablets

Product Description

Generic Name	Vitamin D3 Tablets 1000IU
Strength	1000IU
Packing	15tabs/blister,2blisters/box
Origin	China

Component:
Vitamin D3, also known as cholecalciferol, is a kind of vitamin D. The 7-dehydrocholesterol generated after cholesterol dehydrogenation can be irradiated by ultraviolet light to form cholecalciferol, so that the vitamin D of cholecalciferol is 7-dehydrocholesterol.

Vitamin D is a fat-soluble vitamin, which is also regarded as a hormone precursor that acts on calcium and phosphorus metabolism, and is closely related to sunlight, so it is also called the "sunshine vitamin". Vitamin D is A family of A, B, C, D ring structure is the same, but different side chain of a class of complex, A, B, C, D ring structure from the steroid cyclopentahydrophenanthrene ring structure, there are at least 10 known vitamin D, but the most important is vitamin D2 (ergocalcitol) and vitamin D3 (cholecalciferol).

Vitamin D2 is produced by UV irradiation of ergosterol in plants and is less present in nature. Vitamin D3 is converted from the 7-dehydrocholesterol contained in the epidermis and dermis of most higher animals by ultraviolet radiation (wavelength 265 to 228nm). Vitamin D3 is an active form of vitamin D with the highest biological metabolic rate. Vitamin D mentioned in the following text mainly refers to vitamin D3.

Vitamin D3 (cholecalciferol) is mainly synthesized by the body itself, the human skin contains a kind of cholesterol, after exposure to the sun, it becomes vitamin D3. Therefore, if the child can fully accept the direct sunlight on the skin for more than 4-6 hours, its own synthesis of vitamin D3 can basically meet. However, due to the rise of skin cancer caused by ultraviolet radiation, air pollution, and local weather changes, people in various countries are exposed to fewer hours of sunlight, and many countries have specified limits on exposure to sunlight, so vitamin D deficiency is widespread around the world. In addition, vitamin D3 can also come from animal foods, such as liver, especially fish liver oil extracted from Marine fish liver. In addition to the presence of vitamin D3 in a few animal foods, it is mainly formed by 7-dehydrocholesterol in the skin after ultraviolet irradiation, and 7-dehydrocholol is generated by the transformation of cholesterol, so some people call it the sun vitamin.

Vitamin D3 is fat-soluble, insoluble in water, can only be dissolved in fat or fat solvents, and can withstand high temperature and oxidation in neutral and alkaline solutions. According to the experiment, under the condition of 130 degrees heating for 90 minutes, its physiological epidemic is still not destroyed, but under acidic conditions it is gradually decomposed and destroyed, general food cooking and pattern process, will not lose, but fatty acid rout can cause the destruction of vitamin D3. There are two units of measurement of vitamin D3, namely weight units and international units. 1 microgram of D3 is equivalent to 40 international units; Or 1 international unit of vitamin D3 is equivalent to 0.025 micrograms of cholecalciferol.

Vitamin D3 content of sea liver is the most abundant, such as cod, sole and swordfish liver per 100 grams of vitamin D3200~750 micrograms, 500~10000 micrograms, 25000 micrograms. Other fish such as herring, salmon, sardines and pomfret contain small amounts; Livestock liver, eggs and milk also contain small amounts, with a content of less than 100 micrograms per 100 grams. In general, it is not easy to obtain enough vitamin D3 from food alone, so the synthesis of vitamin D3 by sunbathing in the body is a particularly important way.