Vitamin K plays a key role in helping the blood clot, preventing excessive bleeding. Unlike many other vitamins, vitamin K is not typically used as a dietary supplement. Vitamin K is actually a group of compounds. The most important of these compounds appears to be vitamin K1 and vitamin K2. Vitamin K1 is obtained from leafy greens and some other vegetables. Vitamin K2 is a group of compounds largely obtained from meats, cheeses, and eggs, and synthesized by bacteria.
Vitamin D comprises a group of fat-soluble compounds essential for maintaining the mineral balance in the body; the vitamin D form synthesized in humans is called cholecalciferol (vitamin D3). Because cholecalciferol is synthesized in the skin by the action of ultraviolet light (UVB), vitamin D doesnt fit the classical definition of a vitamin - although this doesnt stop it being recognized as an essential dietary nutrient.
Grade: Medicine grade Life stage: Adult, children, elderly. Assay: 99.8%
Vitamin A is used for treating vitamin A deficiency. It is also used to reduce complications of diseases such as malaria, HIV, measles, and diarrhea in children with vitamin A deficiency. Women use vitamin A for heavy menstrual periods, premenstrual syndrome (PMS), vaginal infections, yeast infections, lumpy breasts(fibrocystic breast disease), and to prevent breast cancer. Some women with HIV use vitamin A to decrease the risk of transmitting HIV to the baby during pregnancy, childbirth, or breast-feeding. Some people use vitamin A for improving vision and treating eye disorders including age-related macular degeneration (AMD), glaucoma, and cataracts.