Vitamins D and K2
Vitamin D3 occurs in nature almost exclusively in animal sources and particularly in fish, dairy products, eggs and meat. Plants, such as lichens and various fungi contain only very small amounts of the much less effective vitamin D2.
Vitamin D plays a very important role. It is one of the few vitamins that is not absorbed directly from food, but rather produced by skin cells from sunlight. It is not a vitamin in the traditional sense of the word, but rather a pro-hormone.
In contrast to many other vitamins, vitamin D is converted into an important hormone which regulates cell functioning and bodily processes. Almost all bodily cells have special receptors for the vitamin D hormone that are dependent on sufficient supply.
Vitamin D and vitamin K2 are cofactors in the regulation of calcium metabolism.Together, the two vitamins control the formation and breakdown of bone cells and important transport molecules that ensure the correct utilisation of calcium. Sunday Natural Vitamin D3 and K2 MK-7 combines the two nutrients in a ratio that ensures optimal synergy.
Vitamin D is still being intensively researched. New mechanisms of action of this fascinating vitamin are discovered almost every year. So far, the following statements on vitamin D have been released by the EU (EFSA):
Vitamin D contributes to
- Normal absorption and utilisation of calcium and phosphorus
- Normal blood calcium levels
- The maintenance of bones
- The maintenance of normal muscle function
- The maintenance of healthy teeth
- Normal function of the immune system
Vitamin D has a function in cell division.
Vitamin K contributes to
- Normal blood clotting
- The maintenance of normal bones
Vitamin K2 occurs in a variety of molecular structures known as homologues. Although the MK-7 homologue is currently considered the most effective, only the trans isomers are bioactive.
