1.Why Vitamin D is called "sunshine vitamin"? [ ] A. Because it is like sunshine B. Because people can get vitamin D in the sun. C. Because it is very important D. Because there isn't enough vitamin D in the food. 2.If people have enough vitamin D, they can avoid ___. ...
Researcher Heike Bischoff-Ferrari wrote in the report.”it is possible for people to increase the amount of vitamin D earlier to keep healthy.” 1.Why Vitamin D is called“sunshine vitamin”? A.Because it is like sunshine B.Because people can get vitamin D in the sun. C.Because it is ...
Vitamin A deficiency is rare in the U.S. Most people get enough vitamin A from their diets. If you have a vitamin A deficiency, you might notice you have bad night vision. This is calledxerophthalmia, and it's the most common symptom of not having enough vitamin A. If your levels of...
Vitamin A is readily destroyed upon exposure to heat, light, or air. The vitamin, which functions directly invision, isconvertedinto retinaldehyde, a component of a light-sensitive pigment calledrhodopsin(visual purple), which is present in theretinaof the eye. In the form of retinoic acid comb...
Background is called “the vitamin of the news”. We can read extensively in the spare time to accumulate knowledge, so that we can understand the background better.<br/> A、正确<br/> B、错误
Choline also functions in the transport of fats from the liver; for this reason, it may be called a lipotropic factor. A deficiency of choline in the rat results in an accumulation of fat in the liver. Choline-deficiency symptoms vary among species; it is not known if choline is an ...
: a pale yellow crystalline vitamin C41H56O2 that is produced by bacteria (as in the intestines of animals) and obtained especially from meat and fermented foods and that typically has greater bioavailability than vitamin K1 called also menaquinone 2...
Hugh Begg SENR., F.R.C.V.S.The Veterinary Journal (1900)
A synthetic vitamin K precursor called menadione (vitamin K3) is used as a vitamin supplement. First recognized in 1929, the vitamin was isolated and analyzed structurally in 1939 by Danish biochemist Henrik Dam. A deficiency of vitamin K in the body leads to an increase in clotting time of...
Vitamin C is essential for the synthesis ofcollagen, a protein important in the formation ofconnective tissueand in wound healing. It acts as anantioxidant, protecting against damage by reactive molecules called free radicals. The vitamin also helps instimulatingtheimmune system. It has been shown ...