called also retinol, vitamin A1 b : a yellow viscous liquid alicyclic alcohol C20H27OH that contains one more double bond in a molecule than vitamin A1 and is less active biologically in mammals and that occurs especially in the liver oil of freshwater fish called also vitamin A2 More...
?Vitamin A?(CAS NO.68-26-8) is also called as Retinol [INN:BAN] ; (all-E)-3,7-Dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraen-1-ol ; 2,4,6,8-Nonatetraen-1-ol, 3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-, (all-E)- ; 3,7-Dimethyl...
also were caused bydeficienciesof factors of the same chemical type. Because each of these factors had a nitrogen-containing component known as anamine, he called the compounds “vital amines,” a term that he later shortened to “vitamines.” The finalewas dropped later when it was discovered...
a white, crystalline, water-soluble vitamin, C6H8O6, occurring naturally in citrus fruits, green vegetables, etc., and also produced synthetically, essential for normal metabolism: used in the prevention and treatment of scurvy, and in wound-healing and tissue repair. Also calledvitamin C. ...
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 ___. ...
Vitamin A is important to vision and bone growth. Night vision is highly dependent on vitamin A since it is used to form pigments that allow our eyes to adjust to changes in light. Vitamin A also plays a vital role in white blood cell production and the maintenance of several organs, inc...
Besides getting vitamin D through sunlight, you can also get it through certain foods and supplements to ensure adequate levels of the vitamin in your blood.【小题1】Why is Vitamin D sometimes called “Sunshine Vitamin”?A.Because it is produced in your skin reacting to sunlight.B.Because it...
As early as 1000 years ago, the Qian Jin Yao Fang written by Sun Simiao in Tang Dynasty recorded that animal liver can cure night blindness. This is the early recognition in vitamin A supplementation. The traditional Chinese medicine books also recorded that nourishing the liver can improve eyes...
Learn more about VITAMIN A uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain VITAMIN A.
People with high levels of niacin, also known as vitamin B3, in their blood may be more likely to have a heart attack or stroke than those with lower levels. Excessive amounts of the vitamin, which is routinely added to fortified food and can be taken as a supplement, may inflame blood...