Vitamin (维生素) D is called "sunshine vitamin," and it is very important to health, yet more Americans are not getting enough, U.S. researchers said on Monday. Researchers found that 75 percent of Americans can't reach the levels of vitamin D, up from about 50 percent of them 20 year...
Vitamin D2 Vitamin D2, also called ergocalciferol, is found naturally in mushrooms that have been exposed to the sun. Mushrooms contain a yeast compound called ergosterol, which is converted to ergocalciferol on exposure to UV light. Maitake mushrooms are one of the best sources of vitamin D...
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 ...
A bone disease of children marked by bone demineralization and defective bone growth, caused usually by a deficiency of or an impaired metabolism of vitamin D. Also calledrachitis. [Origin unknown.] American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Hou...
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...
Vitamin D also: Helps your body absorb calcium and another mineral called phosphorous Boosts your immune system And calcium: Helps your blood flow through your blood vessels Helps hormones get into your bloodstream If you have too little calcium, you could have weak bones (known as osteoporosis...
Besides getting vitaminD through sunlight, you can also get it through certain foods and supplements to ensure adequate levels of the vitamin in your blood.Why is Vitamin D sometimes called "Sunshine Vitamin"?A.Because it is produced in your skin reacting to sunlight.B.Because it is named a...
vitamin D2 n. calciferol. [1930–35] vitamin D3 n. a form of vitamin D, C27H43OH, occurring in fish-liver oils, that differs from vitamin D2 by slight structural differences in the molecule. Also called cholecalciferol. Random House Kernerman Webster's College Dictionary, © 2010 K ...
the skin. It will become vitamin D3 after irradiated by the light. It is also called cholecalciferol. D2 and D3 have similar structures. They are B ring derivatives of precursors of the sterol. The difference is that the side chain of vitamin D2 has a methyl group and one double bond...
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 ___. [ ]...