ühine nimetus steroidse struktuuriga vitamiinide kohta, mis parandavad kaltsiumi ja fosfori imendumist soolest, osalevad luustiku moodustumisel ja väldivad rahhiiti
a fat-soluble vitamin that enhances the absorption of calcium and phosphorus from the intestine and promotes their deposition in the bone
D-vitamiini omastame vaid loomse päritoluga toiduainetest (kalaõli, munakollane, maks, või, pärm). Teatud hulgal moodustub D-vitamiin ultraviolettkiirguse toimel ka inimese nahas.
A deficiency of vitamin D, either from a poor diet or lack of sunlight, leads to decalcified bones and the development of rickets and osteomalacia. Good sources of vitamin D are liver and fish oils.
Hea teada
It occurs in two forms: ergocalciferol (vitamin D2, calciferol), which is manufactured by plants when the sterol ergosterol is exposed to ultraviolet light, and cholecalciferol (vitamin D3), which is produced by the action of sunlight on 7-dehydrocholesterol, a sterol widely distributed in the skin.
