Practically insoluble in water, freely soluble in ethanol , soluble in trimethylpentane and in fatty oils. It is sensitive to air, heat and light. Solutions in solvents without an antioxidant are unstable and are to be used immediately. A reversible isomerisation to pre-cholecalciferol takes place in solution, depending on temperature and time. The activity is due to both compounds.
Holick, Michael F. “Vitamin D and Bone Health.” The Journal of Nutrition, vol. 126, no. suppl_4, 1996, pp. 1159S-1164S. Crossref, doi:10.1093/jn/126.suppl_4.1159s.
1回顶部未来几天,今冬最强寒潮即将来袭,各位妈咪们还hold得住吗?面对呼啸的北风,很多妈妈都喜欢跟宝宝一起呆在温暖如春的室内。但室内的日子呆久了,宝宝日晒不足,体内的维生素D就要降到警戒值了。图片素材来源于华盖常言道,维生素D是宝宝健康的重要支柱。
母乳中维生素D含量较低,单纯靠母乳喂养不能满足婴儿对维生素D的需要,容易发生维生素D缺乏,严重的可发生佝偻病。因此为宝宝补充维生素D十分重要。市场上的维生素D补充剂种类很多,妈妈应该怎么选择呢?下面小编选择了4款常见的维生素D补充剂进行评测,看看它们各自都有哪些特点。
12.Pilz S, Tomaschitz A, Ritz E, Pieber TR. Vitamin D status and arterial hypertension: A systematic review. Nat Rev Cardiol. 2009;
Laura Tripkovic, Louise R Wilson, Kathryn Hart, et.al, Daily supplementation with 15 μg vitamin D2 compared with vitamin D3 to increase wintertime 25-hydroxyvitamin D status in healthy South Asian and white European women: a 12-wk randomized, placebo-controlled food-fortification trial, The American Journal of Clinical Nutrition, Volume 106, Issue 2, August 2017, Pages 481–490, 见原文链接。
见原文链接 Vitamin D and marine omega 3 fatty acid supplementation and incident autoimmune disease: VITAL randomized controlled trial。
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