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Vitamin D content of Beer
 Moderated by: Prof Trevor Marshall Page:  First Page Previous Page  1  2   
 

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Prof Trevor Marshall
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Joined: Fri Jul 9th, 2004
Location: Thousand Oaks, California USA
Posts: 15734
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 Posted: Wed Aug 1st, 2012 00:12

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Just a quick update, since I was hypothesizing, when this topic was first started, that it just didn't make sense for cells not be able to generate 25-D directly from the precursors, such as ergosterol and 7-dehydrocholesterol, without any sunlight exposure being necessary.

Since then our knowledge of Vit D metabolism has been turned on its head. There are a lot more enzymes producing 25-D than just CYP27A1, although exactly how everything works just gets more confusing with every discovery.

For example, "Regulation of human vitamin D(3) 25-hydroxylases in dermal fibroblasts and prostate cancer LNCaP cells"
http://www.ncbi.nlm.nih.gov/pubmed/19286836

At this point, I would rate the chances that the human body does not convert some ergosterol to vitamin D metabolites as close to zero...

NickBowler
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Joined: Wed Dec 20th, 2006
Location: Stirling, United Kingdom
Posts: 189
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 Posted: Tue Dec 18th, 2012 07:53

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Unfortunately the pushers have got wise to this concept - they will try to boost the levels in meat for human consumption too:
http://www.sciencedirect.com/science/article/pii/S0960076012002105



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