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Henry Mance
@henrymance.ft.com

... Recent studies say it's not true! See this from Xand Van Tulleken's Make Me Well:

3 reposts23 likes

Meg Howarth
@howarthm.bsky.social

#VitaminD increases dietary #calcium absorption. Failure to prevent #osteoporosis/ osteoporotic #fractures, surely, may be due to other factors, eg lack of weight-bearing exercise?

Andy Robinson
@andycayenne.bsky.social

Hmm. Van Tulken’s kinda comparing apples and oranges. Vitamin D primarily comes from exposing skin to UV in sunlight, which means you need to control for things like climate, skin colour, and sunscreen. So results from Australia and South Africa don’t necessarily apply to, say, the north of the UK.

Andy Robinson
@andycayenne.bsky.social

I haven’t, so I’m aware I might be nitpicking and/or looking at this out of context to some extent. If his point is that Vit D is oversold (esp in very big doses) then he’s right, but there definitely is a case for reasonable supplements over winter in Northern Europe etc.