just_some_guy65 t1_irwwp28 wrote
Reply to comment by just_some_guy65 in TIL A 2017 study found that the introduction of iodized salt in 1924 raised the IQ for the one-quarter of the population most deficient in iodine. by kstinfo
I gather there was a rather overwrought reply to this post of mine from now deleted user "modsarefascists42" alleging that I was upset about something, on re-reading I really can't see it. Anyhow as anyone who knows anything about the subject, not all papers and studies are created equal and a rather excellent resource called The Cochrane Library exists who do meta-analyses on the published research, carefully weeding out the dubious trials and poor methodology. So I have selected just two of their vitamin analyses - there are literally many dozens of these if you search their site.
https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD011906.pub2/full
> Vitamin and mineral supplementation for maintaining cognitive function in cognitively healthy people in mid and late life
> Authors' conclusions > We did not find evidence that any vitamin or mineral supplementation strategy for cognitively healthy adults in mid or late life has a meaningful effect on cognitive decline or dementia, although the evidence does not permit definitive conclusions
> Antioxidant supplements for prevention of mortality in healthy participants and patients with various diseases
> Authors' conclusions > We found no evidence to support antioxidant supplements for primary or secondary prevention. Beta‐carotene and vitamin E seem to increase mortality, and so may higher doses of vitamin A. Antioxidant supplements need to be considered as medicinal products and should undergo sufficient evaluation before marketing.
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