Earlier quoted context omitted.
Hi, author of the blog post here! Thank you for writing in with your concerns. First: > Please be very careful when someone tries to tell you that supplements are miraculous and pharmaceutical drugs don’t work at all. I'll concede I unintentionally gave the tone that one should replace antidepressants with supplements, even though the conclusion specifically writes: "(Don't quit your existing antidepressants if they'…
> Researchers have noticed it for 13 years! From the linked Ghaemi et al 2024 meta-analysis You’re cherry picking papers. Others have already shared other studies showing no significant effects of Vitamin D intervention. For any popular supplement you can find someone publishing papers with miraculous results, showing huge effect sizes and significant outcomes. This has been going on for decades. With Omega-3s the la…
I just picked the most recent meta-analysis I could find, which also specifically estimates the dose-response curve. (Since averaging the effect at 400 IU and 4000 IU doesn't make sense.)
> Others have already shared other studies showing no significant effects of Vitamin D intervention.
Yes, and the Ghaemi et al 2024 meta-analysis addresses the methodological problems in those earlier meta-analyses. (For example, they average the effects at vastly varying doses from 400 IU and 4000 IU)
> According your numbers, taking Tylenol would be worse than placebo alone! 0.4 vs 0.7
No, I understand this fine. Taking Tylenol would give you active medication + placebo + time, which is 0.4 + 0.7 + X > *1.1.* Taking open-label placebo is just placebo + time = *0.7* + X.
(Edit: Also, these aren't "my" numbers. They're from a major peer-reviewed study published in Nature, the highest-impact journal. I don't like "hey look at the credentials here", but I bring it up to note I'm not anti-science, see below paragraph)
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Stepping back, I suspect the broader concern you have is you (correctly!) see that supplement/nutrition research is sketchy & full of grifters. And at the current moment, it seems to play into the hands of anti-establishment anti-science types. I agree, and I'll try to edit the tone of the article to avoid that.
That said, there still is some good science (among the crap), and I think the better evidence is accumulating (at least for Vitamin D) that it's on par with traditional antidepressants, possibly more. I agree that much larger trials are required.