>>11379424 LB
might have misread some things, but so far, seems inconclusive.
… some medical practitioners are concerned that it may reduce the natural production of melatonin in the body, but short-term studies suggest no such effects (7, 8, 9)…
https://pubmed.ncbi.nlm.nih.gov/9062869/
https://pubmed.ncbi.nlm.nih.gov/3742833/
https://pubmed.ncbi.nlm.nih.gov/14582858/
all pubmed links suggest no long term issues.
I can't find the source now, or even if it was truly reputable. I was looking into thyroid and hormone function and stumbled across that tidbit. so grain of salt it.