Collagen Supplements

Anyone know if Collagen Supplements mess with TSH levels on test? I read another post here about Biotin affects the tsh.

Thanks

[SeasideSusie Remembering]

I don't know about collagen supplements, but the problem with Biotin is that some labs use biotin in the assays, and in which case taking a biotin supplement will give false results. So as we don't know which labs use biotin in their assays, it's best to not take any supplement containing biotin for 3-5 days before testing - not just thyroid tests but for any blood test.