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doi: Seiwerth S, Brcic L, Vuletic L, et al

Journal of the National Cancer Institute (2003) 11

If you take combination therapy, which contains both T4 and T3, the medication needs to be taken precisely as prescribed, as taking too much can be dangerous

eLife (2019)

They are often combined with vitamin C to enhance absorption

Therefore, along with the theme of antioxidant and anti-inflammatory compounds, in this overview, we present three active ingredients for oral nutraceutical applications based upon market surveys and previous academic medical reports that indicate that collagen is the top or most widely sold active ingredient followed by antioxidants (especially those derived from natural products) such as curcumin and glutathione