glutathione uric acid is sulfur based Glutathione is an antioxidant that's made up of the three amino acids— Glutathione - Wikipedia

And so the doctors, yeah, sure enough

There is a well-recognized phenomenon in gut-hormone pharmacology whereby a signal that potently slows gastric emptying on first exposure gradually loses that particular effect under continuous stimulation, even as its central appetite-suppressing effect persists

doi: 10.1016/j.cellimm.2020.104119 42 LuganoRRamachandranMDimbergA

3 RGN-259 Phase 3 Trial in Neurotrophic Keratopathy Sosne et al., International Journal of Molecular Sciences (2022) This Phase 3 randomized, placebo-controlled, double-masked clinical trial evaluated topical 0.1% RGN-259 (full-length recombinant T4 ophthalmic solution) in patients with neurotrophic keratopathy