glutathione eye drops eye color change scientific evidence Color-changing drops: Are they safe? Drops That Change Eye Color?

2013 Nov 1;13(23):1-45

However, at least at the cellular level, direct evidence is needed for the relationship between the action of the studied active compounds and metallothioneins, the dissociation of Zn(II) ions, and their impact on specific signaling pathways

By accelerating the repair process and enhancing collagen production and the quality of newly formed tissues, BPC-157 supports the restoration of normal function and strength in damaged tissues

What works beautifully for one might not be the right fit for another

Some evidence: A randomized controlled study with 250 mg/day (reduced or oxidised form) over 12 weeks found that melanin index and UV-spots tended to be lower vs placebo