oral glutathione skin whitening randomized trial in Aging and Tissue Regeneration: A Systematic Review of Molecular Mechanisms, Redox Modulation, and Biomedical Implications glutathione skin whitening clinical trial
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doi: 10.1212/WNL.0b013e31823a0ee4

HPLC Analytical Verification Confirmed 99% Purity for Accurate Experimental Results
Adjuvant chemotherapy was administered to 120 patients, hormone therapy was administered to 173 patients and both treatments to 104 patients

Catalase can also use H2O2 in order to detoxify some toxic substances via a peroxidase reaction (Mayo et al., 2003)

JAMA, 320(24), 2564

Even a single amino acid substitution can dramatically alter the peptide's properties and render it ineffective
