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Rosado C, Silva C, Reis CP

Anti-Aging Potentials of Methylene Blue for Human Skin Longevity found Methylene blue benefits the skin by cleaning up damaged free radicals, helps skin grow, thicken skin, boost collagen and help heal wounds through protecting the cells from oxidative stress

Its a synthetic peptide derived from a protective protein found in your gut

Furthermore, a 2-year, double-blind, randomized, placebo-controlled therapeutic trial in 158 healthy siblings of hyperhomocysteinemic patients with premature atherothrombotic disease folic acid plus vitamin B 6 treatment was associated with a decreased occurrence of abnormal exercise electrocardiography tests, which is consistent with a decreased risk of atherosclerotic events (Vermeulen et al, 2000)