If you want the deeper mechanism, our explainer on what BPC-157 is and the tissue repair and angiogenesis mechanisms researchers believe give it its recovery reputation is a good place to start
Mannervik B, Awasthi YC, Board PG, Hayes JD, Di Ilio C, Ketterer B et al
Valerian extract alters functional brain connectivity: A randomized double-blind placebo-controlled trial
Besides its significant role as an antioxidant, glutathione has anti-inflammatory properties, helps regenerate other antioxidants, aids in DNA synthesis and repair, and supports immune response
Unlike many supplements, it has demonstrated direct effects on the GI tract , including accelerated healing of ulcers, improved intestinal barrier integrity, and protection against NSAID damage
2) Regression analysis of improvement in autistic symptoms with glutathione and metal excretion (especially thallium, arsenic, mercury, and lead) suggests most of the improvement was real (not due to a placebo effect), and thus suggests DMSA may have resulted in reduction of some symptoms of autism