s-acetyl glutathione uses The benefits of supplementation | Liposomal Formulations Glutathione: Benefits and Supplements

Jackisch L, Kumsaiyai W, Moore JD, Al-Daghri N, Kyrou I, Barber TM, Randeva H, Kumar S, Tripathi G, McTernan PG

B12 deficiency symptoms can be chalked up simply to aging

The injectable route makes more sense for wound healing and skin remodeling protocols where systemic distribution is the goal

The specific concerns were not fully detailed publicly but likely related to the limited US-standard clinical trial data and the peptide's widespread use exceeding the evidence base recognized by FDA standards

However, high amounts may cause nausea, vomiting, diarrhea, and constipation

Miller JW, Garrod MG, Allen LH, Haan MN, Green R