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Key Takeaway: L-glutathione and reduced glutathione both refer to the active, antioxidant form of the molecule (GSH) that is ready to support your body's defense systems

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Scientific and Official Sources PubChem: BPC-157 identity, synonyms, molecular formula and mass Sikiric and colleagues: early published BPC-157 research ClinicalTrials.gov: PCO-02 BPC-157 safety and pharmacokinetics study Lee and colleagues: two-participant BPC-157 intravenous pilot study McGuire and colleagues: narrative review of BPC-157 evidence and risk World Anti-Doping Agency: 2026 Prohibited List MHRA: Borderline products and how to tell if a product is a medicine Human Medicines Regulations 2012: Regulation 279 United States FDA: safety risks associated with certain bulk substances, including BPC-157 United States FDA: BPC-157-related bulk-substance briefing document CAP Code Section 12: Medicines and health-related products Health and Safety Executive: UK REACH Health and Safety Executive: Safety Data Sheets and COSHH Health and Safety Executive: COSHH risk assessment Cox and colleagues: identification and analytical detection of BPC-157 in confiscated material