Potential side effects may include injection-site redness, swelling, bruising, itching, tenderness, small lumps, headache, fatigue, nausea, appetite changes, abdominal discomfort, stool changes, dizziness, altered sleep, mood changes, or feeling off. Allergic or immune reactions are also possible, and the FDA has specifically raised concerns about immunogenicity and peptide-related impurities in compounded BPC-157
For example: BPC-157 (notes immunogenicity risk, impurity/characterization complexity, limited safety info) (U.S
Note: This compound is strictly for in-vitro laboratory research use only and is not for human consumption, diagnostic, or therapeutic purposes
Overall, glutathione is generally well tolerated, its most common side effects are mild and form-dependent, and the serious ones are rare and tied mainly to high, unregulated dosing