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Peptides purchased online from unknown sources may not be tested for purity or safety

Muscle Function & Regeneration Research Studies show enhanced muscle stem cell activation in aged models with 2-fold larger myofiber cross-sections and 70% greater contractile force compared to controls

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Standard practice for short synthetic peptides applies: store the lyophilised powder cold and desiccated, protect from repeated freezethaw cycles once in solution, and account for the methionine residue, which is oxidation-prone and can complicate mass-spectrometric identity checks on aged stock