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The two papers that originally established this mechanism have been retracted

Growth hormone receptor expression in tendons: Preclinical work has shown BPC-157 increases GH receptor expression in tendon fibroblasts, which may explain its strong effect on tendon-to-bone healing

NNMT consumes both nicotinamide (an NAD+ precursor) and SAM (the universal methyl donor) to produce MNA

Collagen synthesis and extracellular matrix remodelling research

Supplied As Supplied as a lyophilized 10mg vial, suitable for standard laboratory reconstitution procedures performed by trained personnel for research purposes

But this comes at a cost