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The relative BA of the intranasally administered TCTP-PTD 13M2/insulin mixture supplemented with 100 nM Arg HCl and 16 mg/ml glycerin was 58% and that of TCTP-PTD 13M2/insulin containing 25 mM Arg HCl and 1 w/v% sucrose was 53%, relative to the BA of one that was administered subcutaneously (Kim et al., 2019)

This leads to various benefits, including: Improved muscle mass and strength: Stimulating growth hormone aids in the rapid building of muscle mass and increasing physical strength

As of 2026 it has not received MHRA or European Medicines Agency (EMA) approval, but is already being marketed online without legal authorisation

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