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Summary Keywords endocrinology, growth hormone secretagogues, IGF-1 analogues, off-label use, peptide hormones, performance-enhancing drugs, sports doping Citation Dominikowski A, Rko Z, Olejarz M, Szczepanek-Parulska E, Domin R and Ruchaa M (2026) The emerging landscape of performance-enhancing peptides modulating GH-IGF1 axis: bridging the gap between clinical evidence and patient self-administration

For intramuscular injections, your nurse or doctor will tell you the best sites for you because an exact location must be used and some sites may be difficult to reach if you are giving the injection to yourself

metabolic regulation research Key Research References Ng FM et al

could occur in massive overdose or elderly patients)

However, it does serve as a proof-of-concept that broadly targeting immunity exists, thus suggesting potential routes of induction, which can be experimentally tested