However, the side effects are not predictable and anyone can suffer at any time, while some people may not face any problems at all
Many preclinical studies have demonstrated that the expression of key enzymes for GSH synthesis (GCL, SLC7A11, GS) and GSSG reduction-related enzymes (G6PD, NADPH, and GR) is downregulated in myocardium exposed to pathological factors [40, 43,44,45,46,47,48,49,50]
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mechanism unexplained Relative contributions of direct peptide effects versus downstream IGF-1 actions inadequately characterized Long-term receptor sensitivity and potential for desensitization inadequately studied Individual patient variability in response not well-characterized Potential for differential effects based on endogenous growth hormone status unclear Long-Term Safety Considerations Critical safety questions remain unanswered regarding chronic peptide administration: Cardiovascular safety concerns FDA warnings cite risks of increased heart rate, systemic vasodilation, flushing, and transient hypotension Immunogenicity risks FDA identifies both peptides as potentially immunogenic with risk of serious immune reactions including anaphylaxis Cancer risk theoretical concern that chronic growth hormone/IGF-1 elevation could promote cellular proliferation
Mol Brain Res 24: 336340
Comput Biol Chem
