Do certain genetic variations affect peptide safety or response?

Genetic polymorphisms in growth hormone receptors or metabolic enzymes may affect peptide response, but genetic testing for peptide use isn't standard. If you have known genetic conditions affecting metabolism (e.g., MTHFR), discuss with a genetics-informed physician. <a href='https://www.genome.gov/genetics-glossary/Pharmacogenomics' target='_blank'>NIH Pharmacogenomics</a>