Do peptides affect male fertility or testosterone levels?

Some peptides like CJC-1295 may increase testosterone slightly. However, supraphysiological growth hormone can suppress natural testosterone production. If you're concerned about fertility, get baseline hormone testing and monitor levels during peptide use. <a href='https://www.nichd.nih.gov/health/topics/menshealth/conditioninfo/infertility' target='_blank'>NICHD Male Infertility</a>