CJC 1295 for penis growth: what the evidence shows and what to consider TESAMORELIN vs. CJC 1295: Key Comparisons Explained Why RFK Jr. backs peptides but questions vaccines STAT Some peptides can be risky if someone has active or recent cancer. Peptides that raise growth hormone or IGF 1, like IGF 1 LR3, IGF 1 DES, Tesamorelin, Sermorelin, CJC 1295, and Ipamorelin, increase growth signals