CJC 1295 Peptide: Benefits, Dosing, Side Effects & Ipamorelin Efficacy of Ipamorelin, a Novel Ghrelin Mimetic, in a Rodent Model of Postoperative Ileus ScienceDirect Peptides are often well tolerated, but they can still cause temporary reactions while the body adapts. Some commonly reported effects include: BPC 157 headaches, nausea, increased appetite TB 500 Tesamorelin & Ipamorelin Blend: Research Peptides from Peptides Source