Study of almost 400,000 confirms that higher blood levels of IGF 1 are a risk factor for several types of cancer Cancer Epidemiology Unit (CEU) Largest study to date confirms role of two hormones in aggressive prostate cancer risk Cancer Epidemiology Unit (CEU) Is it safe for a teenager to take ipamorelin (growth hormone secretagogue) in small doses? 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