A few. Ever hear of HPV? It's a sexually transmitted disease that half of all sexually active adults in North America have. It can manifest as genital warts (for some strains) in men, and cervical cancer in women.
IGF-1 will make all cells grow. All cells.
Got HPV? If so, and if you're a woman, taking GH or IGF-1 can increase your chances of dying. If you have HPV and are a man, it can intensify the outbreak of genital warts.
And remember, half of all sexually active N.Americans have HPV, but most don't know it.