Some users experience side effects like: Nausea or dizziness Headaches Fatigue Local irritation with injections These are typically mild and dose-dependent
These include people with active cancer (any type), people who are pregnant or planning pregnancy, anyone with a known allergy to tesamorelin or mannitol (an inactive ingredient), and people with major problems of the hypothalamus or pituitary gland (the brain area that controls hormone release)
They typically improve by week three or four
You can also eat prebiotic foods to feed your healthy gut bacteria (OConnor, 2025): Garlic, onions, leeks Asparagus, Jerusalem artichokes Bananas, oats, apples 6
Most studies do also report a wide range of negative side effects including nausea and vomiting
Additionally, a higher percentage of women in the treatment group had available cryopreserved embryos (18.42% vs 4.3%) (Xu et al., 2018)