Somatropin vs Tesamorelin
Overview
Somatropin is primarily a hormonal peptide, while Tesamorelin is used for performance & growth.
This page compares Somatropin and Tesamorelin across their primary use, typical dosing, reported benefits and side effects, and U.S. regulatory status. For the full monograph on either compound — mechanism of action, clinical research, and references — follow the article links.
Side-by-side comparison
| Somatropin | Tesamorelin | |
|---|---|---|
| Category | Hormonal | Performance & Growth |
| Regulatory status (US) | FDA approved | FDA approved |
| Typical dosage | 0.16-0.24 mg/kg/week (pediatric growth hormone deficiency); about 0.2 mg/day (adult growth hormone deficiency) | 2 mg |
| Frequency | daily subcutaneous injection | daily |
| Reported benefits | In labeled use, somatropin increases linear growth in children with growth failure from growth hormone deficiency, Turner syndrome, Prader-Willi syndrome, small size for gestational age and idiopathic short stature. In adults with diagnosed growth hormone deficiency, professional guidelines describe benefits in body composition, exercise capacity, skeletal integrity and quality-of-life measures, with the largest benefit in the most severely deficient patients. | Visceral fat reduction, improved body composition, GH release |
| Reported side effects | Fluid retention, edema, arthralgia and carpal tunnel syndrome are common in adults. Labeled warnings include glucose intolerance and new-onset diabetes, intracranial hypertension, slipped capital femoral epiphysis and scoliosis progression in children, hypothyroidism, hypoadrenalism, pancreatitis and hypersensitivity reactions. | Joint pain, peripheral edema |
Key differences
Primary use. Somatropin is categorised under Hormonal, while Tesamorelin falls under Performance & Growth. Their differing categories mean they are usually chosen for different goals rather than as direct substitutes.
Regulatory status. Somatropin: FDA-approved. Tesamorelin: FDA-approved.
Dosing. Somatropin is typically dosed at 0.16-0.24 mg/kg/week (pediatric growth hormone deficiency); about 0.2 mg/day (adult growth hormone deficiency) (daily subcutaneous injection). Tesamorelin is typically dosed at 2 mg (daily).
Can you stack them?
Some protocols combine peptides, but stacking Somatropin and Tesamorelin has not been validated for safety or efficacy in controlled trials. Combining compounds can change their effects and risks. Nothing here is medical advice — consult a qualified healthcare provider before starting or combining any protocol.
Frequently asked questions
- What is the difference between Somatropin and Tesamorelin?
- Somatropin is primarily a hormonal peptide, while Tesamorelin is used for performance & growth. Somatropin is FDA-approved for one or more indications, whereas Tesamorelin is FDA-approved for one or more indications.
- What is Somatropin used for?
- Recombinant human growth hormone, FDA-approved for growth failure in children and growth hormone deficiency in adults.
- What is Tesamorelin used for?
- GHRH for visceral fat.
- Can you take Somatropin and Tesamorelin together?
- Some users combine peptides within a single protocol, but stacking Somatropin and Tesamorelin has not been established as safe or effective in controlled trials. Neither this comparison nor PeptideSciences101 is medical advice — consult a qualified healthcare provider before combining any compounds.
- Is Somatropin or Tesamorelin FDA-approved?
- Somatropin is FDA-approved for one or more indications. Tesamorelin is FDA-approved for one or more indications.
Read the full articles
- Somatropin — full monograph: mechanism, research, dosing & references
- Tesamorelin — full monograph: mechanism, research, dosing & references