Tesamorelin vs YK-11
Overview
Tesamorelin and YK-11 are both performance & growth peptides, but they differ in mechanism, dosing, and regulatory status.
This page compares Tesamorelin and YK-11 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
| Tesamorelin | YK-11 | |
|---|---|---|
| Category | Performance & Growth | Performance & Growth |
| Regulatory status (US) | FDA approved | Research use only |
| Typical dosage | 2 mg | Research protocols |
| Frequency | daily | varies |
| Reported benefits | Visceral fat reduction, improved body composition, GH release | Muscle growth beyond genetic limits |
| Reported side effects | Joint pain, peripheral edema | Limited human studies |
Key differences
Primary use. Tesamorelin is categorised under Performance & Growth, while YK-11 falls under Performance & Growth. Because they target a similar goal, they are common alternatives to weigh against each other.
Regulatory status. Tesamorelin: FDA-approved. YK-11: not FDA-approved; treated as a research compound.
Dosing. Tesamorelin is typically dosed at 2 mg (daily). YK-11 is typically dosed at Research protocols (varies).
Can you stack them?
Some protocols combine peptides, but stacking Tesamorelin and YK-11 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 Tesamorelin and YK-11?
- Tesamorelin and YK-11 are both performance & growth peptides, but they differ in mechanism, dosing, and regulatory status. Tesamorelin is FDA-approved for one or more indications, whereas YK-11 is not FDA-approved; generally classified as a research compound.
- What is Tesamorelin used for?
- GHRH for visceral fat.
- What is YK-11 used for?
- Myostatin inhibitor.
- Can you take Tesamorelin and YK-11 together?
- Some users combine peptides within a single protocol, but stacking Tesamorelin and YK-11 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 Tesamorelin or YK-11 FDA-approved?
- Tesamorelin is FDA-approved for one or more indications. YK-11 is not FDA-approved; generally classified as a research compound.
Read the full articles
- Tesamorelin — full monograph: mechanism, research, dosing & references
- YK-11 — full monograph: mechanism, research, dosing & references