Best Peptides for Hormone Optimization: Ranked by Evidence (2026)
Hormone-axis peptides act on growth hormone or reproductive hormones. Several, such as tesamorelin, hCG and gonadorelin, have approved products for specific diagnoses; most GH secretagogues sold online do not. The ordering below is by strength of evidence and regulatory status, not by brand.
The ranking
| Compound | FDA status | Evidence level | PubMed papers | Tagged trials |
|---|---|---|---|---|
| Oxytocin | FDA-approved | FDA-approved product | 29,398 | 2,422 |
| hCG | FDA-approved | FDA-approved product | 19,493 | 780 |
| Triptorelin | FDA-approved | FDA-approved product | 1,005 | 254 |
| Somatropin | FDA-approved | FDA-approved product | 420 | 72 |
| Gonadorelin | FDA-approved (diagnostic/veterinary) | FDA-approved product | 297 | 25 |
| Tesamorelin | FDA-approved | FDA-approved product | 95 | 23 |
| hMG | FDA-approved | FDA-approved product | 107 | 13 |
| Sermorelin | Approved, discontinued | Previously approved | 25 | 0 |
| ACE-031 | Investigational (development stopped) | Clinical trials / approved abroad | 12 | 2 |
| GHRH | Natural hormone (analogs approved) | Preclinical or minimal | 2,508 | 181 |
| Follistatin-315 | Not approved (research only) | Preclinical or minimal | 2,974 | 90 |
| Follistatin | Not approved (research only) | Preclinical or minimal | 2,974 | 90 |
| Hexarelin | Not approved (research only) | Preclinical or minimal | 291 | 58 |
| GHRP-6 | Not approved (research only) | Preclinical or minimal | 639 | 42 |
| Kisspeptin-10 | Not approved (research only) | Preclinical or minimal | 317 | 9 |
| MGF | Not approved (research only) | Preclinical or minimal | 194 | 6 |
| MK-677 | Not approved (research only) | Preclinical or minimal | 30 | 3 |
| Ipamorelin | Not approved (research only) | Preclinical or minimal | 51 | 2 |
| CJC-1295 | Not approved (research only) | Preclinical or minimal | 35 | 2 |
| GHRP-2 | Not approved (research only) | Preclinical or minimal | 15 | 0 |
| Follistatin-344 | Not approved (research only) | Preclinical or minimal | 5 | 0 |
| HGH fragment 176-191 | Not approved (research only) | Preclinical or minimal | 1 | 0 |
| PEG-MGF | Not approved (research only) | Preclinical or minimal | 1 | 0 |
| IGF-1 LR3 | Not approved (research only) | Preclinical or minimal | — | — |
Why each of the top 6 ranks where it does
1. Oxytocin
FDA-approved product: FDA-approved; OXYTOCIN. PubMed lists 29,398 records (2,422 tagged as clinical trials) and ClinicalTrials.gov 935 registered studies. A recent review: The physiology and pharmacology of oxytocin in labor and in the peripartum period. (Am J Obstet Gynecol, 2024). Registered study: NCT07425938 (na), recruiting.
2. hCG
FDA-approved product: FDA-approved; CHORIONIC GONADOTROPIN. PubMed lists 19,493 records (780 tagged as clinical trials) and ClinicalTrials.gov 413 registered studies. A recent review: Human Chorionic Gonadotropin and Early Embryogenesis: Review. (Int J Mol Sci, 2022). Registered study: NCT06280560, recruiting.
3. Triptorelin
FDA-approved product: FDA-approved; TRELSTAR. PubMed lists 1,005 records (254 tagged as clinical trials) and ClinicalTrials.gov 298 registered studies. A recent review: Triptorelin for the treatment of endometriosis. (Expert Opin Pharmacother, 2014). Registered study: NCT07187947, recruiting.
4. Somatropin
FDA-approved product: FDA-approved; NORDITROPIN, NORDITROPIN FLEXPRO, NORDITROPIN NORDIFLEX. PubMed lists 420 records (72 tagged as clinical trials) and ClinicalTrials.gov 818 registered studies. A recent trial report: Efficacy and Safety of Weekly Somatrogon vs Daily Somatropin in Children With Growth Hormone Deficiency: A Phase 3 Study. (J Clin Endocrinol Metab, 2022). Registered study: NCT07359625 (na), recruiting.
5. Gonadorelin
FDA-approved product: FDA-approved (diagnostic/veterinary). PubMed lists 297 records (25 tagged as clinical trials) and ClinicalTrials.gov 1164 registered studies. A recent review: Menorrhagia. (BMJ Clin Evid, 2012). Registered study: NCT06868576 (phase3), completed.
6. Tesamorelin
FDA-approved product: FDA-approved; EGRIFTA. PubMed lists 95 records (23 tagged as clinical trials) and ClinicalTrials.gov 24 registered studies. A recent review: Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions. (J Am Acad Orthop Surg Glob Res Rev, 2026). Registered study: NCT03150511 (phase2), recruiting.
With an FDA-approved product
- Oxytocin — FDA-approved; OXYTOCIN
- hCG — FDA-approved; CHORIONIC GONADOTROPIN
- Triptorelin — FDA-approved; TRELSTAR
- Somatropin — FDA-approved; NORDITROPIN, NORDITROPIN FLEXPRO, NORDITROPIN NORDIFLEX
- Gonadorelin — FDA-approved (diagnostic/veterinary)
- Tesamorelin — FDA-approved; EGRIFTA
- hMG — FDA-approved; MENOPUR
Where to go next
Overview of the category: Hormone Optimization peptide therapy. Prescribers: clinic directory. Seller facts and prices: vendor directory and price tracker.
Frequently asked questions
Which hormone optimization peptides are FDA-approved?
Oxytocin, hCG, Triptorelin, Somatropin, Gonadorelin, Tesamorelin, hMG have an FDA-approved product, each for a specific labeled indication — not necessarily for hormone optimization in general.
How is this list ordered?
By regulatory status first (FDA-approved, previously approved, in clinical trials or approved abroad, preclinical), then by the number of PubMed-indexed clinical-trial papers. It ranks evidence, not sellers, and no company can pay to change the order.
Can I buy these online?
FDA-approved drugs require a prescription. Products sold as "research peptides" are labeled not for human use and are not FDA-approved; see each compound page for its status and our vendor directory for documented facts about sellers.