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Peptide Therapy MD

Studies, reviews and safety material

The clinical disagreements become easier to see when the relevant papers are read together.

Thymosin alpha-1 sources

The pair that anchors this site is ETASS, the earlier severe-sepsis trial, followed by TESTS, the larger double-blinded sepsis trial. The retrospective COVID-19 study asks a related immune question with a different population and design. The comprehensive thymosin alpha-1 review supplies clinical context, and the oncology reappraisal considers combination treatment.

Metabolic results

For tesamorelin, the pivotal HIV-related abdominal-fat trial, visceral- and liver-fat trial and longer follow-up are useful companions. The meta-analysis brings trial results together; LiverTox addresses drug safety and the approved indication.

Retatrutide has separate obesity, type 2 diabetes and liver-fat trial reports. I give those clinical papers priority over a broad description of the molecule's promise.

Mechanism and the small human repair record

The retatrutide receptor study and tesamorelin hormone study investigate how the compounds act. For BPC-157, the two-person safety pilot and musculoskeletal narrative review reveal the size of the human evidence, alongside the rat gastric-ulcer experiment, cell and animal vascular work and rat and dog pharmacokinetic study. The sports-medicine review addresses wider safety and antidoping concerns.

  1. Badran AS, et al. Body composition, hepatic fat, metabolic, and safety outcomes of Tesamorelin, a GHRH analogue, in HIV-associated lipodystrophy: A meta-analysis of randomized controlled trials. Obesity Research & Clinical Practice. 2026;20(1):2-12. ↗
  2. National Institute of Diabetes and Digestive and Kidney Diseases (LiverTox). Tesamorelin - LiverTox: Clinical and Research Information on Drug-Induced Liver Injury. NCBI Bookshelf (NIH). 2018. ↗
  3. Stanley TL, Feldpausch MN, Oh J, Branch KL, Lee H, Torriani M, Grinspoon SK. Effect of tesamorelin on visceral fat and liver fat in HIV-infected patients with abdominal fat accumulation: a randomized clinical trial. JAMA. 2014;312(4):380-389. ↗
  4. Stanley TL, Chen CY, Branch KL, Makimura H, Grinspoon SK. Effects of a growth hormone-releasing hormone analog on endogenous GH pulsatility and insulin sensitivity in healthy men. Journal of Clinical Endocrinology and Metabolism. 2011;96(1):150-158. ↗
  5. Falutz J, Allas S, Mamputu JC, Potvin D, Kotler D, Somero M, Berger D, Brown S, Richmond G, Fessel J, Turner R, Grinspoon S. Long-term safety and effects of tesamorelin, a growth hormone-releasing factor analogue, in HIV patients with abdominal fat accumulation. AIDS. 2008;22(14):1719-1728. ↗
  6. Falutz J, Allas S, Blot K, Potvin D, Kotler D, Somero M, Berger D, et al. Metabolic effects of a growth hormone-releasing factor in patients with HIV. New England Journal of Medicine. 2007;357(23):2359-2370. ↗
  7. Villegas Meza AD, et al. Injectable Peptides in Sports Medicine: A Structured Narrative Review of Evidence, Safety, and Antidoping Implications. JBJS reviews. 2026;14. ↗
  8. Katsi V, Koutsopoulos G, Fragoulis C, Dimitriadis K, Tsioufis K. Retatrutide-A Game Changer in Obesity Pharmacotherapy. Biomolecules. 2025;15:796. ↗
  9. Li W, Zhou Q, Cong Z, Yuan Q, Li W, Zhao F, Xu HE, Zhao LH, Yang D, Wang MW. Structural insights into the triple agonism at GLP-1R, GIPR and GCGR manifested by retatrutide. Cell Discovery. 2024;10:77. ↗
  10. Sanyal AJ, Kaplan LM, Frias JP, Brouwers B, Wu Q, Thomas MK, Harris C, Schloot NC, Du Y, Mather KJ, Haupt A, Hartman ML. Triple hormone receptor agonist retatrutide for metabolic dysfunction-associated steatotic liver disease: a randomized phase 2a trial. Nature Medicine. 2024;30:2037-2048. ↗
  11. Jastreboff AM, et al. Triple-Hormone-Receptor Agonist Retatrutide for Obesity - A Phase 2 Trial. N Engl J Med. 2023;389(6):514-526. ↗
  12. Rosenstock J, et al. Retatrutide, a GIP, GLP-1 and glucagon receptor agonist, for people with type 2 diabetes: a randomised, double-blind, placebo and active-controlled, parallel-group, phase 2 trial. Lancet. 2023;402(10401):529-544. ↗
  13. Lee E, Burgess K. Safety of Intravenous Infusion of BPC157 in Humans: A Pilot Study. Altern Ther Health Med. 2025. ↗
  14. McGuire FP, et al. Regeneration or Risk? A Narrative Review of BPC-157 for Musculoskeletal Healing. Curr Rev Musculoskelet Med. 2025. ↗
  15. He L, et al. Pharmacokinetics, distribution, metabolism, and excretion of body-protective compound 157, a potential drug for treating various wounds, in rats and dogs. Front Pharmacol. 2022;13:1026182. ↗
  16. Hsieh MJ, et al. Therapeutic potential of pro-angiogenic BPC157 is associated with VEGFR2 activation and up-regulation. J Mol Med (Berl). 2017;95:323-333. ↗
  17. Xue XC, et al. Protective effects of pentadecapeptide BPC 157 on gastric ulcer in rats. World J Gastroenterol. 2004;10:1032-1037. ↗
  18. Wu J, Pei F, Zhou L, et al. The efficacy and safety of thymosin alpha1 for sepsis (TESTS): multicentre, double blinded, randomised, placebo controlled, phase 3 trial. BMJ. 2025. ↗
  19. Dominari A, Hathaway Iii D, Pandav K, et al. Thymosin alpha 1: A comprehensive review of the literature. World J Virol. 2020. ↗
  20. Liu Y, Pan Y, Hu Z, et al. Thymosin Alpha 1 Reduces the Mortality of Severe Coronavirus Disease 2019 by Restoration of Lymphocytopenia and Reversion of Exhausted T Cells. Clin Infect Dis. 2020. ↗
  21. Costantini C, Bellet MM, Pariano M, et al. A Reappraisal of Thymosin Alpha1 in Cancer Therapy. Front Oncol. 2019. ↗
  22. Wu J, Zhou L, Liu J, et al. The efficacy of thymosin alpha 1 for severe sepsis (ETASS): a multicenter, single-blind, randomized and controlled trial. Crit Care. 2013. ↗