What the evidence says. Unapproved, WADA-prohibited injectables whose benefits rest almost entirely on animal studies (mostly from one lab) plus three tiny uncontrolled human pilots totalling under 30 people; as sold online, unverified quality and unknown safety outweigh unproven benefit. (Banned / Harmful evidence: Linked to serious harm and/or banned in sport and many jurisdictions. Listed for awareness and safety only — NOT a recommendation.)
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Health warning. BPC-157 and TB-500 are unapproved injectable drugs with almost no human safety data, are banned in sport, and 'research use only' vials are unregulated for identity, dose and sterility.
What is BPC-157 & TB-500?
BPC-157 & TB-500 (Body Protection Compound-157; Thymosin β4 fragment) is a performance supplement marketed for faster tendon, ligament and muscle healing. NutriDex grades the human evidence as Banned / Harmful. BPC-157 is a synthetic 15-amino-acid peptide based on a protein found in stomach juice; TB-500 is a synthetic fragment of thymosin β4. Both are injected, often together as the 'Wolverine stack', to speed healing of tendons, muscles and joints. In rats BPC-157 has repeatedly improved tendon, muscle, bone and gut injuries, but most of this work comes from a single research group, and a 2025 systematic review found 35 preclinical studies and just one clinical study. Human data amount to three small uncontrolled pilots: knee pain, bladder pain, and an IV safety test in two people. TB-500 itself has no human trials; only the full-length thymosin β4 protein has been tested, in small drug-development studies. FDA placed BPC-157 in 503A Category 2 in 2023 and removed it, with eleven other peptides, on 15 April 2026 without moving it to Category 1. In July 2026 an FDA advisory committee voted 8-6 to allow compounding, against FDA staff advice; rulemaking is pending, so it remains an unapproved drug in a gray zone. Both are banned in sport.
Marketed Claims (unproven)
✕(Claimed) faster tendon, ligament and muscle healing
✕(Claimed) gut, ulcer and bowel healing
✕(Claimed) less joint pain and inflammation
✕(Claimed) quicker return from sports injury
Dosing & Compounds
Use & Legality
No established safe human dose. Neither BPC-157 nor TB-500 is an FDA-approved drug, and products labelled 'research use only' are not intended for people.
Active Compounds
BPC-157 (synthetic 15-amino-acid peptide from a gastric protein fragment)TB-500 (synthetic acetylated 17-23 fragment of thymosin β4)Thymosin β4 (full 43-amino-acid protein, studied only as an investigational drug)
Safety & Cautions
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There are no adequate human safety data; theoretical concerns include stimulating blood-vessel growth (angiogenesis) in undiagnosed tumours and unknown long-term effects. 'Research use only' vials sold online are not made to pharmaceutical standards, so identity, dose, sterility and endotoxin content are unverified, and self-injection carries infection risk. Both are prohibited by WADA at all times (BPC-157 under S0 non-approved substances, TB-500 under S2 as a thymosin β4 derivative), so tested athletes risk sanctions. Avoid entirely in pregnancy, with any cancer history, and when combined with other unregulated peptides. Educational only — always check with your doctor or pharmacist before combining BPC-157 & TB-500 with any medicine.
BPC-157 & TB-500 is most often marketed for (Claimed) faster tendon, ligament and muscle healing, (Claimed) gut, ulcer and bowel healing, (Claimed) less joint pain and inflammation, (Claimed) quicker return from sports injury. Hyped 'healing peptides' with rodent data and no human proof
Does BPC-157 & TB-500 work — what does the evidence say?
Banned / Harmful evidence. Linked to serious harm and/or banned in sport and many jurisdictions. Listed for awareness and safety only — NOT a recommendation. BPC-157 is a synthetic 15-amino-acid peptide based on a protein found in stomach juice; TB-500 is a synthetic fragment of thymosin β4. Both are injected, often together as the 'Wolverine stack', to speed healing of tendons, muscles and joints. In rats BPC-157 has repeatedly improved tendon, muscle, bone and gut injuries, but most of this work comes from a single research group, and a 2025 systematic review found 35 preclinical studies and just one clinical study. Human data amount to three small uncontrolled pilots: knee pain, bladder pain, and an IV safety test in two people. TB-500 itself has no human trials; only the full-length thymosin β4 protein has been tested, in small drug-development studies. FDA placed BPC-157 in 503A Category 2 in 2023 and removed it, with eleven other peptides, on 15 April 2026 without moving it to Category 1. In July 2026 an FDA advisory committee voted 8-6 to allow compounding, against FDA staff advice; rulemaking is pending, so it remains an unapproved drug in a gray zone. Both are banned in sport.
What is the typical dose of BPC-157 & TB-500?
No established safe human dose. Neither BPC-157 nor TB-500 is an FDA-approved drug, and products labelled 'research use only' are not intended for people.
Is BPC-157 & TB-500 safe? Any cautions or side effects?
There are no adequate human safety data; theoretical concerns include stimulating blood-vessel growth (angiogenesis) in undiagnosed tumours and unknown long-term effects. 'Research use only' vials sold online are not made to pharmaceutical standards, so identity, dose, sterility and endotoxin content are unverified, and self-injection carries infection risk. Both are prohibited by WADA at all times (BPC-157 under S0 non-approved substances, TB-500 under S2 as a thymosin β4 derivative), so tested athletes risk sanctions. Avoid entirely in pregnancy, with any cancer history, and when combined with other unregulated peptides.
Peh, D. (2026). BPC-157 & TB-500 (Body Protection Compound-157; Thymosin β4 fragment): Benefits, Dosage, Side Effects & Evidence. NutriDex — The Supplement Research Compendium. Retrieved 18 Oct 2026, from https://nutridex.info/s/bpc-157
BibTeX
@misc{nutridex_bpc_157,
author = {Peh, Daryl},
title = {BPC-157 \& TB-500 (Body Protection Compound-157; Thymosin β4 fragment): Benefits, Dosage, Side Effects \& Evidence},
year = {2026},
howpublished = {NutriDex --- The Supplement Research Compendium},
url = {https://nutridex.info/s/bpc-157},
note = {Reviewed by Dr Daryl Peh, MBBS Singapore, MMed FM. Accessed 2026-10-18}
}
For medical claims, citing the underlying primary studies linked above is preferred. NutriDex is an educational reference, not medical advice.