BPC-157 vs TB-500
Both are unapproved peptides studied mainly in animals for tissue healing. BPC-157 is a fragment of a gastric-juice protein; TB-500 is a synthetic relative of thymosin beta-4, which helps cells move into injured tissue. BPC-157 has a few small human reports. For TB-500, the FDA identified no human exposure data.[1,2,3]
7 sources, every number linked. PepDose sells no peptides and takes no vendor money.
At a glance
How do BPC-157 and TB-500 compare?
No study has compared BPC-157 with TB-500, in animals or in people. Almost all of the evidence for both is from animal and lab work.
| BPC-157 | TB-500 | |
|---|---|---|
| What it is[1,2] | BPC-157A 15-amino-acid fragment of a protein found in gastric juice | TB-500A synthetic peptide related to thymosin beta-4, a natural 43-amino-acid protein |
| Proposed mechanism[1,4,2] | BPC-157More growth hormone receptor expression, new blood vessel growth, lower inflammatory signals | TB-500Binds actin, helps cells migrate into damaged tissue, supports new blood vessels |
| Evidence level | BPC-157Animal and lab data | TB-500Animal and lab data |
| Key animal finding[1,5] | BPC-157Improved healing in muscle, tendon, ligament and bone injury models | TB-50042% more wound re-covering at day 4 and up to 61% at day 7 in rats (thymosin beta-4) |
| Human data[6,7,3] | BPC-157A 16-person knee chart review with no control group; a 2-person IV pilot | TB-500The FDA identified no human exposure data in compounding |
| FDA status[3] | BPC-157Not approved; compounding safety-risk listing shows as withdrawn (April 2026) | TB-500Not approved; compounding safety-risk listing shows as withdrawn (April 2026) |
| Common vial sizes | BPC-1575 mg and 10 mg | TB-5005 mg and 10 mg |
What is the difference between BPC-157 and TB-500?
Their origin and proposed mechanism. BPC-157 is a 15-amino-acid fragment of a protein from gastric juice; in lab work it supported blood vessel growth and helped tendon cells survive and move. TB-500 is related to thymosin beta-4, which binds actin and helps cells migrate into injured tissue.[1,4,2]
Which has more human evidence?
BPC-157, but only just. A 2025 systematic review found one human study among 36, and there is a 16-person knee-injection chart review and a two-person IV pilot. For thymosin beta-4/TB-500, the FDA said it identified no human exposure data in compounding. Neither has a controlled human trial among our sources.[1,6,7,3]
Are BPC-157 and TB-500 used together?
They are often sold together. The GLOW blend combines them with GHK-Cu, and the KLOW blend adds KPV. No study has tested BPC-157 and TB-500 as a combination, so what they do together, and whether the combination is safe, is unknown.
Is either one FDA-approved?
No. Neither BPC-157 nor TB-500 is an approved medicine. Both were on the FDA's list of compounding substances that may present significant safety risks; as of April 2026 those listings show as withdrawn, and an FDA advisory committee discussed both in July 2026. BPC-157 is also banned in professional sport.[3,1]
Work out the units for your vial
Milligrams are not comparable between compounds, and the units on your syringe depend on your vial and how much water you add. Each guide has a chart for its common vial sizes.
Questions
Common questions
Is BPC-157 or TB-500 better for healing?
Nobody knows. No study has compared them, and neither has been proven to work in people. Both improved healing measures in animal models, which does not show the same would happen in humans.
Is TB-500 the same as thymosin beta-4?
Closely related. Thymosin beta-4 is the natural 43-amino-acid protein the research is about. Products sold as TB-500 are synthetic and vary: some are the full sequence and some are a short fragment.
What are the side effects of BPC-157 and TB-500?
Unknown in people for both. A 2025 review found no clinical safety data for BPC-157. For TB-500 the FDA flagged a risk of immune reactions. Because the products are unregulated, purity and dose accuracy are separate risks.
How do you mix a 10 mg vial of either?
The maths is the same for both. With 2 mL of bacteriostatic water a 10 mg vial is 5 mg/mL, so 10 units on a U-100 syringe holds 0.5 mg. Use the reconstitution calculator for other amounts.
Sources
- 1.Emerging use of BPC-157 in orthopaedic sports medicine: a systematic review
Vasireddi N et al. HSS J 2025;21:485-495 · Review - 2.Thymosin β4: a multi-functional regenerative peptide
Goldstein AL et al. Expert Opin Biol Ther 2012;12:37-51 · Review - 3.FDA compounding safety-risk list
FDA. Bulk drug substances for compounding that may present significant safety risks (as of Apr 22, 2026) · FDA - 4.The promoting effect of BPC 157 on tendon healing
Chang CH et al. J Appl Physiol 2011;110:774-780 · Lab study - 5.Thymosin beta4 accelerates wound healing
Malinda KM et al. J Invest Dermatol 1999;113:364-368 · Animal study - 6.Intra-articular injection of BPC 157 for multiple types of knee pain
Lee E, Padgett B. Altern Ther Health Med 2021;27:8-13 · Human, small study - 7.Safety of intravenous infusion of BPC157 in humans: a pilot study
Lee E, Burgess K. Altern Ther Health Med 2025;31:20-24 · Human, small study
Last reviewed Oct 4, 2026. Education only, not medical advice. PepDose sells no peptides.