Before you enter

This is a medical program, not a store

Bioaminex does not sell products directly. Everything begins with lab work and a licensed physician. Please confirm you understand:

I'm not ready — exit

Peptide therapies may involve compounds that are prescription-only or investigational. Nothing here should be used without physician supervision and appropriate laboratory monitoring.

Home · Peptide library · TB-500
Recovery · Synthetic thymosin beta-4 fragment (investigational)

TB-500

Often paired with BPC-157 in recovery stacks — with an even thinner human evidence base. Here's what's actually been studied.

TB-500 is frequently sold alongside BPC-157 as a "recovery stack," but the two compounds don't have equivalent evidence behind them. TB-500 specifically has no completed human Phase 1 safety trial. This page explains what that means in practice.

At a glance

Drug class
Synthetic fragment of thymosin beta-4, a naturally occurring actin-regulating protein
FDA status
Not FDA-approved. Regulatory status in flux — see note below
Brand names
None (research/compounded compound only)
Discussed uses
Soft-tissue and muscle injury recovery (studied almost entirely in animals)
Route
Subcutaneous injection
Prescription
Only if/when a compounding pharmacy is legally able to prepare it — see status note

A note on regulatory status (as of July 2026): Like BPC-157, TB-500 was placed in FDA Category 2 in 2023 and removed from that list in April 2026 — a category change, not an approval or a safety finding. It's among the compounds scheduled for Pharmacy Compounding Advisory Committee review on July 23–24, 2026. Status should be reverified before any protocol is offered.

What TB-500 is

TB-500 is a synthetic, shortened version of thymosin beta-4, a protein involved in cell movement and structure throughout the body. It has no completed human Phase 1 safety trial and no published human pharmacokinetic or efficacy data for the injected fragment itself — the closest human evidence comes from a related topical eye-drop formulation using the full-length protein, not TB-500.

How it works (proposed)

Thymosin beta-4 biology is involved in actin regulation — the scaffolding that lets cells move and repair — which is the basis for TB-500's reputation in tissue and wound healing. This is reasonably well characterized in cell and animal studies. It has not been confirmed in controlled human trials for the synthetic fragment sold as "TB-500."

What the evidence shows

This is one of the thinnest human evidence bases of any peptide discussed on this site. The research that exists is preclinical or based on a different formulation entirely. That doesn't mean the underlying biology is implausible — it means the leap from "plausible mechanism in animals" to "effective and safe injectable for people" hasn't been made through rigorous human study.

Side effects and who it's not for

Without completed human trials, there is no established human safety profile — not "safe with mild side effects," but genuinely not yet characterized in controlled settings. That's a meaningfully different risk category than a drug with a known side-effect list, and it's why this compound, if offered at all, needs provider oversight and honest disclosure of the evidence gap rather than being sold as a routine recovery aid.

The Bioaminex standard for tb-500

Before starting
Baseline labs + provider review of current regulatory eligibility
Screening
Full medical history; explicit discussion of the limited (largely preclinical) evidence base
Dosing
Provider-managed, compounded by a licensed pharmacy only if currently permitted
During therapy
Close monitoring given the absence of established human safety data

The bottom line

TB-500 is discussed constantly in recovery and performance circles, but the human evidence trails even BPC-157's. If it's part of your protocol at all, it should come with a provider who says so plainly — not one who treats an animal-study mechanism as proof it works in you.

Want to know if it's right for you? That's not a question a website can answer — it's a clinical evaluation. Start your intake and a licensed provider will review your goals and your labs.

Start your consultation

Regulatory status as of 2026-07-20.

This article is for educational purposes only and is not medical advice. It does not establish a provider-patient relationship. FDA-approval status and clinical information are summarized in general terms and may change; consult a licensed healthcare provider and current prescribing information before making any medical decision. Bioaminex does not sell or dispense TB-500 or any medication.