Independent reference & toolkit 100 compounds graded · Last reviewed June 2026

Compare · Healing peptide

TB-500 vs Thymosin Beta-4

Both are healing peptide compounds. Here's how they line up on the evidence — graded the same way.

TB-500Thymosin Beta-4
Evidence 4/10 6/10
ClassHealing peptideHealing peptide
SummaryTB-500 is a synthetic thymosin beta-4 fragment marketed for healing, but human data on the fragment itself is essentially absent and the supporting research is animal-only.Full-length thymosin beta-4 has genuine human trials for eye-surface and wound healing, but the evidence is small, sponsor-driven, and largely missed its primary endpoints.
Full profile → Full profile →

TB-500

TB-500 is a lab-made peptide (a short chain of amino acids, the building blocks of proteins) that's sold widely as a "healing" and recovery product. It's important to keep it separate from the natural protein it's copied from, because a lot of the upbeat marketing borrows trust from research that…

Read the full evidence-graded TB-500 profile →

Thymosin Beta-4

Thymosin beta-4 stands out from most "research peptides" for one simple reason: it has actually gone through real, registered, peer-reviewed human trials. That is its honest claim to fame. But it is also where the story gets complicated, because its most-studied use has now fallen short of its main…

Read the full evidence-graded Thymosin Beta-4 profile →

← All comparisons & the compare tool