tb-500 vs tb-500 frag

tb-500 (A-tier) vs tb-500 frag (C-tier). mechanism, trials, evidence boundaries, dosing literature. side-by-side reference.

tb-500 · tier A

names a 7-amino-acid fragment of thymosin beta-4, but the vial you buy is a coin toss: fragment, full-length protein, or mislabeled. the COA mass is the only thing that knows.

the name means a 7-amino-acid fragment of thymosin beta-4, but vendor vials routinely contain the full 43-amino-acid protein instead, and the label does not tell you which. the molecule is real and the human proof is not.

banned USEF 2014 · half-life ~0.5 to 2 hours (human phase-1 PK, PMID 34346165; dose-dependent), same as full thymosin beta-4 when that is what the vial holds; the bare heptapeptide clears faster · healing

tb-500 frag · tier C

the 7-amino-acid core of TB-500. half the price. half the data.

the 7-amino-acid LKKTETQ core of TB-500. half the price, half the data, all the extrapolation.

frag thymosin β4 17-23 · half-life short free-peptide plasma half-life (minutes to an hour depending on formulation); full thymosin beta-4's pharmacokinetics are better characterized than the fragment's · healing

at a glance

• tb-500: tier A · banned USEF 2014
• tb-500 frag: tier C · frag thymosin β4 17-23

reptides grades the research record and cites the literature behind every call. research reference only; not medical advice.