TB-500 — Vendor Comparison

Thymosin Beta-4 fragment with tissue repair and anti-inflammatory properties. Often studied alongside BPC-157 for synergistic healing effects.

Rankings based on our Vendor Transparency Score — COA publishing, lab accreditation, batch traceability, and published policies.See our methodology →
We earn commissions from some vendors below. This doesn't affect our rankings — they're determined by Vendor Transparency Scores alone.Full disclosure →

How We Score Transparency

Public COA AccessCore evidenceCertificates of Analysis visible on site with batch-specific results
Batch TraceabilityCore evidenceCOA batch numbers match product labels and packaging
Named Testing LabCore evidenceTesting lab is named and independently verifiable
Policy PagesSupporting trustDedicated refund and/or shipping policy pages
Identifiable OwnershipSupporting trustNamed founders, registered business, or physical address
Methodology v2.0 · Last updated Mar 14, 2026Full methodology →
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17 vendors
IP
Ion PeptidesIn Stock
A
Published
COAs
2025
Est.
$49.00
$4.90/mg
VP
Verified PeptidesIn Stock
A
Published
COAs
2020
Est.
$62.00
$6.20/mg
PC
Peptide CraftersIn Stock
A
Published
COAs
2024
Est.
$65.00
$6.50/mg
SP
Simple PeptidesIn Stock
A
Published
COAs
2023
Est.
$65.00
$6.50/mg
SP
Skye PeptidesIn Stock
A
Published
COAs
2023
Est.
$69.00
$6.90/mg
NP
NuScience PeptidesIn Stock
A
Published
COAs
2003
Est.
$74.99
$7.50/mg
N
NexaphIn Stock
B
Published
COAs
2024
Est.
$24.50
$2.45/mg
AOP
Alpha Omega PeptidesIn Stock
B
Published
COAs
2024
Est.
$65.00
$6.50/mg
EP
Eternal PeptidesIn Stock
B
Published
COAs
2024
Est.
$74.99
$7.50/mg
LB
Limitless BiotechIn Stock
B
Published
COAs
2015
Est.
$133.99
$13.40/mg
BL
Biolongevity LabsIn Stock
B
Published
COAs
2024
Est.
$164.97
$16.50/mg
PP
Planet PeptideIn Stock
C
None
COAs
2021
Est.
$55.00
$5.50/mg
AL
Atomik LabzIn Stock
C
Published
COAs
2024
Est.
$65.00
$6.50/mg
PP
Polaris PeptidesIn Stock
C
Published
COAs
2024
Est.
$70.00
$7.00/mg
PP
Penguin PeptidesIn Stock
C
Published
COAs
2025
Est.
$70.00
$7.00/mg
PPC
Precision Peptide CoIn Stock
C
Published
COAs
2023
Est.
$89.99
$9.00/mg
P
PureRawzIn Stock
C
Published
COAs
2017
Est.
$179.79
$17.98/mg