TB-500: 2,467 published COA source records

12 studies on TB-500 curated from PubMed, ClinicalTrials.gov, and EuropePMC. Updated daily.

Bottom line: TitrateLab indexes 2,467 published TB-500 COA source records from third-party laboratories, covering 828 publicly attributable vendor identities. Across 2,090 records with positive numeric purity, the arithmetic mean is 98.97%. 35 records report zero purity; these remain in the record count and are excluded from the positive-purity mean. 20 positive purity results are below 90%; 111 records report measured amount more than 10% below the label. The latest recorded test date is 2026-10-16. TitrateLab did not perform these laboratory tests. Source records are not unique batches, and vendor identity does not establish manufacturing role, product safety or overall quality.

TB-500 average prices

As of 2026-10-18, vendor-blind retail asking-price averages for the US delivery market, calculated from the same in-stock exact-strength cells as the Peptide Price Index. Shipping is excluded.

Strength Average / vial Observed range / vial Average / mg Coverage
4 mg $10.50 $10.50–$10.50 $2.62 1 source · 1 offer
5 mg $10.33 $9.50–$11.50 $2.07 3 sources · 3 offers
10 mg $18.00 $17.00–$18.50 $1.80 4 sources · 4 offers

Asking prices are not manufacturing cost and do not establish product equivalence, quality, safety, or legality. View full price methodology →

TB-500: published third-party laboratory evidence

All published source records, including absent and zero purity. Matching uses a case-insensitive exact peptide token. No deduplication in the headline; vendor rankings deduplicate eligible certificates separately. The COA archive can use normalized compound names and a different measurement or duplicate policy; totals from these populations need not match.

Latest recorded test: 2026-10-16. Aggregate calculated: 2026-10-18T04:28:00.970024+00:00. Calculation time is not a laboratory observation date.

Within that total, 571 source records have unresolved vendor identity. They remain in corpus-level lab evidence and are excluded from named-vendor rankings.

98.97%
Mean positive purity
35
Records reporting zero purity
2467
Published source records
828
Public vendor identities
20
Positive results below 90%
111
Amount below label >10%

Top 3 vendor evidence profiles for TB-500

Eligible vendors have at least 2 deduplicated certificates and 2 classifiable identity observations. Rank uses the 95% lower confidence bound on clean identity results; mean positive purity and certificate count break ties. Missing measurements are not passes. Exact-zero/not-detected and explicit wrong-compound markers count once per adverse certificate. This describes submitted-sample evidence, not every product or shipment, and is not an endorsement.

RankVendorDeduplicated certificatesAvg positive purityIdentity adverse results
#1 59 99.43% 0 of 47 (0.0%) 0 0% / not detected · 0 wrong compound · 12 unclassified Reveal with Pro →
#2 36 99.32% 0 of 29 (0.0%) 0 0% / not detected · 0 wrong compound · 7 unclassified Reveal with Pro →
#3 21 99.51% 0 of 21 (0.0%) 0 0% / not detected · 0 wrong compound Reveal with Pro →

Vendor identities are included with Pro. Record counts and lab measurements remain visible.

Recent source records: #120388 (99.6%) · #119568 (99.91%) · #120350 (99.17%) · #119631 · #119630 · #119475 (99.72%)

TB-500 studies and clinical research

Research tools

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