TitrateLab/Vendors/Grey Market Peptides
▸ Vendor trust profile
Grey Market Peptides: Independent Lab Review (143 COAs Tested)
Lab-verified evidenceAn independent, evidence-first review of Grey Market Peptides — wondering if Grey Market Peptides is legit? Every number below is sourced from 143 third-party lab certificates of analysis, not vendor marketing. The headline trust stats are free; the batch-by-batch evidence, every certificate, pricing & stock are TitrateLab Pro.
Average purity
mean across 70 assayed batches
⚠ 2 batches underdosed — worst -75% vs labeled dose
Purity distribution
70 batches · ProCOAs tracked
143
third-party certs
In-spec rate
97%
2 underdosed · worst -75%
Compounds
66
distinct peptides
Coverage
2026-02 → 2026-03
first → latest test
The batch-by-batch distribution is a Pro feature
See every one of Grey Market Peptides's 70 assayed batches plotted by purity around the 99.4% average — the real per-batch readings behind the headline stats.
Go Pro — $9/mo or $33 lifetimeDose distribution
17 batches dose-testedPurity tells you how clean the peptide is. Dose tells you how much you actually got — tested milligrams vs the labeled amount. A vial can be 99% pure and still badly underfilled, which never shows on the purity chart. On-target means within ±10% of label; anything outside (under or over) is off-target.
On-target
24%
within ±10% of label
Median
+26%
vs labeled dose
Worst underfill
-75%
2 batches <−10%
Worst overfill
+48%
11 batches >+10%
The batch-by-batch dose distribution is a Pro feature
See every one of Grey Market Peptides's 17 dose-tested batches plotted by deviation from labeled dose — the real per-batch underfill/overfill behind the headline stats.
Go Pro — $9/mo or $33 lifetimeCompounds tested
66 distinctPeptides with at least one tracked certificate from this vendor. Tap a linked compound for the full research hub.
Recent certificates
143 total · showing 2A sample of the most recently tested batches. Each links to its full, public certificate page — purity, method, lab, and test date.
Inline purity on every batch is a Pro feature
The full certificate list below is free. Pro reads the measured purity, method, lab, and test date inline on every one of the 143 third-party batches TitrateLab tracks for Grey Market Peptides — plus the batch-by-batch distribution and per-compound breakdown.
Go Pro — $9/mo or $33 lifetimeCertificates by compound
143 third-party COAs · 67 compoundsEvery third-party certificate of analysis TitrateLab tracks for Grey Market Peptides, grouped by compound. Tap a thumbnail for the full certificate image; each links through to its public cert page — purity, method, lab, and test date.
Other certificates
GLP SM
Tesamorelin
Chonluten
Livagen
NAD+
Retatrutide
AOD-9604
BPC-157 + GHK-Cu + KPV + TB-500
CJC-1295 + Ipamorelin
Tirzepatide
Vesilute
BPC-157 + GHK-Cu + TB-500
BPC-157 + TB-500
BPC-157 + TB-500 + Thymosin Alpha-1
Cagrilintide/GLP SM
Carnitine/Inositol/Choline
CJC no DAC + Ipamorelin
CJC-1295 w/ DAC
Thymosin Alpha-1
Per-compound purity
mean purity by peptide · ProAverage assayed purity for each of 66 compounds — the batch-level breakdown behind the headline average. Tap the tile to unlock with Pro.
Per-compound purity is a Pro feature
See Grey Market Peptides's average assayed purity for each of its 66 compounds — the batch-level breakdown behind the headline 99.4% average.
Go Pro — $9/mo or $33 lifetimeCommunity reviews
Pro-member sourcedUnlock Grey Market Peptides's full lab evidence
The trust teaser above and the full certificate list are free & always will be. Unlock every batch's purity inline across all 143 certificates, the batch-by-batch purity distribution, the per-compound breakdown, plus live pricing, stock & the full Pro review thread.
Instant access · cancel anytime · no pay-to-rank, ever
Frequently asked
purity & lab evidenceIs Grey Market Peptides legit?
TitrateLab tracks 143 third-party lab certificates of analysis for Grey Market Peptides, averaging 99.4% tested purity across 70 assayed batches, with 97% of those batches in spec on both purity (≥90%) and labeled dose (filled to within 10% of the labeled amount); 2 assayed batches were significantly underdosed (worst -75% vs the labeled amount) (tests dated 2026-02-16 to 2026-03-13). These are purity analytics from independent certificates, not vendor marketing — TitrateLab does not rank or endorse vendors, and this is research-use-only information, not a recommendation to purchase or use any product.
What is Grey Market Peptides's average tested purity?
Across the 70 assayed batches TitrateLab tracks for Grey Market Peptides, the mean third-party-tested purity is 99.4%. Purity is measured on the specific batches that were submitted for analysis and is not a guarantee for any other lot.
How many lab certificates does TitrateLab track for Grey Market Peptides?
TitrateLab tracks 143 published third-party certificates of analysis for Grey Market Peptides spanning 66 distinct compounds. Each certificate links to its own public page with the purity, test method, issuing lab, and test date.
What share of Grey Market Peptides's tested batches are in spec on purity and dose?
97% of the 70 assayed batches TitrateLab tracks for Grey Market Peptides (68 of 70) were in spec on BOTH tested purity (at or above 90%) and labeled dose (filled to within 10% of the labeled amount). 2 assayed batches were significantly underdosed against the label (worst -75%), so they are counted as out of spec even where tested purity was high. This reflects only the batches that were tested and is analytic information for research use, not a quality guarantee for any order.
Answers are derived from the third-party lab certificates TitrateLab tracks for this vendor and describe tested purity only. This is research-use-only information, not medical advice and not a recommendation to purchase or use any product.
How this is sourced. TitrateLab tracks certificates of analysis posted by the community and verified against the issuing lab. Purity, test dates, and compound names shown here are the same facts published on each public certificate page — aggregated, never edited. The in-spec rate counts a batch only when it clears both purity (≥90%) and labeled dose (filled to within 10% of label, where dose data exists); it reflects the batches that were tested and is not a guarantee of every order. Scores come only from lab data — no vendor pays for placement, and customer orders or Pro never move a grade. Browse the COA corpus →