TitrateLab/Vendors/GYC
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GYC: Independent Lab Review (284 COAs Tested)
Lab-verified evidenceAn independent, evidence-first review of GYC — wondering if GYC is legit? Every number below is sourced from 284 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 224 assayed batches
⚠ 4 batches underdosed — worst -40% vs labeled dose
Purity distribution
224 batches · ProCOAs tracked
284
third-party certs
In-spec rate
97%
4 underdosed · worst -40%
Compounds
31
distinct peptides
Coverage
2024-09 → 2026-07
first → latest test
The batch-by-batch distribution is a Pro feature
See every one of GYC's 224 assayed batches plotted by purity around the 98.8% average — the real per-batch readings behind the headline stats.
Go Pro — $12/mo or $33 lifetimeDose distribution
188 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
54%
within ±10% of label
Median
+10%
vs labeled dose
Worst underfill
-40%
4 batches <−10%
Worst overfill
+45%
82 batches >+10%
The batch-by-batch dose distribution is a Pro feature
See every one of GYC's 188 dose-tested batches plotted by deviation from labeled dose — the real per-batch underfill/overfill behind the headline stats.
Go Pro — $12/mo or $33 lifetimeCompounds tested
31 distinct · 284 certsGrouped by class, most-tested first. Tap a linked compound for the full research hub.
No compound matches .
- BPC-157 + GHK-Cu + TB-500 5
- Cagrilintide + Semaglutide 3
- BPC-157 + GHK-Cu + KPV + TB-500 1
- BPC-157 + TB-500 1
Certificates by compound
284 third-party COAs · 32 compoundsEvery third-party certificate of analysis TitrateLab tracks for GYC, 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.
Tirzepatide
Retatrutide
BPC-157
Cagrilintide
TB-500
NAD+
GHK-Cu
SS-31
Tesamorelin
Semaglutide
Show 6 more compounds with 3+ certificates
BPC-157 + GHK-Cu + TB-500
Cagrilintide + Semaglutide
Glow blend
Selank
Compound explorer
32 compounds · 284 certificatesEvery compound GYC has certificates for. Switch the measure — each one reports how many certificates it is actually based on, and compounds never tested for that measure drop out rather than showing as zero.
32 compounds, 96 certificates on the busiest
Retatrutide 78
BPC-157 12
Cagrilintide 11
TB-500 11
GHK-Cu 8
SS-31 7
Tesamorelin 7
Semaglutide 6
BPC-157 + GHK-Cu + TB-500 5
MOTS-C 5
Cagrilintide + Semaglutide 3
Epithalon 3
Glow blend 3
Selank 3
BPC-157 + GHK-Cu + KPV + TB-500 1
BPC-157 + TB-500 1
CJC-1295 1
IGF-1 LR3 1
Ipamorelin 1
KLOW blend 1
KPV 1
Melanotan II 1
Other certificates 1
PT-141 1
Survodutide 1
Thymosin Alpha-1 1
Unknown 1
Community reviews
Pro-member sourcedUnlock GYC'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 284 certificates, the batch-by-batch purity distribution, the per-compound breakdown, plus live pricing, stock & the full Pro review thread.
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Frequently asked
purity & lab evidenceIs GYC legit?
TitrateLab tracks 284 third-party lab certificates of analysis for GYC, averaging 98.8% tested purity across 224 assayed batches, with 97% of those batches in spec on both purity (≥90%) and labeled dose (filled to within 10% of the labeled amount); 4 assayed batches were significantly underdosed (worst -40% vs the labeled amount) (tests dated 2024-09-30 to 2026-07-31). 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 GYC's average tested purity?
Across the 224 assayed batches TitrateLab tracks for GYC, the mean third-party-tested purity is 98.8%. 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 GYC?
TitrateLab tracks 284 published third-party certificates of analysis for GYC spanning 31 distinct compounds. Each certificate links to its own public page with the purity, test method, issuing lab, and test date.
What share of GYC's tested batches are in spec on purity and dose?
97% of the 224 assayed batches TitrateLab tracks for GYC (218 of 224) were in spec on BOTH tested purity (at or above 90%) and labeled dose (filled to within 10% of the labeled amount). 4 assayed batches were significantly underdosed against the label (worst -40%), 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 →