Retatrutide: testing volume and reliability evidence
A dated comparison of five international seller identities, with distinct report counts, source-checked identity findings and explicit limits on reliability claims.
Independent lab evidence
ZLZ
Zlz PeptideZLZ’s lab evidence dates to October 2024 and covers 325 test records across 20 recorded compound names, alongside 0 community reviews. Median purity is 99.8% across 316 positive purity tests.
▸ What you can check next
325Test records20 recorded name groups
Reports by test date
2024-10-282026-09-08
99.8%Median purity316 positive purity tests
0Community reviewsRead community experiences →
325 published records · 0 excluded by the current index · Names on reports; vendor role unverified. A test record is not necessarily a unique certificate.
Key facts
All time unless dated1
Endotoxin failures
17 classified tests
2
Expected compound not detected
318 reported purity outcomes
0
Underfilled >15%
15 fill tests · Last 6 months
4
Overfilled >15%
15 fill tests · Last 6 months
2
Reported zero amount
315 numeric amount results
Test results
How the fills compare
33 fill tests · All timeMeasured against the printed amount. Finnrick quantities are excluded.
Beyond the purity average
316 positive testsMean 99.6% · Median 99.8%. The 90% grouping is not a safety threshold.
Test coverage & missing results
7 records have no usable purity outcome. 292 do not have a comparable fill test. 308 lack a classified endotoxin result. A classified pass does not mean no endotoxin was detected.
Community reviews
Buyer experiences—not lab results or verified purchases.
0Positive
0Neutral
0Negative
0Unclassified
No approved reviews on file yet.
Prices & value
Market price index →Recorded offers—not a live stock guarantee. Package quantity, delivery market and price basis stay attached.
TitrateLab
Open the full price list.
Compare package quantities, prices per vial and per mg, and delivery markets. Both plans also open full lab reports, buyer reviews, watchlists and research tools.
Already a member? Sign in
Listing layout preview. Actual offers appear after access is checked.
Evidence over time
Dated records—not a performance trend2024-10-28 — 2026-09-08
Research involving ZLZ
All research →Published investigations, with the sources and context behind the findings.
Read investigation
Questions about ZLZ
Answers based on the published evidence—not a vendor endorsement.
Is ZLZ legit?
TitrateLab does not rank or recommend vendors; it reports what independent labs measured. ZLZ shows high measured purity (99.6% mean across 316 positive purity measurements; 2 identity failures reported separately). Dose accuracy is mixed and no recent result was under label: in the last 12 months 10 of 19 dose results were on target, 0 under label and 9 over; all time 20 of 33 on target, 0 under and 13 over. These results describe tested batches, not every product or shipment.
What is ZLZ's average purity?
99.6% mean measured purity across 316 positive third-party lab results; 315 were at or above 90% and 1 was below. In 2 additional tests, the labeled compound was not detected.
How many ZLZ lab certificates has TitrateLab tracked?
325 third-party certificates from 2024-10-28 to 2026-09-08, covering 20 compounds.
How accurate are ZLZ's doses?
Dose accuracy is mixed and no recent result was under label: in the last 12 months 10 of 19 dose results were on target, 0 under label and 9 over; all time 20 of 33 on target, 0 under and 13 over. A dose result compares the measured amount with the amount printed on the label: under is more than 10% below, over is more than 10% above, on target is everything in between. Finnrick results are excluded because that lab measures against the vendor's batch claim. Missing values are never counted as passes.
Has ZLZ failed an endotoxin test?
Endotoxin was reported on 17 of 325 counted records (5.2%). 1 of 17 classifiable results failed.
Sources, definitions & limits
325 published records are attributed to this vendor. The current certificate index excludes 0 repeated records using file hashes and supported lab verification links. Missing identity keys can leave repeated certificates. Recorded name groups can include variants, mixtures and unclassified names.
Evidence dates describe the tested samples, not when the vendor was founded, current stock, or a performance trend. Purity uses positive measurements only. Exact-zero purity is a not-detected identity outcome, not proof of an empty vial. A zero measured amount requires an explicit numeric amount result; missing amounts are not zero.
Underfills and overfills here exceed 15% in either direction against the printed amount. Vendor batch claims are not used; Finnrick quantity comparisons are excluded. Recent outcomes cover 2026-03-17 through 2026-09-17, inclusive. The older published ±10% partition may appear in the existing FAQ and is a different, explicitly labelled threshold. Missing tests are not passing results.
Endotoxin failures, borderline outcomes and passes use the recorded lab verdict. A pass is not proof of no endotoxin. Only 17 records have a classifiable result. Community sentiment describes reviews, not laboratory measurements or independently verified purchases. Results are not certification, medical advice or endorsement.
TitrateLab Pro
See the full results
Open available certificate images, the complete report archive and compound-level results.
Explore Pro access
Missing measurements stay missing. Membership unlocks access, not additional testing.