Independent lab evidence
Yimei’s lab evidence dates to June 2025 and covers 117 test records across 9 recorded compound names, alongside 0 community reviews. Median purity is 99.9% across 113 positive purity tests.
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117 published records · 0 excluded by the current index · Names on reports; vendor role unverified. A test record is not necessarily a unique certificate.
23 classified tests
115 reported purity outcomes
0 fill tests · Last 6 months
0 fill tests · Last 6 months
115 numeric amount results
Measured against the printed amount. Finnrick quantities are excluded.
Mean 98.8% · Median 99.9%. The 90% grouping is not a safety threshold.
2 records have no usable purity outcome. 117 do not have a comparable fill test. 94 lack a classified endotoxin result. A classified pass does not mean no endotoxin was detected.
Buyer experiences—not lab results or verified purchases.
No approved reviews on file yet.
Recorded offers—not a live stock guarantee. Package quantity, delivery market and price basis stay attached.
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2025-06-20 — 2026-08-21
Published investigations, with the sources and context behind the findings.
Answers based on the published evidence—not a vendor endorsement.
TitrateLab does not rank or recommend vendors; it reports what independent labs measured. Yimei shows high measured purity (98.8% mean across 113 positive purity measurements; 2 identity failures reported separately). No dose results are on file, so label accuracy cannot be assessed. These results describe tested batches, not every product or shipment.
98.8% mean measured purity across 113 positive third-party lab results; 109 were at or above 90% and 4 were below. In 2 additional tests, the labeled compound was not detected.
117 third-party certificates from 2025-06-20 to 2026-08-21, covering 9 compounds.
No dose results are on file, so label accuracy cannot be assessed. 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.
Endotoxin was reported on 23 of 117 counted records (19.7%). No failures were recorded in those 23.
117 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 23 records have a classifiable result. Community sentiment describes reviews, not laboratory measurements or independently verified purchases. Results are not certification, medical advice or endorsement.
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