Yimei reviews
Yimei reviews: 131 independent lab tests across 12 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Is Yimei legit? Lab record: Mixed
How we rate- 131 independent tests
- 80 of 124 lots filled to label
- Median purity 99.9%
- 5 of 12 products graded D or E
Some of Yimei's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested NAD+
Yimei graded E. Shanghai Leader Peptide Biotechnology's NAD+ graded A across 3 tests.
Buy from Shanghai Leader Peptide BiotechnologyAll better-tested optionsPeptide Vendor Reviews independently tests products and verifies reviews. Public methodology, no pay-to-rank.
Better-tested options
Where Yimei graded D or E, these shops' samples of the same peptide graded A or B. Ordered by grade, then price per mg. Partner status never changes the order.
Yimei products we've tested
Best-graded first. Grades come from the share of each product's samples that passed purity and quantity checks. Buy links open Yimei's site.
- GHK-CuAGREAT
- Tests
- 17
- Passed
- 100.0%
- IpamorelinAGREAT
- Tests
- 8
- Passed
- 100.0%
- RetatrutideBGOOD
- Tests
- 53
- Passed
- 84.9%
- TirzepatideBGOOD
- Tests
- 7
- Passed
- 85.7%
- TesamorelinBGOOD
- Tests
- 6
- Passed
- 83.3%
- CJC-1295COKAY
- Tests
- 7
- Passed
- 71.4%
- hCGCOKAY
- Tests
- 4
- Passed
- 75.0%
- BPC-157DPOOR
- Tests
- 12
- Passed
- 66.7%
- TB-500DPOOR
- Tests
- 7
- Passed
- 66.7%
- EpithalonDPOOR
- Tests
- 3
- Passed
- 66.7%
- MOTS-cDPOOR
- Tests
- 3
- Passed
- 66.7%
- NAD+EBAD
- Tests
- 4
- Passed
- 50.0%
What the testing shows
Across 124 measured samples from Yimei, 44 came in more than 5% under the quantity on the label (35%). Another 38 measured more than 5% over. Purity across 127 readings ran from 53.44% to 99.99%, median 99.9%. Samples span Jun 2025 to Oct 2026.
- Under label
- 44/124
- Median purity
- 99.9%
- Latest sample
- Oct 2026
- Ships from
- China
more than 5% short
53.44%–99.99% range
first tested Jun 2025
per vendor listing
Our read on Yimei
106 of Yimei's 129 graded samples passed (82%), and 100% of all samples were sent in by buyers rather than by the shop.
The pass rate has held steady: 81% over the latest six months against 83% before.
When a sample failed, the most common reason was purity under 99.5% (17 times).
2 samples failed identity, meaning the lab could not confirm the vial held the labelled peptide.
Against the 302 shops with at least five graded tests, Yimei's pass rate is at or above 74% of them, and it has more tests on record than 93% of them.
When and how Yimei was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Krause Analytical (99), BTLabs (31), PharmLabs (1)
- Who sent the samples
- buyers 100%
- Batches covered
- 18 distinct batch numbers; 27 checked for endotoxins
Why Yimei's failed samples failed
The 6 most recent failed tests, with the lab's reason.
NAD+ · Sep 25, 2026
purity under 99.5%
BPC-157 · Aug 21, 2026
purity under 99.5%
CJC-1295 No DAC · Apr 28, 2026
purity under 99.5%
MOTS-c · Apr 28, 2026
purity under 99.5%
Retatrutide · Apr 23, 2026
purity under 99.5%
BPC-157 · Mar 21, 2026
amount in the vial more than 35% off the label
Lab testing results
Independent results across 12 products.
Individual lab tests
Date
10/14/2026
Purity
99.99%
Quantity
30 mg → 28.89 mg
Lab
PharmLabs
Vial
Silver crimp / Green cap
Date
9/25/2026
Purity
98.7%
Quantity
500 mg → 472 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Blue cap
Date
9/25/2026
Purity
99.9%
Quantity
10000 IU → 10000 IU
Lab
Krause Analytical
Vial
No label / Copper crimp / Clear cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| RetatrutideSilver crimp / Green cap | 10/14/2026 | 10.0 | 99.99% | 30 mg → 28.89 mg | PharmLabs | View |
| NAD+No label / Silver crimp / Blue cap | 9/25/2026 | 9.9 | 98.7% | 500 mg → 472 mg | Krause Analytical | View |
| hCGNo label / Copper crimp / Clear cap | 9/25/2026 | 10.0 | 99.9% | 10000 IU → 10000 IU | Krause Analytical | View |
| Epithalon | 8/21/2026 | 10.0 | 99.6% | 10 mg → 9.7 mg | BTLabs | View |
| GHK-Cu | 8/21/2026 | 10.0 | 99.7% | 50 mg → 56.6 mg | BTLabs | View |
Which Yimei products tested best
GHK-Cu, Ipamorelin, Tirzepatide, Retatrutide and Tesamorelin have the strongest record, graded A or B.
hCG and CJC-1295 graded C.
Epithalon, BPC-157, MOTS-c, TB-500 and NAD+ graded D or E: a large share of their samples missed purity or quantity thresholds.
Buying from Yimei
If you order from Yimei, the A- and B-graded products are the safer picks on this record. For the weaker ones, the better-tested options on this page come from other shops.
We don't track Yimei's prices yet. Shipping, payment and refund terms are on their site.
What to check before you pay
- The lot number on the vial matches the certificate
- The certificate names the lab and the test date
- Fill versus label, not purity alone
- A refund policy in writing
Track Yimei
Create a free account to save this vendor, get alerts for new lab tests, and watch price changes.
Yimei: common questions
Is Yimei legit?
We rate lab records, not businesses. Mixed lab record: 131 independent tests, 80 of 124 lots filled to label, median purity 99.9%, 5 of 12 products graded D or E. Each result links to its original certificate in the table above.
What do Yimei reviews say?
We don't hold scored customer reviews for Yimei yet. The independent lab results on this page are the evidence we have.
Which Yimei peptides tested best?
We have graded 12 Yimei products. GHK-Cu, Ipamorelin, Tirzepatide, Retatrutide and Tesamorelin graded A or B. Epithalon, BPC-157, MOTS-c, TB-500 and NAD+ graded D or E.
Is there a Yimei coupon code?
We don't have a verified Yimei coupon code. A discount changes the price, not what is in the vial.
Where does Yimei ship from?
Public listings place Yimei's shipping origin in China. Check the shop's own shipping page before ordering, as origin can change.
About Yimei
According to Pepaura Yimei is rebranding to Pepturion
Contact
- China