Mai Peptide reviews
Mai Peptide reviews: 121 independent lab tests across 11 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Is Mai Peptide legit? Lab record: Mixed
How we rate- 121 independent tests
- 83 of 112 lots filled to label
- Median purity 99.8%
- 6 of 10 products graded D or E
Some of Mai Peptide's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested Tirzepatide
Mai Peptide graded E. Paradigm Peptide's Tirzepatide graded A across 10 tests, $4.97 / mg.
Buy from Paradigm PeptideAll better-tested optionsPeptide Vendor Reviews independently tests products and verifies reviews. Public methodology, no pay-to-rank.
Better-tested options
Where Mai Peptide 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.
Mai Peptide 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 Mai Peptide's site.
- RetatrutideBGOOD
- Tests
- 40
- Passed
- 85.0%
- GHK-CuBGOOD
- Tests
- 15
- Passed
- 80.0%
- IpamorelinBGOOD
- Tests
- 8
- Passed
- 87.5%
- TesamorelinBGOOD
- Tests
- 7
- Passed
- 85.7%
- CagrilintideDPOOR
- Tests
- 5
- Passed
- 60.0%
- CJC-1295DPOOR
- Tests
- 3
- Passed
- 66.7%
- TirzepatideEBAD
- Tests
- 29
- Passed
- 58.6%
- BPC-157EBAD
- Tests
- 6
- Passed
- 33.3%
- NAD+EBAD
- Tests
- 3
- Passed
- 33.3%
- TB-500EBAD
- Tests
- 3
- Passed
- 33.3%
- Tests
- 2
- Passed
- —
What the testing shows
Across 112 measured samples from Mai Peptide, 29 came in more than 5% under the quantity on the label (26%). Another 34 measured more than 5% over. Purity across 112 readings ran from 17.82% to 100%, median 99.8%. Samples span Aug 2025 to Oct 2026.
- Under label
- 29/112
- Median purity
- 99.8%
- Latest sample
- Oct 2026
- Ships from
- China
more than 5% short
17.82%–100% range
first tested Aug 2025
per vendor listing
Our read on Mai Peptide
85 of Mai Peptide's 121 graded samples passed (70%), and 100% of all samples were sent in by buyers rather than by the shop.
Results are slipping: 65% passed over the latest six months, down from 73% before.
When a sample failed, the most common reason was purity under 99.5% (26 times).
9 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, Mai Peptide's pass rate is at or above 45% of them, and it has more tests on record than 93% of them.
When and how Mai Peptide was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Krause Analytical (78), BTLabs (34), PharmLabs (6), Ichor Life Sciences (2)
- Who sent the samples
- buyers 100%
- Batches covered
- 69 distinct batch numbers; 3 checked for endotoxins
Why Mai Peptide's failed samples failed
The 6 most recent failed tests, with the lab's reason.
Tirzepatide · Sep 25, 2026
purity under 99.5%
Retatrutide · Sep 24, 2026
the lab could not confirm it was the labelled peptide
TB-500 · Sep 18, 2026
the lab could not confirm it was the labelled peptide
Semaglutide · Sep 18, 2026
the lab could not confirm it was the labelled peptide
BPC-157 · Aug 27, 2026
purity under 99.5%
GHK-Cu · Aug 25, 2026
purity under 99.5%
Lab testing results
Independent results across 11 products.
Individual lab tests
Date
10/6/2026
Purity
99.9%
Quantity
60 mg → 55.9 mg
Lab
BTLabs
Vial
No label / Silver crimp / Green cap
Date
10/1/2026
Purity
99.9%
Quantity
50 mg → 49.99 mg
Lab
Harrens Lab
Vial
No label / Silver crimp / Violet cap
Date
9/29/2026
Purity
100%
Quantity
100 mg → 129.677 mg
Lab
Ichor Life Sciences
Vial
No label / Silver crimp / Blue cap
Date
9/25/2026
Purity
91.1%
Quantity
20 mg → 20.6 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Yellow cap
Date
9/24/2026
Purity
99.9%
Quantity
15 mg → 13.1 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / White cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| TirzepatideNo label / Silver crimp / Green cap | 10/6/2026 | 10.0 | 99.9% | 60 mg → 55.9 mg | BTLabs | View |
| GHK-CuNo label / Silver crimp / Violet cap | 10/1/2026 | 10.0 | 99.9% | 50 mg → 49.99 mg | Harrens Lab | View |
| GHK-CuNo label / Silver crimp / Blue cap | 9/29/2026 | 10.0 | 100% | 100 mg → 129.677 mg | Ichor Life Sciences | View |
| TirzepatideNo label / Silver crimp / Yellow cap | 9/25/2026 | 9.1 | 91.1% | 20 mg → 20.6 mg | Krause Analytical | View |
| RetatrutideNo label / Silver crimp / White cap | 9/24/2026 | 10.0 | 99.9% | 15 mg → 13.1 mg | Krause Analytical | View |
Which Mai Peptide products tested best
Ipamorelin, Tesamorelin, Retatrutide and GHK-Cu have the strongest record, graded A or B.
CJC-1295, Cagrilintide, Tirzepatide, NAD+, TB-500 and BPC-157 graded D or E: a large share of their samples missed purity or quantity thresholds.
Buying from Mai Peptide
If you order from Mai Peptide, 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 Mai Peptide's prices yet. Shipping, payment and refund terms are on their site.
The official store is mai-peptides.com. Check the address before you pay.
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 Mai Peptide
Create a free account to save this vendor, get alerts for new lab tests, and watch price changes.
Mai Peptide: common questions
Is Mai Peptide legit?
We rate lab records, not businesses. Mixed lab record: 121 independent tests, 83 of 112 lots filled to label, median purity 99.8%, 6 of 10 products graded D or E. Each result links to its original certificate in the table above.
What do Mai Peptide reviews say?
We don't hold scored customer reviews for Mai Peptide yet. The independent lab results on this page are the evidence we have.
Which Mai Peptide peptides tested best?
We have graded 10 Mai Peptide products. Ipamorelin, Tesamorelin, Retatrutide and GHK-Cu graded A or B. CJC-1295, Cagrilintide, Tirzepatide, NAD+, TB-500 and BPC-157 graded D or E.
Is there a Mai Peptide coupon code?
We don't have a verified Mai Peptide coupon code. A discount changes the price, not what is in the vial.
Where does Mai Peptide ship from?
Public listings place Mai Peptide's shipping origin in China. Check the shop's own shipping page before ordering, as origin can change.
Ordering from Mai Peptide?
Mixed lab record: 121 independent tests, 83 of 112 lots filled to label, median purity 99.8%, 6 of 10 products graded D or E.
About Mai Peptide
https://www.maipeptide.com/
Contact
- China
- mai-peptides.com