ZePeptide reviews
ZePeptide reviews: 97 independent lab tests across 11 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Is ZePeptide legit? Lab record: Mixed
How we rate- 97 independent tests
- 46 of 76 lots filled to label
- Median purity 99.8%
- 4 of 9 products graded D or E
Some of ZePeptide's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested TB-500
ZePeptide graded E. Tech-Wave Peptides's TB-500 graded A across 3 tests.
Buy from Tech-Wave PeptidesAll better-tested optionsPeptide Vendor Reviews independently tests products and verifies reviews. Public methodology, no pay-to-rank.
Better-tested options
Where ZePeptide 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.
ZePeptide 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 ZePeptide's site.
- TesamorelinBGOOD
- Tests
- 7
- Passed
- 85.7%
- RetatrutideCOKAY
- Tests
- 41
- Passed
- 70.0%
- GHK-CuCOKAY
- Tests
- 10
- Passed
- 70.0%
- TirzepatideCOKAY
- Tests
- 7
- Passed
- 71.4%
- PT-141COKAY
- Tests
- 4
- Passed
- 75.0%
- BPC-157DPOOR
- Tests
- 10
- Passed
- 60.0%
- TB-500EBAD
- Tests
- 7
- Passed
- 57.1%
- MOTS-cEBAD
- Tests
- 3
- Passed
- 33.3%
- IpamorelinEBAD
- Tests
- 2
- Passed
- 50.0%
- Wolverine—
- Tests
- 3
- Passed
- —
- NAD+—
- Tests
- 3
- Passed
- —
What the testing shows
Across 76 measured samples from ZePeptide, 30 came in more than 5% under the quantity on the label (39%). Another 24 measured more than 5% over. Purity across 79 readings ran from 85.1% to 99.95%, median 99.8%. Samples span Nov 2025 to Oct 2026.
- Under label
- 30/76
- Median purity
- 99.8%
- Latest sample
- Oct 2026
- Ships from
- China
more than 5% short
85.1%–99.95% range
first tested Nov 2025
per vendor listing
Our read on ZePeptide
61 of ZePeptide's 96 graded samples passed (64%), and 100% of all samples were sent in by buyers rather than by the shop.
Results are slipping: 59% passed over the latest six months, down from 75% before.
When a sample failed, the most common reason was the lab could not confirm it was the labelled peptide (17 times).
Against the 302 shops with at least five graded tests, ZePeptide's pass rate is at or above 28% of them, and it has more tests on record than 91% of them.
When and how ZePeptide was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Krause Analytical (60), BTLabs (37)
- Who sent the samples
- buyers 100%
- Batches covered
- 42 distinct batch numbers; 10 checked for endotoxins
Why ZePeptide's failed samples failed
The 6 most recent failed tests, with the lab's reason.
NAD+ · Sep 24, 2026
the lab could not confirm it was the labelled peptide
Retatrutide · Sep 16, 2026
amount in the vial more than 35% off the label
MOTS-c · Sep 4, 2026
the lab could not confirm it was the labelled peptide
Retatrutide · Aug 31, 2026
the lab could not confirm it was the labelled peptide
TB-500 · Aug 13, 2026
the lab could not confirm it was the labelled peptide
BPC-157 · Aug 9, 2026
the lab could not confirm it was the labelled peptide
Lab testing results
Independent results across 11 products.
Individual lab tests
Date
10/8/2026
Purity
99.9%
Quantity
10 mg → 11 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Clear Red cap
Date
9/24/2026
Purity
—
Quantity
—
Lab
Krause Analytical
Vial
No label / Silver crimp / Black cap
Date
9/24/2026
Purity
99.7%
Quantity
40 mg → 33.7 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Blue cap
Date
9/16/2026
Purity
99.8%
Quantity
10 mg → 4.5 mg
Lab
BTLabs
Vial
White label / Copper crimp / Clear cap
Date
9/7/2026
Purity
99.8%
Quantity
20 mg → 14.9 mg
Lab
BTLabs
Vial
No label / Copper crimp / White cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| PT-141No label / Silver crimp / Clear Red cap | 10/8/2026 | 10.0 | 99.9% | 10 mg → 11 mg | Krause Analytical | View |
| NAD+No label / Silver crimp / Black cap | 9/24/2026 | — | — | Krause Analytical | View | |
| MOTS-cNo label / Silver crimp / Blue cap | 9/24/2026 | 10.0 | 99.7% | 40 mg → 33.7 mg | Krause Analytical | View |
| RetatrutideWhite label / Copper crimp / Clear cap | 9/16/2026 | 10.0 | 99.8% | 10 mg → 4.5 mg | BTLabs | View |
| RetatrutideNo label / Copper crimp / White cap | 9/7/2026 | 10.0 | 99.8% | 20 mg → 14.9 mg | BTLabs | View |
Which ZePeptide products tested best
Tesamorelin has the strongest record, graded A or B.
PT-141, Tirzepatide, Retatrutide and GHK-Cu graded C.
BPC-157, TB-500, Ipamorelin and MOTS-c graded D or E: a large share of their samples missed purity or quantity thresholds.
Buying from ZePeptide
If you order from ZePeptide, 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 ZePeptide's prices yet. Shipping, payment and refund terms are on their site.
The official store is www.zepeptides.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 ZePeptide
Create a free account to save this vendor, get alerts for new lab tests, and watch price changes.
ZePeptide: common questions
Is ZePeptide legit?
We rate lab records, not businesses. Mixed lab record: 97 independent tests, 46 of 76 lots filled to label, median purity 99.8%, 4 of 9 products graded D or E. Each result links to its original certificate in the table above.
What do ZePeptide reviews say?
We don't hold scored customer reviews for ZePeptide yet. The independent lab results on this page are the evidence we have.
Which ZePeptide peptides tested best?
We have graded 9 ZePeptide products. Tesamorelin graded A or B. BPC-157, TB-500, Ipamorelin and MOTS-c graded D or E.
Is there a ZePeptide coupon code?
We don't have a verified ZePeptide coupon code. A discount changes the price, not what is in the vial.
Where does ZePeptide ship from?
Public listings place ZePeptide's shipping origin in China. Check the shop's own shipping page before ordering, as origin can change.
Ordering from ZePeptide?
Mixed lab record: 97 independent tests, 46 of 76 lots filled to label, median purity 99.8%, 4 of 9 products graded D or E.
Contact
- china
- www.zepeptides.com