Cellupep reviews
Cellupep reviews: 43 independent lab tests across 6 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Is Cellupep legit? Lab record: Mixed
How we rate- 43 independent tests
- 29 of 39 lots filled to label
- Median purity 99.77%
- 3 of 6 products graded D or E
Some of Cellupep's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested Tesamorelin
Cellupep graded E. Shanghai ERP peptide Biotechnology's Tesamorelin graded A across 13 tests.
Buy from Shanghai ERP peptide BiotechnologyAll better-tested optionsPeptide Vendor Reviews independently tests products and verifies reviews. Public methodology, no pay-to-rank.
Better-tested options
Where Cellupep 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.
Cellupep 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 Cellupep's site.
- RetatrutideBGOOD
- Tests
- 17
- Passed
- 82.3%
- TirzepatideBGOOD
- Tests
- 7
- Passed
- 83.3%
- GHK-CuBGOOD
- Tests
- 5
- Passed
- 80.0%
- BPC-157EBAD
- Tests
- 6
- Passed
- 16.7%
- TesamorelinEBAD
- Tests
- 4
- Passed
- 50.0%
- TB-500EBAD
- Tests
- 4
- Passed
- 50.0%
What the testing shows
Across 39 measured samples from Cellupep, 10 came in more than 5% under the quantity on the label (26%). Another 14 measured more than 5% over. Purity across 40 readings ran from 89.9% to 99.99%, median 99.77%. Samples span Oct 2025 to Oct 2026.
- Under label
- 10/39
- Median purity
- 99.77%
- Latest sample
- Oct 2026
- Ships from
- China
more than 5% short
89.9%–99.99% range
first tested Oct 2025
per vendor listing
Our read on Cellupep
28 of Cellupep's 42 graded samples passed (67%), and 100% of all samples were sent in by buyers rather than by the shop.
The pass rate has held steady: 69% over the latest six months against 66% before.
When a sample failed, the most common reason was purity under 99.5% (11 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, Cellupep's pass rate is at or above 38% of them, and it has more tests on record than 74% of them.
When and how Cellupep was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Krause Analytical (28), BTLabs (14), PharmLabs (1)
- Who sent the samples
- buyers 100%
- Batches covered
- 20 distinct batch numbers; 12 checked for endotoxins
Why Cellupep's failed samples failed
The 6 most recent failed tests, with the lab's reason.
Retatrutide · Aug 9, 2026
the lab could not confirm it was the labelled peptide
Tirzepatide · Aug 9, 2026
the lab could not confirm it was the labelled peptide
BPC-157 · Jul 13, 2026
purity under 99.5%
Retatrutide · Apr 28, 2026
purity under 99.5%
TB-500 Thymosin Beta-4 · Mar 19, 2026
purity under 99.5%
BPC-157 · Mar 19, 2026
purity under 99.5%
Lab testing results
Independent results across 6 products.
Individual lab tests
Date
10/14/2026
Purity
99.99%
Quantity
10 mg → 9.84 mg
Lab
PharmLabs
Vial
Silver crimp / Black cap
Date
8/9/2026
Purity
—
Quantity
—
Lab
BTLabs
Vial
No label / Copper crimp / White cap
Date
8/9/2026
Purity
—
Quantity
—
Lab
BTLabs
Vial
No label / Gold crimp / Clear cap
Date
8/3/2026
Purity
99.9%
Quantity
50 mg → 45.9 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Yellow cap
Date
8/3/2026
Purity
99.9%
Quantity
30 mg → 26 mg
Lab
Krause Analytical
Vial
No label / Blue crimp / Clear cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| RetatrutideSilver crimp / Black cap | 10/14/2026 | 10.0 | 99.99% | 10 mg → 9.84 mg | PharmLabs | View |
| TirzepatideNo label / Copper crimp / White cap | 8/9/2026 | — | — | BTLabs | View | |
| RetatrutideNo label / Gold crimp / Clear cap | 8/9/2026 | — | — | BTLabs | View | |
| TirzepatideNo label / Silver crimp / Yellow cap | 8/3/2026 | 10.0 | 99.9% | 50 mg → 45.9 mg | Krause Analytical | View |
| RetatrutideNo label / Blue crimp / Clear cap | 8/3/2026 | 10.0 | 99.9% | 30 mg → 26 mg | Krause Analytical | View |
Which Cellupep products tested best
Tirzepatide, Retatrutide and GHK-Cu have the strongest record, graded A or B.
Tesamorelin, TB-500 and BPC-157 graded D or E: a large share of their samples missed purity or quantity thresholds.
Buying from Cellupep
If you order from Cellupep, 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 Cellupep's prices yet. Shipping, payment and refund terms are on their site.
The official store is cellupeptide.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 Cellupep
Create a free account to save this vendor, get alerts for new lab tests, and watch price changes.
Cellupep: common questions
Is Cellupep legit?
We rate lab records, not businesses. Mixed lab record: 43 independent tests, 29 of 39 lots filled to label, median purity 99.77%, 3 of 6 products graded D or E. Each result links to its original certificate in the table above.
What do Cellupep reviews say?
We don't hold scored customer reviews for Cellupep yet. The independent lab results on this page are the evidence we have.
Which Cellupep peptides tested best?
We have graded 6 Cellupep products. Tirzepatide, Retatrutide and GHK-Cu graded A or B. Tesamorelin, TB-500 and BPC-157 graded D or E.
Is there a Cellupep coupon code?
We don't have a verified Cellupep coupon code. A discount changes the price, not what is in the vial.
Where does Cellupep ship from?
Public listings place Cellupep's shipping origin in China. Check the shop's own shipping page before ordering, as origin can change.
Ordering from Cellupep?
Mixed lab record: 43 independent tests, 29 of 39 lots filled to label, median purity 99.77%, 3 of 6 products graded D or E.
Contact
- china
- cellupeptide.com