Nanjing Peptide Biotechnology reviews
Nanjing Peptide Biotechnology reviews: 4 independent lab tests across 1 product, with a limited lab record.
Written by the Peptide Vendor Reviews editorial team
Is Nanjing Peptide Biotechnology legit? Lab record: Limited
How we rate- 4 independent tests
- 2 of 3 lots filled to label
- Median purity 99.7%
- 1 of 1 product graded D or E
Some of Nanjing Peptide Biotechnology's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested Retatrutide
Nanjing Peptide Biotechnology graded E. Paradigm Peptide's Retatrutide graded A across 8 tests, $10.00 / 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 Nanjing Peptide Biotechnology 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.
Retatrutide
Nanjing Peptide Biotechnology: grade ENanjing Peptide Biotechnology 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 Nanjing Peptide Biotechnology's site.
- RetatrutideEBAD
- Tests
- 4
- Passed
- 50.0%
What the testing shows
Across 3 measured samples from Nanjing Peptide Biotechnology, 1 came in more than 5% under the quantity on the label (33%). Another 1 measured more than 5% over. Purity across 3 readings ran from 98.2% to 99.9%, median 99.7%. Samples span Apr 2026 to Jun 2026.
- Under label
- 1/3
- Median purity
- 99.7%
- Latest sample
- Jun 2026
more than 5% short
98.2%–99.9% range
first tested Apr 2026
Our read on Nanjing Peptide Biotechnology
2 of Nanjing Peptide Biotechnology's 4 graded samples passed (50%), and 100% of all samples were sent in by buyers rather than by the shop.
When a sample failed, the most common reason was the lab could not confirm it was the labelled peptide (1 time).
When and how Nanjing Peptide Biotechnology was tested
Samples per month. The darker part of each bar failed.
- Labs used
- BTLabs (3), Krause Analytical (1)
- Who sent the samples
- buyers 100%
- Batches covered
- 4 distinct batch numbers; 1 checked for endotoxins
Why Nanjing Peptide Biotechnology's failed samples failed
The 2 most recent failed tests, with the lab's reason.
Retatrutide · Jun 26, 2026
purity under 99.5%
Retatrutide · Jun 26, 2026
the lab could not confirm it was the labelled peptide
Lab testing results
Independent results across 1 product.
Individual lab tests
Date
6/26/2026
Purity
—
Quantity
—
Lab
BTLabs
Vial
White label / Silver crimp / Blue cap
Date
6/26/2026
Purity
99.7%
Quantity
20 mg → 21.6 mg
Lab
BTLabs
Vial
White label / Silver crimp / White cap
Date
6/26/2026
Purity
98.2%
Quantity
50 mg → 38.8 mg
Lab
BTLabs
Vial
White label / Silver crimp / Blue cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| RetatrutideWhite label / Silver crimp / Blue cap | 6/26/2026 | — | — | BTLabs | View | |
| RetatrutideWhite label / Silver crimp / White cap | 6/26/2026 | 10.0 | 99.7% | 20 mg → 21.6 mg | BTLabs | View |
| RetatrutideWhite label / Silver crimp / Blue cap | 6/26/2026 | 9.8 | 98.2% | 50 mg → 38.8 mg | BTLabs | View |
| Retatrutide | 4/26/2026 | 10.0 | 99.9% | 15 mg → 14.6 mg | Krause Analytical | View |
Which Nanjing Peptide Biotechnology products tested best
Retatrutide graded D or E: a large share of its samples missed purity or quantity thresholds.
Buying from Nanjing Peptide Biotechnology
We don't track Nanjing Peptide Biotechnology's prices yet. Shipping, payment and refund terms are on their site.
The official store is www.njpeptide.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 Nanjing Peptide Biotechnology
Create a free account to save this vendor, get alerts for new lab tests, and watch price changes.
Nanjing Peptide Biotechnology: common questions
Is Nanjing Peptide Biotechnology legit?
We rate lab records, not businesses. Limited lab record: 4 independent tests, 2 of 3 lots filled to label, median purity 99.7%, 1 of 1 product graded D or E. Each result links to its original certificate in the table above.
What do Nanjing Peptide Biotechnology reviews say?
We don't hold scored customer reviews for Nanjing Peptide Biotechnology yet. The independent lab results on this page are the evidence we have.
Which Nanjing Peptide Biotechnology peptides tested best?
We have graded 1 Nanjing Peptide Biotechnology product. Retatrutide graded D or E.
Is there a Nanjing Peptide Biotechnology coupon code?
We don't have a verified Nanjing Peptide Biotechnology coupon code. A discount changes the price, not what is in the vial.
Ordering from Nanjing Peptide Biotechnology?
Limited lab record: 4 independent tests, 2 of 3 lots filled to label, median purity 99.7%, 1 of 1 product graded D or E.