YB Peptide reviews
YB Peptide reviews: 22 independent lab tests across 4 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Is YB Peptide legit? Lab record: Mixed
How we rate- 22 independent tests
- 18 of 21 lots filled to label
- Median purity 99.8%
- 2 of 4 products graded D or E
Some of YB Peptide's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested Tirzepatide
YB 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 YB 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.
Tirzepatide
YB Peptide: grade ETesamorelin
YB Peptide: grade DYB 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 YB Peptide's site.
- RetatrutideAGREAT
- Tests
- 8
- Passed
- 100.0%
- BPC-157BGOOD
- Tests
- 5
- Passed
- 80.0%
- TesamorelinDPOOR
- Tests
- 5
- Passed
- 60.0%
- TirzepatideEBAD
- Tests
- 4
- Passed
- 50.0%
What the testing shows
Across 21 measured samples from YB Peptide, 3 came in more than 5% under the quantity on the label (14%). Another 7 measured more than 5% over. Purity across 21 readings ran from 91.7% to 99.95%, median 99.8%. Samples span Jul 2025 to Jun 2026.
- Under label
- 3/21
- Median purity
- 99.8%
- Latest sample
- Jun 2026
- Ships from
- China
more than 5% short
91.7%–99.95% range
first tested Jul 2025
per vendor listing
Our read on YB Peptide
17 of YB Peptide's 22 graded samples passed (77%), and 100% of all samples were sent in by buyers rather than by the shop.
Results are improving: 91% passed over the latest six months, up from 64% before.
When a sample failed, the most common reason was purity under 99.5% (3 times).
1 sample failed identity, meaning the lab could not confirm the vial held the labelled peptide.
Against the 302 shops with at least five graded tests, YB Peptide's pass rate is at or above 63% of them, and it has more tests on record than 55% of them.
When and how YB Peptide was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Krause Analytical (16), BTLabs (4), Freedom Diagnostics (1), Chromate (1)
- Who sent the samples
- buyers 100%
- Batches covered
- 7 distinct batch numbers; 1 checked for endotoxins
Why YB Peptide's failed samples failed
The 5 most recent failed tests, with the lab's reason.
Tirzepatide · Dec 29, 2025
amount in the vial more than 35% off the label
BPC-157 · Nov 25, 2025
the lab could not confirm it was the labelled peptide
Tesamorelin · Oct 9, 2025
purity under 99.5%
Tesamorelin · Sep 1, 2025
purity under 99.5%
Tirzepatide · Jul 28, 2025
purity under 99.5%
Lab testing results
Independent results across 4 products.
Individual lab tests
Date
6/1/2026
Purity
99.6%
Quantity
30 mg → 36.1 mg
Lab
Krause Analytical
Vial
White label / Copper crimp / Clear cap
Date
4/28/2026
Purity
99.5%
Quantity
10 mg → 10.2 mg
Lab
Krause Analytical
Vial
Clear Label / Silver Crimp / White Cap
Date
4/28/2026
Purity
99.9%
Quantity
30 mg → 30.8 mg
Lab
Krause Analytical
Vial
Clear Label / Silver Crimp / Clear Yellow Cap
Date
3/12/2026
Purity
99.9%
Quantity
10 mg → 9.07 mg
Lab
Krause Analytical
Vial
White Label / Silver Crimp / White Cap
Date
3/12/2026
Purity
99.9%
Quantity
10 mg → 9.62 mg
Lab
Krause Analytical
Vial
White Label / Silver Crimp / Green Cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| TirzepatideWhite label / Copper crimp / Clear cap | 6/1/2026 | 10.0 | 99.6% | 30 mg → 36.1 mg | Krause Analytical | View |
| TesamorelinClear Label / Silver Crimp / White Cap | 4/28/2026 | 9.9 | 99.5% | 10 mg → 10.2 mg | Krause Analytical | View |
| RetatrutideClear Label / Silver Crimp / Clear Yellow Cap | 4/28/2026 | 10.0 | 99.9% | 30 mg → 30.8 mg | Krause Analytical | View |
| TesamorelinWhite Label / Silver Crimp / White Cap | 3/12/2026 | 10.0 | 99.9% | 10 mg → 9.07 mg | Krause Analytical | View |
| RetatrutideWhite Label / Silver Crimp / Green Cap | 3/12/2026 | 10.0 | 99.9% | 10 mg → 9.62 mg | Krause Analytical | View |
Which YB Peptide products tested best
Retatrutide and BPC-157 have the strongest record, graded A or B.
Tesamorelin and Tirzepatide graded D or E: a large share of their samples missed purity or quantity thresholds.
Buying from YB Peptide
If you order from YB 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 YB Peptide's prices yet. Shipping, payment and refund terms are on their site.
The official store is www.ybpeptide.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 YB Peptide
Create a free account to save this vendor, get alerts for new lab tests, and watch price changes.
YB Peptide: common questions
Is YB Peptide legit?
We rate lab records, not businesses. Mixed lab record: 22 independent tests, 18 of 21 lots filled to label, median purity 99.8%, 2 of 4 products graded D or E. Each result links to its original certificate in the table above.
What do YB Peptide reviews say?
We don't hold scored customer reviews for YB Peptide yet. The independent lab results on this page are the evidence we have.
Which YB Peptide peptides tested best?
We have graded 4 YB Peptide products. Retatrutide and BPC-157 graded A or B. Tesamorelin and Tirzepatide graded D or E.
Is there a YB Peptide coupon code?
We don't have a verified YB Peptide coupon code. A discount changes the price, not what is in the vial.
Where does YB Peptide ship from?
Public listings place YB Peptide's shipping origin in China. Check the shop's own shipping page before ordering, as origin can change.
Ordering from YB Peptide?
Mixed lab record: 22 independent tests, 18 of 21 lots filled to label, median purity 99.8%, 2 of 4 products graded D or E.
Contact
- China
- www.ybpeptide.com