ZyBio Peptides reviews
ZyBio Peptides reviews: 3 independent lab tests across 1 product, with a limited lab record.
Written by the Peptide Vendor Reviews editorial team
Is ZyBio Peptides legit? Lab record: Limited
How we rate- 3 independent tests
- 0 of 3 lots filled to label
- Median purity 99.9%
- 1 of 1 product graded D or E
Some of ZyBio Peptides's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested Retatrutide
ZyBio Peptides graded D. 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 ZyBio Peptides 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
ZyBio Peptides: grade DZyBio Peptides 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 ZyBio Peptides' site.
- RetatrutideDPOOR
- Tests
- 3
- Passed
- 66.7%
What the testing shows
Across 3 measured samples from ZyBio Peptides, 3 came in more than 5% under the quantity on the label (100%). Purity across 3 readings ran from 98.6% to 99.95%, median 99.9%. Samples span Sep 2025 to Jun 2026.
- Under label
- 3/3
- Median purity
- 99.9%
- Latest sample
- Jun 2026
- Ships from
- China
more than 5% short
98.6%–99.95% range
first tested Sep 2025
per vendor listing
Our read on ZyBio Peptides
2 of ZyBio Peptides' 3 graded samples passed (67%), and 100% of all samples were sent in by buyers rather than by the shop.
When a sample failed, the most common reason was purity under 99.5% (1 time).
When and how ZyBio Peptides was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Krause Analytical (3)
- Who sent the samples
- buyers 100%
- Batches covered
- 1 distinct batch numbers; 1 checked for endotoxins
Why ZyBio Peptides' failed samples failed
The only failed test, with the lab's reason.
Retatrutide · Mar 18, 2026
purity under 99.5%
Lab testing results
Independent results across 1 product.
Individual lab tests
Date
6/2/2026
Purity
99.9%
Quantity
14 mg → 12.6 mg
Lab
Krause Analytical
Vial
White label / Silver crimp / Black cap
Date
3/18/2026
Purity
98.6%
Quantity
10 mg → 8.44 mg
Lab
Krause Analytical
Vial
No Label / Gold Crimp / Clear Cap
Date
9/10/2025
Purity
99.95%
Quantity
15 mg → 13.7 mg
Lab
Krause Analytical
Vial
No Label / Silver Crimp / White Cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| RetatrutideWhite label / Silver crimp / Black cap | 6/2/2026 | 10.0 | 99.9% | 14 mg → 12.6 mg | Krause Analytical | View |
| RetatrutideNo Label / Gold Crimp / Clear Cap | 3/18/2026 | 9.9 | 98.6% | 10 mg → 8.44 mg | Krause Analytical | View |
| RetatrutideNo Label / Silver Crimp / White Cap | 9/10/2025 | 10.0 | 99.95% | 15 mg → 13.7 mg | Krause Analytical | View |
Which ZyBio Peptides products tested best
Retatrutide graded D or E: a large share of its samples missed purity or quantity thresholds.
Buying from ZyBio Peptides
We don't track ZyBio Peptides' prices yet. Shipping, payment and refund terms are on their site.
The official store is www.zybiopeptides.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 ZyBio Peptides
Create a free account to save this vendor, get alerts for new lab tests, and watch price changes.
ZyBio Peptides: common questions
Is ZyBio Peptides legit?
We rate lab records, not businesses. Limited lab record: 3 independent tests, 0 of 3 lots filled to label, median purity 99.9%, 1 of 1 product graded D or E. Each result links to its original certificate in the table above.
What do ZyBio Peptides reviews say?
We don't hold scored customer reviews for ZyBio Peptides yet. The independent lab results on this page are the evidence we have.
Which ZyBio Peptides peptides tested best?
We have graded 1 ZyBio Peptides product. Retatrutide graded D or E.
Is there a ZyBio Peptides coupon code?
We don't have a verified ZyBio Peptides coupon code. A discount changes the price, not what is in the vial.
Where does ZyBio Peptides ship from?
Public listings place ZyBio Peptides's shipping origin in China. Check the shop's own shipping page before ordering, as origin can change.
Ordering from ZyBio Peptides?
Limited lab record: 3 independent tests, 0 of 3 lots filled to label, median purity 99.9%, 1 of 1 product graded D or E.