Peptide Crafters Reviews
Peptide Crafters review: 60 independent lab tests across 9 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Is Peptide Crafters legit? Lab record: Mixed
How we rate- 60 independent tests
- 53 of 60 lots filled to label
- Median purity 99.73%
- 6 of 9 products graded D or E
Some of Peptide Crafters's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested Melanotan II
Peptide Crafters graded E. Eternal Peptides's Melanotan II graded A across 4 tests, $4.00 / mg.
Buy from Eternal PeptidesAll better-tested optionsPeptide Vendor Reviews independently tests products and verifies reviews. Public methodology, no pay-to-rank.
Better-tested options
Where Peptide Crafters 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.
Melanotan II
Peptide Crafters: grade EBPC-157
Peptide Crafters: grade ECJC-1295
Peptide Crafters: grade EPeptide Crafters 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 Peptide Crafters' site.
- SemaglutideAGREAT
- Tests
- 10
- Passed
- 100.0%
- RetatrutideCOKAY
- Tests
- 8
- Passed
- 75.0%
- IpamorelinCOKAY
- Tests
- 7
- Passed
- 71.4%
- TB-500DPOOR
- Tests
- 6
- Passed
- 66.7%
- TirzepatideDPOOR
- Tests
- 6
- Passed
- 66.7%
- TesamorelinDPOOR
- Tests
- 3
- Passed
- 66.7%
- BPC-157EBAD
- Tests
- 11
- Passed
- 45.5%
- CJC-1295EBAD
- Tests
- 5
- Passed
- 20.0%
- Melanotan IIEBAD
- Tests
- 4
- Passed
- 50.0%
What the testing shows
Across 60 measured samples from Peptide Crafters, 7 came in more than 5% under the quantity on the label (12%). Another 36 measured more than 5% over. Purity across 60 readings ran from 77.7% to 99.99%, median 99.73%. Samples span Dec 2024 to Oct 2026.
- Under label
- 7/60
- Median purity
- 99.73%
- Latest sample
- Oct 2026
- Ships from
- United States
more than 5% short
77.7%–99.99% range
first tested Dec 2024
per vendor listing
Our read on Peptide Crafters
39 of Peptide Crafters' 60 graded samples passed (65%), and 23% of all samples were sent in by buyers rather than by the shop.
The pass rate has held steady: 63% over the latest six months against 66% before.
When a sample failed, the most common reason was purity under 99.5% (19 times).
Against the 302 shops with at least five graded tests, Peptide Crafters' pass rate is at or above 30% of them, and it has more tests on record than 82% of them.
When and how Peptide Crafters was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Chromate (15), TrustPointe (12), Krause Analytical (10), MZ Biolabs (10)
- Who sent the samples
- buyers 23%, testing programme 77%
- Batches covered
- 23 distinct batch numbers; 1 checked for endotoxins
Why Peptide Crafters' failed samples failed
The 6 most recent failed tests, with the lab's reason.
BPC-157 · Sep 15, 2026
purity under 99.5%
TB-500 · Sep 15, 2026
purity under 99.5%
TB-500 Thymosin Beta-4 · Sep 4, 2026
purity under 99.5%
Ipamorelin · Sep 4, 2026
purity under 99.5%
BPC-157 · Sep 4, 2026
purity under 99.5%
BPC-157 · Aug 27, 2026
purity under 99.5%
Lab testing results
Independent results across 9 products.
Individual lab tests
Date
10/12/2026
Purity
99.99%
Quantity
10 mg → 11.18 mg
Lab
PharmLabs
Vial
Silver crimp / Green cap
Date
9/15/2026
Purity
78.1%
Quantity
10 mg → 7.81 mg
Lab
Harrens Lab
Vial
White,Black, Yellow label, Silver crimp, Clear Blue cap
Date
9/15/2026
Purity
77.7%
Quantity
10 mg → 7.77 mg
Lab
Harrens Lab
Vial
White,Black, Yellow label, Silver crimp, Red cap
Date
9/4/2026
Purity
98.3%
Quantity
10 mg → 10.3 mg
Lab
Krause Analytical
Vial
White, Yellow label / Silver crimp / Red cap
Date
9/4/2026
Purity
98.8%
Quantity
10 mg → 10.2 mg
Lab
Krause Analytical
Vial
White, Yellow label / Silver crimp / Blue cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| RetatrutideSilver crimp / Green cap | 10/12/2026 | 10.0 | 99.99% | 10 mg → 11.18 mg | PharmLabs | View |
| TB-500White,Black, Yellow label, Silver crimp, Clear Blue cap | 9/15/2026 | 7.8 | 78.1% | 10 mg → 7.81 mg | Harrens Lab | View |
| BPC-157White,Black, Yellow label, Silver crimp, Red cap | 9/15/2026 | 7.8 | 77.7% | 10 mg → 7.77 mg | Harrens Lab | View |
| BPC-157White, Yellow label / Silver crimp / Red cap | 9/4/2026 | 9.8 | 98.3% | 10 mg → 10.3 mg | Krause Analytical | View |
| IpamorelinWhite, Yellow label / Silver crimp / Blue cap | 9/4/2026 | 9.9 | 98.8% | 10 mg → 10.2 mg | Krause Analytical | View |
Semaglutide and TB-500 lead
Peptide Crafters has 43 independent tests from five labs, run between December 2024 and June 2026. Semaglutide graded A across 10 samples, and TB-500 also graded A.
Retatrutide and Ipamorelin graded C. Tirzepatide graded D. CJC-1295, BPC-157 and Melanotan II graded E.
Fill ran high more often than low: 29 of 43 measured vials came in more than 5% over label, and 5 more than 5% under. Median purity was 99.8%.
Buying from Peptide Crafters
If you order here, Semaglutide has the deepest strong record. For Tirzepatide and the E-graded peptides, compare the better-tested options on this page first.
We don't track Peptide Crafters prices yet. Check the cost per mg on its site before you order.
What to check before you pay
- The lot on the vial matches the certificate - Grades by product: they range from A to E here - Measured amount versus the label - The refund policy before you order
Track Peptide Crafters
Create a free account to save this vendor, get alerts for new lab tests, and watch price changes.
Peptide Crafters: common questions
Is Peptide Crafters legit?
We rate lab records, not businesses. Mixed lab record: 60 independent tests, 53 of 60 lots filled to label, median purity 99.73%, 6 of 9 products graded D or E. Each result links to its original certificate in the table above.
What do Peptide Crafters reviews say?
We don't hold scored customer reviews for Peptide Crafters yet. The independent lab results on this page are the evidence we have.
Which Peptide Crafters peptides tested best?
We have graded 9 Peptide Crafters products. Semaglutide graded A or B. Tesamorelin, TB-500, Tirzepatide, Melanotan II, BPC-157 and CJC-1295 graded D or E.
Is there a Peptide Crafters coupon or discount code?
We don't have a verified Peptide Crafters coupon or discount code. A discount changes the price, not what is in the vial.
Where does Peptide Crafters ship from?
Public listings place Peptide Crafters's shipping origin in United States. Check the shop's own shipping page before ordering, as origin can change.
Ordering from Peptide Crafters?
Mixed lab record: 60 independent tests, 53 of 60 lots filled to label, median purity 99.73%, 6 of 9 products graded D or E.