Marvel Pep reviews
18 independent lab tests across 2 products · 99.8% average purity
- 18 HPLC samples across 2 products
- Catalog avg purity 99.8%
- marvelpep.com
- Independent testing, no pay-to-rank
Boren Health independently tests products and verifies reviews. Public methodology, no pay-to-rank.
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What the testing shows
Across 18 measured samples from Marvel Pep, 5 came in more than 5% under the quantity on the label (28%). Another 6 measured more than 5% over. Purity across 18 readings ran from 99.2% to 99.95%, median 99.81%. Samples span Dec 2025 to Aug 2026.
- Under label
- 5/18
- Median purity
- 99.81%
- Latest sample
- Aug 2026
- Ships from
- China
more than 5% short
99.2%–99.95% range
first tested Dec 2025
per vendor listing
Lab testing results
Independent results across 2 products.
Tested products
| Product | Grade | Tests | Avg | Range | Latest | Price | $/mg |
|---|---|---|---|---|---|---|---|
| GHK-Cu | AGREAT | 4 | 100.0% | 99.9% – 99.9% | 7/13/2026 | — | — |
| Retatrutide | AGREAT | 14 | 92.9% | 99.2% – 99.9% | 8/3/2026 | — | — |
Individual lab tests
Date
8/3/2026
Purity
99.9%
Quantity
40 mg → 34 mg
Lab
Krause Analytical
Vial
White label / Blue crimp / Clear cap
Date
7/30/2026
Purity
99.8%
Quantity
20 mg → 21.2 mg
Lab
BTLabs
Vial
No Label / Silver Crimp / White Cap
Date
7/13/2026
Purity
99.2%
Quantity
10 mg → 10.8 mg
Lab
Krause Analytical
Vial
No label / Copper crimp / Clear cap
Date
7/13/2026
Purity
99.9%
Quantity
50 mg → 40.7 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Blue cap
Date
6/8/2026
Purity
99.8%
Quantity
30 mg → 30.4 mg
Lab
BTLabs
Vial
No label / Silver crimp / Blue cap
Date
6/2/2026
Purity
99.9%
Quantity
10 mg → 9.79 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / White cap
Date
4/2/2026
Purity
99.6%
Quantity
20 mg → 20.4 mg
Lab
BTLabs
Vial
Gray Label / Copper Crimp / Clear Cap
Date
3/7/2026
Purity
99.8%
Quantity
20 mg → 21.7 mg
Lab
BTLabs
Vial
No Label / Silver Crimp / Clear Green Cap
Date
3/2/2026
Purity
99.9%
Quantity
100 mg → 88.2 mg
Lab
Krause Analytical
Vial
No Label / Silver Crimp / Red Cap
Date
2/18/2026
Purity
99.9%
Quantity
20 mg → 17.6 mg
Lab
Krause Analytical
Vial
No Label / Gold Crimp / Clear Cap
Date
2/11/2026
Purity
99.9%
Quantity
50 mg → 49.4 mg
Lab
Krause Analytical
Vial
No Label / Silver Crimp / Blue Cap
Date
2/11/2026
Purity
99.9%
Quantity
10 mg → 10.6 mg
Lab
Krause Analytical
Vial
No Label / Silver Crimp / Yellow Cap
Date
2/4/2026
Purity
99.7%
Quantity
20 mg → 20.2 mg
Lab
BTLabs
Vial
No Label / Copper Crimp / Clear Cap
Date
1/26/2026
Purity
99.7%
Quantity
20 mg → 20.4 mg
Lab
Krause Analytical
Vial
No Label / Gold Crimp / Clear Cap
Date
1/26/2026
Purity
99.8%
Quantity
30 mg → 28 mg
Lab
BTLabs
Vial
No Label / Silver Crimp / Clear Blue Cap
Date
12/23/2025
Purity
99.83%
Quantity
10 mg → 10.8 mg
Lab
Krause Analytical
Vial
No Label / Silver Crimp / Yellow Cap
Date
12/17/2025
Purity
99.95%
Quantity
100 mg → 110 mg
Lab
Krause Analytical
Vial
No Label / Silver Crimp / Red Cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| RetatrutideWhite label / Blue crimp / Clear cap | 8/3/2026 | 10.0 | 99.9% | 40 mg → 34 mg | Krause Analytical | View |
| RetatrutideNo Label / Silver Crimp / White Cap | 7/30/2026 | 10.0 | 99.8% | 20 mg → 21.2 mg | BTLabs | View |
| RetatrutideNo label / Copper crimp / Clear cap | 7/13/2026 | 9.9 | 99.2% | 10 mg → 10.8 mg | Krause Analytical | View |
| GHK-CuNo label / Silver crimp / Blue cap | 7/13/2026 | 10.0 | 99.9% | 50 mg → 40.7 mg | Krause Analytical | View |
| RetatrutideNo label / Silver crimp / Blue cap | 6/8/2026 | 10.0 | 99.8% | 30 mg → 30.4 mg | BTLabs | View |
| RetatrutideNo label / Silver crimp / White cap | 6/2/2026 | 10.0 | 99.9% | 10 mg → 9.79 mg | Krause Analytical | View |
| RetatrutideGray Label / Copper Crimp / Clear Cap | 4/2/2026 | 10.0 | 99.6% | 20 mg → 20.4 mg | BTLabs | View |
| RetatrutideNo Label / Silver Crimp / Clear Green Cap | 3/7/2026 | 10.0 | 99.8% | 20 mg → 21.7 mg | BTLabs | View |
| GHK-CuNo Label / Silver Crimp / Red Cap | 3/2/2026 | 10.0 | 99.9% | 100 mg → 88.2 mg | Krause Analytical | View |
| RetatrutideNo Label / Gold Crimp / Clear Cap | 2/18/2026 | 10.0 | 99.9% | 20 mg → 17.6 mg | Krause Analytical | View |
| GHK-CuNo Label / Silver Crimp / Blue Cap | 2/11/2026 | 10.0 | 99.9% | 50 mg → 49.4 mg | Krause Analytical | View |
| RetatrutideNo Label / Silver Crimp / Yellow Cap | 2/11/2026 | 10.0 | 99.9% | 10 mg → 10.6 mg | Krause Analytical | View |
| RetatrutideNo Label / Copper Crimp / Clear Cap | 2/4/2026 | 10.0 | 99.7% | 20 mg → 20.2 mg | BTLabs | View |
| RetatrutideNo Label / Gold Crimp / Clear Cap | 1/26/2026 | 10.0 | 99.7% | 20 mg → 20.4 mg | Krause Analytical | View |
| RetatrutideNo Label / Silver Crimp / Clear Blue Cap | 1/26/2026 | 10.0 | 99.8% | 30 mg → 28 mg | BTLabs | View |
| RetatrutideNo Label / Silver Crimp / Yellow Cap | 12/23/2025 | 10.0 | 99.83% | 10 mg → 10.8 mg | Krause Analytical | View |
| GHK-CuNo Label / Silver Crimp / Red Cap | 12/17/2025 | 10.0 | 99.95% | 100 mg → 110 mg | Krause Analytical | View |
| Retatrutide | 12/16/2025 | 10.0 | 99.7% | 10 mg → 9.8 mg | BTLabs | View |
About Marvel Pep
Finnrick has tested 18 samples from Marvel Pep across 2 products.
Contact
- China
- marvelpep.com