Tirz Peptide reviews
4 independent lab tests across 1 product · 99.8% average purity
- 4 HPLC samples across 1 products
- Catalog avg purity 99.8%
- www.tirz-peptide.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 4 measured samples from Tirz Peptide, 2 came in more than 5% under the quantity on the label (50%). Another 1 measured more than 5% over. Purity across 4 readings ran from 99.5% to 99.9%, median 99.9%. Samples span Jan 2026 to Aug 2026.
- Under label
- 2/4
- Median purity
- 99.9%
- Latest sample
- Aug 2026
more than 5% short
99.5%–99.9% range
first tested Jan 2026
Lab testing results
Independent results across 1 product.
Tested products
| Product | Grade | Tests | Avg | Range | Latest | Price | $/mg |
|---|---|---|---|---|---|---|---|
| Retatrutide | AGREAT | 4 | 100.0% | 99.5% – 99.9% | 8/4/2026 | — | — |
Individual lab tests
Date
8/4/2026
Purity
99.9%
Quantity
10 mg → 7.26 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Black cap
Date
4/23/2026
Purity
99.9%
Quantity
30 mg → 33.3 mg
Lab
Krause Analytical
Vial
No Label / Silver Crimp / Purple Cap
Date
2/11/2026
Purity
99.9%
Quantity
20 mg → 19.2 mg
Lab
Krause Analytical
Vial
No Label / Silver Crimp / Red Cap
Date
1/26/2026
Purity
99.5%
Quantity
20 mg → 18.2 mg
Lab
Krause Analytical
Vial
No Label / Silver Crimp / Red Cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| RetatrutideNo label / Silver crimp / Black cap | 8/4/2026 | 10.0 | 99.9% | 10 mg → 7.26 mg | Krause Analytical | View |
| RetatrutideNo Label / Silver Crimp / Purple Cap | 4/23/2026 | 10.0 | 99.9% | 30 mg → 33.3 mg | Krause Analytical | View |
| RetatrutideNo Label / Silver Crimp / Red Cap | 2/11/2026 | 10.0 | 99.9% | 20 mg → 19.2 mg | Krause Analytical | View |
| RetatrutideNo Label / Silver Crimp / Red Cap | 1/26/2026 | 9.9 | 99.5% | 20 mg → 18.2 mg | Krause Analytical | View |
About Tirz Peptide
Finnrick has tested 4 samples from Tirz Peptide across 1 products.