YuYi peptide reviews
8 independent lab tests across 2 products · 99.7% average purity
- 8 HPLC samples across 2 products
- Catalog avg purity 99.7%
- hunmer.github.io/yuyi-peptide
- 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 5 measured samples from YuYi peptide, 0 came in more than 5% under the quantity on the label (0%). Purity across 6 readings ran from 99.3% to 99.8%, median 99.75%. Samples span Oct 2025 to Jun 2026.
- Under label
- 0/5
- Median purity
- 99.75%
- Latest sample
- Jun 2026
- Ships from
- China
more than 5% short
99.3%–99.8% range
first tested Oct 2025
per vendor listing
Lab testing results
Independent results across 2 products.
Tested products
| Product | Grade | Tests | Avg | Range | Latest | Price | $/mg |
|---|---|---|---|---|---|---|---|
| Retatrutide | COKAY | 4 | 75.0% | 99.7% – 99.8% | 6/16/2026 | — | — |
| Tirzepatide | DPOOR | 4 | 66.7% | 99.3% – 99.8% | 6/16/2026 | — | — |
Individual lab tests
Date
6/16/2026
Purity
99.7%
Quantity
5 mg → 5.1 mg
Lab
BTLabs
Vial
White label / Silver crimp / Yellow cap
Date
6/16/2026
Purity
—
Quantity
—
Lab
BTLabs
Vial
White label / Silver crimp / Blue cap
Date
6/8/2026
Purity
99.3%
Quantity
5 mg → 10 mg
Lab
BTLabs
Vial
Clear label / Silver crimp / Yellow cap
Date
1/22/2026
Purity
99.8%
Quantity
15 mg → 14.9 mg
Lab
BTLabs
Vial
White Label / Silver Crimp / Blue Cap
Date
1/22/2026
Purity
99.8%
Quantity
10 mg → 9.8 mg
Lab
BTLabs
Vial
White Label / Silver Crimp / Green Cap
Date
1/15/2026
Purity
99.7%
Quantity
10 mg → 9.9 mg
Lab
BTLabs
Vial
No Label / Silver Crimp / Teal Cap
Date
12/29/2025
Purity
—
Quantity
—
Lab
Krause Analytical
Vial
No Label / Silver Crimp / Blue Cap
Date
10/3/2025
Purity
99.8%
Quantity
10 mg → 9.58 mg
Lab
Krause Analytical
Vial
No Label / Silver Crimp / Black Cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| RetatrutideWhite label / Silver crimp / Yellow cap | 6/16/2026 | 10.0 | 99.7% | 5 mg → 5.1 mg | BTLabs | View |
| TirzepatideWhite label / Silver crimp / Blue cap | 6/16/2026 | — | — | BTLabs | View | |
| TirzepatideClear label / Silver crimp / Yellow cap | 6/8/2026 | 9.9 | 99.3% | 5 mg → 10 mg | BTLabs | View |
| TirzepatideWhite Label / Silver Crimp / Blue Cap | 1/22/2026 | 10.0 | 99.8% | 15 mg → 14.9 mg | BTLabs | View |
| RetatrutideWhite Label / Silver Crimp / Green Cap | 1/22/2026 | 10.0 | 99.8% | 10 mg → 9.8 mg | BTLabs | View |
| RetatrutideNo Label / Silver Crimp / Teal Cap | 1/15/2026 | 10.0 | 99.7% | 10 mg → 9.9 mg | BTLabs | View |
| RetatrutideNo Label / Silver Crimp / Blue Cap | 12/29/2025 | — | — | Krause Analytical | View | |
| TirzepatideNo Label / Silver Crimp / Black Cap | 10/3/2025 | 10.0 | 99.8% | 10 mg → 9.58 mg | Krause Analytical | View |
About YuYi peptide
Finnrick has tested 8 samples from YuYi peptide across 2 products.