Peptide-S
Finnrick has tested 128 samples from Peptide-S across 11 products.
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Products
| Tests | ||||||||
|---|---|---|---|---|---|---|---|---|
| Product | Rating | Count | Avg | Min | Max | Oldest | Most Recent | |
| Mazdutide | 4 | 16 Jul 2025 | 25 Nov 2025 | |||||
| Survodutide | 4 | 16 Jul 2025 | 25 Nov 2025 | |||||
| Ipamorelin | 4 | 5 Aug 2025 | 20 Feb 2026 | |||||
| Semaglutide | 5 | 16 Jul 2025 | 15 Jan 2026 | |||||
| Cagrilintide | 4 | 14 Jun 2025 | 25 Nov 2025 | |||||
| GHK-Cu | 8 | 16 Jul 2025 | 22 Feb 2026 | |||||
| Sermorelin | 3 | 24 Jul 2025 | 20 Feb 2026 | |||||
| Tesamorelin | 7 | 13 Jun 2025 | 15 Jan 2026 | |||||
| Tirzepatide | 39 | 9 Jun 2025 | 4 Mar 2026 | |||||
| BPC-157 | 5 | 16 Jul 2025 | 18 Sep 2025 | |||||
| Retatrutide | 41 | 11 Jun 2025 | 10 Mar 2026 | |||||
The Peptide-S samples tested by Finnrick were either acquired by Finnrick directly, or submitted by the public.
Customer Reviews
These indicators of customer satisfaction are based on reports submitted by the public through the Finnrick testing program, and are not verified.
Based on 15 overall satisfaction reports
People who submitted test requests to Finnrick gave Peptide-S an average satisfaction rating of 4.9 out of 5 across 15 reports associated with samples received and tested by Finnrick. Customers rated delivery speed (4.1/5) comparatively lower.
Most recent Peptide-S tests
Samples are tested in commercial labs
tests
products
Scores
First
Last
| Quantity | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Product | Certificate | Test Score | Label | Tested | Difference | Purity | Batch ID | Container | Tested At | Sent By |
| 10 Mar 2026 | Retatrutide | View | 20mg | 19.7mg | -1.5% | 99.90% | (no batch ID) | No Label / Silver Crimp / Violet Cap | Lab E | Public | |
| 4 Mar 2026 | Tirzepatide | View | 60mg | 56.3mg | -6.2% | 99.90% | Jan 2, 2026 | No Label / Silver Crimp / Orange Cap | Lab E | Public | |
| 2 Mar 2026 | Tirzepatide | View | 30mg | 35.2mg | +17.3% | 99.90% | Jan 2, 2026 | No Label / Silver Crimp / Black Cap | Lab E | Public | |
| 2 Mar 2026 | Tirzepatide | View | 20mg | 20mg | 99.90% | Jan 2, 2026 | No Label / Silver Crimp / Violet Cap | Lab E | Public | ||
| 26 Feb 2026 | Tirzepatide | View | 40mg | 41mg | +2.5% | 99.90% | Jan.2,2026 | No Label / Silver Crimp / Clear Green Cap | Lab E | Public | |
| 22 Feb 2026 | Retatrutide | View | 30mg | 32.4mg | +8.0% | 99.41% | Dec2, 15. 2025 | (no data) | Lab E | Public | |
| 22 Feb 2026 | GHK-Cu | View | 100mg | 100mg | 99.76% | Dec2, 15. 2025 | (no data) | Lab E | Public | ||
Corrections
- 1 Aug 2025: Survodutide
- Peptide-S Survodutide results are being reviewed, will be updated soon.
- 1 Aug 2025: Mazdutide
- Peptide-S Mazdutide results are being reviewed, will be updated soon.
About Peptide-S Test Results From Finnrick
Peptide-S is a peptide vendor with multiple products tracked in the independent testing dataset collected by Finnrick. This page compiles recent, batch-level test results across 11 products and 128 tests, including scores, test dates, batch IDs, and lab details. This enables you to compare quality over time, not just marketing claims.
Each tested sample receives a 0–10 score, with 10 being the best possible value. It is the total of three components: purity (0–4 points), quantity accuracy vs. the label or batch claim (0–4 points), and batch information quality (0–2 points).
When several test results are available for a product and vendor pair, you’ll also find a Finnrick Rating (A–E, where A is best and E is worst, X if an insufficient number of tests is available, or F in rare cases of documented and widespread fraud) and customer satisfaction reports with sub-scores that provide additional context. Use the table above to review purity, quantity accuracy, consistency between batches, and any notable outliers surfaced in Finnrick testing data.
Peptide-S Testing Activity & Score Summary
In the past 30 days, Finnrick has published no new test results for Peptide-S. The overall dataset includes 128 tested samples with an average score of 7.2/10 across all products.
Across 124 identity-tested samples, 98% were confirmed to contain the expected peptide (identity pass rate). Among those that passed, median purity was 99.8%. Approximately 96% of passing samples tested at or above 98% purity.
Here is a closer look at the most frequently tested products (top 3):
- Retatrutide (41 tests, 95% identity pass, median purity 99.7%) — Test scores are highly variable, ranging from 0.0 to 10.0 (average 7.0/10), suggesting significant batch-to-batch differences.
- Tirzepatide (39 tests, 100% identity pass, median purity 99.9%) — Test scores are highly variable, ranging from 3.4 to 10.0 (average 7.9/10), suggesting significant batch-to-batch differences.
- Tesamorelin (7 tests, 100% identity pass, median purity 97.2%) — Test scores are highly variable, ranging from 3.5 to 8.0 (average 5.4/10), suggesting significant batch-to-batch differences.