Zen Peptides
Finnrick has tested 19 samples from Zen Peptides across 3 products.
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Products
| Tests | ||||||||
|---|---|---|---|---|---|---|---|---|
| Product | Rating | Count | Avg | Min | Max | Oldest | Most Recent | |
| GHK-Cu | 4 | 23 Oct 2025 | 17 Dec 2025 | |||||
| Retatrutide | 9 | 23 Oct 2025 | 3 Mar 2026 | |||||
| Tesamorelin | 6 | 4 Nov 2025 | 19 Feb 2026 | |||||
The Zen Peptides 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 7 overall satisfaction reports
People who submitted test requests to Finnrick gave Zen Peptides an average satisfaction rating of 4.6 out of 5 across 7 reports associated with samples received and tested by Finnrick.
Most recent Zen Peptides tests
Samples are tested in commercial labs
tests
products
Scores
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| Quantity | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Product | Certificate | Test Score | Label | Tested | Difference | Purity | Endotoxins | Batch ID | Container | Tested At | Sent By |
| 3 Mar 2026 | Retatrutide | View | 30mg | 25mg | -16.7% | 99.78% | low | (no batch ID) | White Label / Silver Crimp / Black Cap | Lab E | Public | |
| 3 Mar 2026 | Retatrutide | View | 10mg | 9.88mg | -1.2% | 99.81% | low | (no batch ID) | No Label / Silver Crimp / Clear Blue Cap | Lab E | Public | |
| 19 Feb 2026 | Tesamorelin | View | 10mg | 8.51mg | -14.9% | 98.00% | below LOQ | (no batch ID) | White Label / Silver Crimp / White Cap | Lab E | Public | |
| 15 Feb 2026 | Tesamorelin | View | 10mg | 12.6mg | +26.0% | 99.70% | n/a | TSM10 | No Label / Silver Crimp / White Cap | Lab G | Public | |
| 10 Feb 2026 | Retatrutide | View | 10mg | 10.5mg | +5.0% | 99.70% | n/a | (no batch ID) | No Label / Silver Crimp / Green Cap | Lab G | Public | |
| 19 Jan 2026 | Tesamorelin | View | 10mg | 8.97mg | -10.3% | 85.72% | n/a | (no batch ID) | No Label / Silver Crimp / Black Cap | Lab E | Public | |
| 7 Jan 2026 | Retatrutide | View | 10mg | 9.8mg | -2.0% | 99.80% | n/a | (no batch ID) | No Label / Silver Crimp / Green Cap | Lab G | Public | |
About Zen Peptides Test Results From Finnrick
Zen Peptides 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 3 products and 19 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.
Zen Peptides Testing Activity & Score Summary
In the past 30 days, Finnrick has published no new test results for Zen Peptides. The overall dataset includes 19 tested samples with an average score of 6.2/10 across all products.
Across 19 identity-tested samples, 100% were confirmed to contain the expected peptide (identity pass rate). Among those that passed, median purity was 99.7%. Approximately 95% of passing samples tested at or above 98% purity.
Here is a closer look at the most frequently tested products (top 3):
- Retatrutide (9 tests, 100% identity pass, median purity 99.7%) — Test scores are highly variable, ranging from 4.2 to 7.8 (average 6.5/10), suggesting significant batch-to-batch differences.
- Tesamorelin (6 tests, 100% identity pass, median purity 98.9%) — Test scores are highly variable, ranging from 2.3 to 7.9 (average 4.9/10), suggesting significant batch-to-batch differences.
- GHK-Cu (4 tests, 100% identity pass, median purity 100.0%) — Test scores are highly variable, ranging from 5.2 to 9.5 (average 7.7/10), suggesting significant batch-to-batch differences.