Peptide Sciences
Finnrick has tested 129 samples from Peptide Sciences across 10 products.
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Products
| Tests | ||||||||
|---|---|---|---|---|---|---|---|---|
| Product | Rating | Count | Avg | Min | Max | Oldest | Most Recent | |
| BPC-157 | 13 | 17 Dec 2024 | 4 Feb 2026 | |||||
| Ipamorelin | 9 | 13 Feb 2025 | 20 May 2025 | |||||
| PT-141 | 6 | 7 May 2025 | 12 Aug 2025 | |||||
| GHK-Cu | 6 | 6 May 2025 | 26 Feb 2026 | |||||
| Semaglutide | 15 | 17 Dec 2024 | 1 Mar 2026 | |||||
| Melanotan II | 10 | 19 Feb 2025 | 19 Feb 2025 | |||||
| Tirzepatide | 16 | 28 Mar 2025 | 3 Mar 2026 | |||||
| CJC-1295 | 11 | 19 Feb 2025 | 6 May 2026 | |||||
| Retatrutide | 40 | 17 Dec 2024 | 28 Apr 2026 | |||||
| Tesamorelin | 3 | 9 Oct 2025 | 28 Apr 2026 | |||||
The Peptide Sciences 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 12 overall satisfaction reports
People who submitted test requests to Finnrick gave Peptide Sciences an average satisfaction rating of 4.5 out of 5 across 12 reports associated with samples received and tested by Finnrick. Customers rated payment methods (4.0/5) and delivery speed (4.1/5) comparatively lower.
Most recent Peptide Sciences tests
Samples are tested in commercial labs
tests
products
Scores
First
Last
| Quantity | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Test Date | Product | Certificate | Variant | Test Score | Label | Tested | Difference | Purity | Endotoxins | Batch ID | Container | Tested At | Sent By |
| 6 May 2026 | CJC-1295 | View | NO DAC | 5mg | ⚠️ Sample does not contain CJC-1295 (NO DAC) | n/a | PS6HRI22 | White Label / Silver Crimp / Clear Cap | Lab E | Public | |||
| 28 Apr 2026 | Retatrutide | View | 20mg | ⚠️ Sample does not contain Retatrutide | n/a | (no batch ID) | No Label / Silver Crimp / Blue Cap | Lab E | Public | ||||
| 28 Apr 2026 | Tesamorelin | View | 10mg | ⚠️ Sample does not contain Tesamorelin | n/a | (no batch ID) | No Label / Silver Crimp / White Cap | Lab E | Public | ||||
| 28 Apr 2026 | Retatrutide | View | 12mg | ⚠️ Sample does not contain Retatrutide | n/a | PS6HRP22 | White Label / Silver Crimp / Clear Cap | Lab E | Public | ||||
| 2 Apr 2026 | Retatrutide | View | 12mg | ⚠️ Sample does not contain Retatrutide | n/a | 01.01.2025 | White Label / Silver Crimp / Gray Cap | Lab G | Public | ||||
| 3 Mar 2026 | Tirzepatide | View | 30mg | 33.7mg | +12.3% | 99.40% | n/a | 01/14/2026 | No Label / Copper Crimp / Clear Cap | Lab E | Public | ||
| 2 Mar 2026 | Retatrutide | View | 14mg | 13.3mg | -5.0% | 99.90% | low | (no batch ID) | No Label / Silver Crimp / Black Cap | Lab E | Public | ||
Corrections
- 6 May 2026: Retatrutide
- Data for sample 4z9e34c and 86nyk43 were swapped following a clerical error by Finnrick. On 6 May, the error was corrected.
- 6 May 2026: Tesamorelin
- Data for sample hv46bd2 and f7qjrbk were swapped following a clerical error by Finnrick. On 6 May, the error was corrected.
- 17 Nov 2025: Retatrutide
- Test results for sample 3tbve3d were published from 31 Oct to 17 Nov 2025, but did not belong to Peptide Sciences: the sample was misidentified, and re-attributed to the correct vendor.
- 17 Nov 2025: GHK-Cu
- Test results for sample rkh8jub were published from 31 Oct to 17 Nov 2025, but did not belong to Peptide Sciences: the sample was misidentified, and re-attributed to the correct vendor.
- 17 Nov 2025: Semaglutide
- Test results for sample cjkyg7x were published from 31 Oct to 17 Nov 2025, but did not belong to Peptide Sciences: the sample was misidentified, and re-attributed to the correct vendor.
- 17 Nov 2025: Tesamorelin
- Test results for sample pst3r4y were published from 31 Oct to 17 Nov 2025, but did not belong to Peptide Sciences: the sample was misidentified, and re-attributed to the correct vendor.
- 14 Nov 2025: Retatrutide
- Test results for sample 87u9z6r were published from 8 to 14 Nov 2025, but did not belong to Peptide Sciences: the sample was identified as a counterfeit. They were removed from publishing.
- 29 Aug 2025: Retatrutide
- Batch identifier for Peptide Sciences Retatrutide 6mg vial tested 30 June was missing. Test score changed from 6.3 to 8.3.
- 29 Aug 2025: Tirzepatide
- Peptide Sciences have notified Finnrick that they do not distribute 60mg Tirzepatide. The sample submitted in this quantity, tested 17 July, was therefore removed from the site and is no longer part of the Finnrick Rating.
- 6 Apr 2025: CJC-1295
- Lab A test 19 Feb 2025: updated compound identification, removed purity/quantity. Error in data transcription by Finnrick: compound was incorrectly reported as CJC-1295.
- 6 Apr 2025: Retatrutide
- Lab A test 14 Feb 2025: updated compound identification, removed purity and quantity values. Error in analysis by Lab, compound was incorrectly identified as Retatrutide. Lab issued an updated test certificate.
About Peptide Sciences Test Results From Finnrick
Peptide Sciences 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 10 products and 129 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 Sciences Testing Activity & Score Summary
In the past 30 days, Finnrick has published 1 new test result for Peptide Sciences, and 5 in the past three months. The overall dataset includes 129 tested samples with an average score of 6.6/10 across all products.
Across 129 identity-tested samples, 85% were confirmed to contain the expected peptide (identity pass rate). Among those that passed, median purity was 99.7%. Approximately 100% of passing samples tested at or above 98% purity.
Here is a closer look at the most frequently tested products (top 3):
- Retatrutide (40 tests, 68% identity pass, median purity 99.7%) — Test scores are highly variable, ranging from 0.0 to 10.0 (average 5.8/10), suggesting significant batch-to-batch differences.
- Tirzepatide (16 tests, 100% identity pass, median purity 99.7%) — Test scores are highly variable, ranging from 3.8 to 8.0 (average 6.4/10), suggesting significant batch-to-batch differences.
- GHK-Cu (6 tests, 100% identity pass, median purity 99.8%) — Test scores are highly variable, ranging from 5.6 to 9.8 (average 8.2/10), suggesting significant batch-to-batch differences.