Simple Peptide Reviews
Simple Peptide review: 47 independent lab tests across 9 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Is Simple Peptide legit? Lab record: Mixed
How we rate- 47 independent tests
- 30 of 43 lots filled to label
- Median purity 99.8%
- 4 of 7 products graded D or E
Some of Simple Peptide's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested Semaglutide
Simple Peptide graded E. Pura Peptides's Semaglutide graded A across 1 test, $5.00 / mg.
Buy from Pura PeptidesAll better-tested optionsPeptide Vendor Reviews independently tests products and verifies reviews. Public methodology, no pay-to-rank.
Better-tested options
Where Simple Peptide graded D or E, these shops' samples of the same peptide graded A or B. Ordered by grade, then price per mg. Partner status never changes the order.
Simple Peptide products we've tested
Best-graded first. Grades come from the share of each product's samples that passed purity and quantity checks. Buy links open Simple Peptide's site.
- TesamorelinAGREAT
- Tests
- 2
- Passed
- 100.0%
- TirzepatideBGOOD
- Tests
- 8
- Passed
- 87.5%
- GHK-CuBGOOD
- Tests
- 5
- Passed
- 80.0%
- RetatrutideDPOOR
- Tests
- 15
- Passed
- 66.7%
- IpamorelinDPOOR
- Tests
- 3
- Passed
- 66.7%
- SemaglutideEBAD
- Tests
- 4
- Passed
- 50.0%
- BPC-157EBAD
- Tests
- 4
- Passed
- 25.0%
- Tests
- 3
- Passed
- —
- Tests
- 3
- Passed
- —
What the testing shows
Across 43 measured samples from Simple Peptide, 13 came in more than 5% under the quantity on the label (30%). Another 17 measured more than 5% over. Purity across 46 readings ran from 96.33% to 99.96%, median 99.8%. Samples span Apr 2025 to Oct 2026.
- Under label
- 13/43
- Median purity
- 99.8%
- Latest sample
- Oct 2026
more than 5% short
96.33%–99.96% range
first tested Apr 2025
Our read on Simple Peptide
28 of Simple Peptide's 47 graded samples passed (60%), and 49% of all samples were sent in by buyers rather than by the shop.
Results are improving: 88% passed over the latest six months, up from 45% before.
When a sample failed, the most common reason was purity under 99.5% (15 times).
1 sample failed identity, meaning the lab could not confirm the vial held the labelled peptide.
Against the 302 shops with at least five graded tests, Simple Peptide's pass rate is at or above 21% of them, and it has more tests on record than 76% of them.
When and how Simple Peptide was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Krause Analytical (18), Chromate (14), Freedom Diagnostics (7), BTLabs (5)
- Who sent the samples
- buyers 49%, testing programme 51%
- Batches covered
- 26 distinct batch numbers; 2 checked for endotoxins
Why Simple Peptide's failed samples failed
The 6 most recent failed tests, with the lab's reason.
GHK-Cu · Sep 4, 2026
purity under 99.5%
Retatrutide · Jul 9, 2026
the lab could not confirm it was the labelled peptide
Tirzepatide · Oct 3, 2025
amount in the vial more than 35% off the label
Retatrutide · May 6, 2025
purity under 99.5%
BPC-157 · May 2, 2025
purity under 99.5%
BPC-157 · May 2, 2025
purity under 99.5%
Lab testing results
Independent results across 9 products.
Individual lab tests
Date
10/8/2026
Purity
99.9%
Quantity
20 mg → 17.7 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Red cap
Date
10/8/2026
Purity
99.9%
Quantity
20 mg → 22.1 mg
Lab
Krause Analytical
Vial
No label / Gold crimp / Blue cap
Date
9/24/2026
Purity
99.9%
Quantity
100 mg → 100 mg
Lab
Krause Analytical
Vial
White, Orange label / Silver crimp / Violet cap
Date
9/5/2026
Purity
99.9%
Quantity
100 mg → 117.2 mg
Lab
BTLabs
Vial
White label, Silver crimp, Black Cap
Date
9/5/2026
Purity
99.6%
Quantity
15 mg → 15.1 mg
Lab
BTLabs
Vial
White label, Silver crimp, Clear Orange Cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| RetatrutideNo label / Silver crimp / Red cap | 10/8/2026 | 10.0 | 99.9% | 20 mg → 17.7 mg | Krause Analytical | View |
| TirzepatideNo label / Gold crimp / Blue cap | 10/8/2026 | 10.0 | 99.9% | 20 mg → 22.1 mg | Krause Analytical | View |
| GHK-CuWhite, Orange label / Silver crimp / Violet cap | 9/24/2026 | 10.0 | 99.9% | 100 mg → 100 mg | Krause Analytical | View |
| TirzepatideWhite label, Silver crimp, Black Cap | 9/5/2026 | 10.0 | 99.9% | 100 mg → 117.2 mg | BTLabs | View |
| BPC-157White label, Silver crimp, Clear Orange Cap | 9/5/2026 | 10.0 | 99.6% | 15 mg → 15.1 mg | BTLabs | View |
Tirzepatide is the only strong result
Simple Peptide has 34 independent tests on file, run between April 2025 and August 2026 at five labs, including Krause Analytical and BTLabs. Tirzepatide is the one product that graded B.
Retatrutide is the most-tested product here, with 12 samples, and it graded E. BPC-157, CJC-1295, Melanotan II and Semaglutide also graded E, and Ipamorelin graded D.
Fill is the weak point. 10 of 30 vials measured for fill came in more than 5% under the label, a third of them.
Buying from Simple Peptide
If you order here, Tirzepatide has the best record. For the other peptides, the better-tested options on this page come from shops whose samples of the same compound graded A or B.
Simple Peptide lists a Florida address. We don't track its prices yet, so check the cost per mg on its site before you buy.
What to check before you pay
- The lot number on the vial matches the certificate - The certificate shows the measured amount, not just purity - Fill versus label on anything other than Tirzepatide - A refund policy in writing
Track Simple Peptide
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Simple Peptide: common questions
Is Simple Peptide legit?
We rate lab records, not businesses. Mixed lab record: 47 independent tests, 30 of 43 lots filled to label, median purity 99.8%, 4 of 7 products graded D or E. Each result links to its original certificate in the table above.
What do Simple Peptide reviews say?
We don't hold scored customer reviews for Simple Peptide yet. The independent lab results on this page are the evidence we have.
Which Simple Peptide peptides tested best?
We have graded 7 Simple Peptide products. Tesamorelin, Tirzepatide and GHK-Cu graded A or B. Retatrutide, Ipamorelin, Semaglutide and BPC-157 graded D or E.
Is there a Simple Peptide coupon or discount code?
We don't have a verified Simple Peptide coupon or discount code. A discount changes the price, not what is in the vial.
Ordering from Simple Peptide?
Mixed lab record: 47 independent tests, 30 of 43 lots filled to label, median purity 99.8%, 4 of 7 products graded D or E.
Contact
- US, FL 33446
- simplepeptide.com