In stock10-pack
Is Peptide Partners Legit
Is Peptide Partners a legit peptide vendor? 105 independent lab tests across 10 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Lab record: Mixed
How we rate- 105 independent tests
- 64 of 103 lots filled to label
- Median purity 99.8%
- 5 of 10 products graded D or E
Some of Peptide Partners's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested Semaglutide
Peptide Partners 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 Peptide Partners 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.
Semaglutide
Peptide Partners: grade ETesamorelin
Peptide Partners: grade ECJC-1295
Peptide Partners: grade EPeptide Partners 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 Peptide Partners' site.
- RetatrutideAGREAT
- Tests
- 32
- Passed
- 96.9%
- Price/mg
- —
- IpamorelinAGREAT
- Tests
- 10
- Passed
- 100.0%
- Price/mg
- $2.89 / mg
- SermorelinAGREAT
- Tests
- 2
- Passed
- 100.0%
- Price/mg
- —
- TirzepatideBGOOD
- Tests
- 8
- Passed
- 85.7%
- Price/mg
- —
- GHK-CuBGOOD
- Tests
- 6
- Passed
- 83.3%
- Price/mg
- $0.45 / mg
- BPC-157DPOOR
- Tests
- 11
- Passed
- 63.6%
- Price/mg
- $3.90 / mg
- TB-500EBAD
- Tests
- 13
- Passed
- 30.8%
- Price/mg
- $4.90 / mg
- TesamorelinEBAD
- Tests
- 12
- Passed
- 50.0%
- Price/mg
- —
- CJC-1295EBAD
- Tests
- 9
- Passed
- 44.4%
- Price/mg
- $4.44 / mg
- SemaglutideEBAD
- Tests
- 2
- Passed
- 50.0%
- Price/mg
- $4.88 / mg
What the testing shows
Across 103 measured samples from Peptide Partners, 39 came in more than 5% under the quantity on the label (38%). Another 30 measured more than 5% over. Purity across 104 readings ran from 86.51% to 100%, median 99.8%. Samples span Jun 2025 to Oct 2026.
- Under label
- 39/103
- Median purity
- 99.8%
- Latest sample
- Oct 2026
more than 5% short
86.51%–100% range
first tested Jun 2025
Listing status. Finnrick, the lab-results database these tests come from, flags payment problems with this shop. Other closed and offline shops
Our read on Peptide Partners
76 of Peptide Partners' 104 graded samples passed (73%), and 88% 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 66% before.
When a sample failed, the most common reason was purity under 99.5% (25 times).
Against the 302 shops with at least five graded tests, Peptide Partners' pass rate is at or above 53% of them, and it has more tests on record than 92% of them.
When and how Peptide Partners was tested
Samples per month. The darker part of each bar failed.
Nov '25
Dec '25
Jan '26
Feb '26
Mar '26
Apr '26
May '26
Jun '26
Jul '26
Aug '26
Sep '26
Oct '26
- Labs used
- Krause Analytical (76), BTLabs (16), Chromate (7), MZ Biolabs (3)
- Who sent the samples
- buyers 88%, the shop itself 12%
- Batches covered
- 36 distinct batch numbers; 37 checked for endotoxins
Why Peptide Partners' failed samples failed
The 6 most recent failed tests, with the lab's reason.
GHK-Cu · Sep 9, 2026
amount in the vial more than 35% off the label
Tesamorelin · Aug 5, 2026
purity under 99.5%
TB-500 Thymosin Beta-4 · Jul 20, 2026
purity under 99.5%
BPC-157 · Apr 28, 2026
purity under 99.5%
BPC-157 · Mar 4, 2026
purity under 99.5%
TB-500 Thymosin Beta-4 · Mar 4, 2026
purity under 99.5%
Catalog & prices
Every peptide and vial size Peptide Partners currently sells. Prices refresh weekly.
Sort
Showing 1–24 of 56 productsPrices refreshed weekly · Direct from Peptide Partners
- In stock10-pack
- In stock5-pack
- In stock2-pack
Sold out20-pack- Sold out10-pack
- Sold out5-pack
- Sold out2-pack
In stock20-pack- In stock15-pack
- In stock10-pack
- In stock5-pack
In stock20-pack- In stock10-pack
- In stock5-pack
- In stock2-pack
In stock20-pack- In stock10-pack
- In stock5-pack
- In stock2-pack
Sold out10-pack- Sold out5-pack
- Sold out2-pack
In stock20-pack- In stock10-pack
Lab testing results
Independent results across 10 products.
105
Total lab tests
99.4%
Avg purity
100.0%
Best score
86.5%
Worst score
Individual lab tests
Retatrutide10.0
Date
10/14/2026
Purity
99.99%
Quantity
24 mg → 21.8 mg
Lab
PharmLabs
Vial
Silver crimp / Purple cap
Retatrutide10.0
Date
10/12/2026
Purity
99.99%
Quantity
24 mg → 22.34 mg
Lab
PharmLabs
Vial
Silver crimp / Purple cap
Retatrutide9.9
Date
9/24/2026
Purity
99.5%
Quantity
12 mg → 10.8 mg
Lab
Krause Analytical
Vial
White label / Red crimp / Clear Pink cap
Tirzepatide10.0
Date
9/24/2026
Purity
99.9%
Quantity
40 mg → 39.5 mg
Lab
Krause Analytical
Vial
White label / Silver crimp / Green cap
Retatrutide10.0
Date
9/24/2026
Purity
99.9%
Quantity
24 mg → 21.1 mg
Lab
Krause Analytical
Vial
White label / Silver crimp / Violet cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| RetatrutideSilver crimp / Purple cap | 10/14/2026 | 10.0 | 99.99% | 24 mg → 21.8 mg | PharmLabs | View |
| RetatrutideSilver crimp / Purple cap | 10/12/2026 | 10.0 | 99.99% | 24 mg → 22.34 mg | PharmLabs | View |
| RetatrutideWhite label / Red crimp / Clear Pink cap | 9/24/2026 | 9.9 | 99.5% | 12 mg → 10.8 mg | Krause Analytical | View |
| TirzepatideWhite label / Silver crimp / Green cap | 9/24/2026 | 10.0 | 99.9% | 40 mg → 39.5 mg | Krause Analytical | View |
| RetatrutideWhite label / Silver crimp / Violet cap | 9/24/2026 | 10.0 | 99.9% | 24 mg → 21.1 mg | Krause Analytical | View |
Which Peptide Partners products tested best
Ipamorelin, Sermorelin, Retatrutide, Tirzepatide and GHK-Cu have the strongest record, graded A or B.
BPC-157, Semaglutide, Tesamorelin, CJC-1295 and TB-500 graded D or E: a large share of their samples missed purity or quantity thresholds.
Buying from Peptide Partners
If you order from Peptide Partners, the A- and B-graded products are the safer picks on this record. For the weaker ones, the better-tested options on this page come from other shops.
We track 56 listings from Peptide Partners with current prices, so you can compare price per mg before you buy.
The official store is peptide.partners. Check the address before you pay.
What to check before you pay
- The lot number on the vial matches the certificate
- The certificate names the lab and the test date
- Fill versus label, not purity alone
- A refund policy in writing
Track Peptide Partners
Create a free account to save this vendor, get alerts for new lab tests, and watch price changes.
Peptide Partners: common questions
Is Peptide Partners legit?
We rate lab records, not businesses. Mixed lab record: 105 independent tests, 64 of 103 lots filled to label, median purity 99.8%, 5 of 10 products graded D or E. Each result links to its original certificate in the table above.
What do Peptide Partners reviews say?
We don't hold scored customer reviews for Peptide Partners yet. The independent lab results on this page are the evidence we have.
Which Peptide Partners peptides tested best?
We have graded 10 Peptide Partners products. Ipamorelin, Sermorelin, Retatrutide, Tirzepatide and GHK-Cu graded A or B. BPC-157, Semaglutide, Tesamorelin, CJC-1295 and TB-500 graded D or E.
Is there a Peptide Partners coupon code?
We don't have a verified Peptide Partners coupon code. A discount changes the price, not what is in the vial, so compare price per mg in the catalog above.
Ordering from Peptide Partners?
Mixed lab record: 105 independent tests, 64 of 103 lots filled to label, median purity 99.8%, 5 of 10 products graded D or E.