Bulk Peptide Supply Reviews
Bulk Peptide Supply review: 37 independent lab tests across 13 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Is Bulk Peptide Supply legit? Lab record: Mixed
How we rate- 37 independent tests
- 22 of 34 lots filled to label
- Median purity 99.88%
- 3 of 11 products graded D or E
Some of Bulk Peptide Supply's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested Ipamorelin
Bulk Peptide Supply graded E. Peptide Partners's Ipamorelin graded A across 10 tests, $2.89 / mg.
Buy from Peptide PartnersAll better-tested optionsPeptide Vendor Reviews independently tests products and verifies reviews. Public methodology, no pay-to-rank.
Better-tested options
Where Bulk Peptide Supply 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.
Ipamorelin
Bulk Peptide Supply: grade EGHK-Cu
Bulk Peptide Supply: grade ETB-500
Bulk Peptide Supply: grade EBulk Peptide Supply 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 Bulk Peptide Supply's site.
- SemaglutideAGREAT
- Tests
- 5
- Passed
- 100.0%
- Melanotan IIAGREAT
- Tests
- 3
- Passed
- 100.0%
- PT-141AGREAT
- Tests
- 2
- Passed
- 100.0%
- CagrilintideAGREAT
- Tests
- 1
- Passed
- 100.0%
- SermorelinAGREAT
- Tests
- 1
- Passed
- 100.0%
- TirzepatideBGOOD
- Tests
- 5
- Passed
- 80.0%
- BPC-157BGOOD
- Tests
- 5
- Passed
- 80.0%
- RetatrutideCOKAY
- Tests
- 7
- Passed
- 71.4%
- IpamorelinEBAD
- Tests
- 2
- Passed
- 50.0%
- GHK-CuEBAD
- Tests
- 2
- Passed
- 50.0%
- TB-500EBAD
- Tests
- 2
- Passed
- 50.0%
- Tests
- 1
- Passed
- —
- Tests
- 1
- Passed
- —
What the testing shows
Across 34 measured samples from Bulk Peptide Supply, 12 came in more than 5% under the quantity on the label (35%). Another 7 measured more than 5% over. Purity across 36 readings ran from 84.8% to 99.95%, median 99.88%. Samples span Jun 2025 to Oct 2026.
- Under label
- 12/34
- Median purity
- 99.88%
- Latest sample
- Oct 2026
more than 5% short
84.8%–99.95% range
first tested Jun 2025
Our read on Bulk Peptide Supply
28 of Bulk Peptide Supply's 37 graded samples passed (76%), and 86% of all samples were sent in by buyers rather than by the shop.
Results are improving: 100% passed over the latest six months, up from 72% before.
When a sample failed, the most common reason was purity under 99.5% (6 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, Bulk Peptide Supply's pass rate is at or above 63% of them, and it has more tests on record than 69% of them.
When and how Bulk Peptide Supply was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Krause Analytical (32), BTLabs (3), Freedom Diagnostics (1), Chromate (1)
- Who sent the samples
- buyers 86%, the shop itself 14%
- Batches covered
- 20 distinct batch numbers; 3 checked for endotoxins
Why Bulk Peptide Supply's failed samples failed
The 6 most recent failed tests, with the lab's reason.
Retatrutide · Mar 6, 2026
purity under 99.5%
BPC-157 · Dec 10, 2025
purity under 99.5%
Mazdutide · Nov 25, 2025
purity under 99.5%; amount in the vial more than 35% off the label
Tirzepatide · Sep 18, 2025
amount in the vial more than 35% off the label
Ipamorelin · Sep 18, 2025
purity under 99.5%
TB-500 · Aug 21, 2025
purity under 99.5%
Lab testing results
Independent results across 13 products.
Individual lab tests
Date
10/8/2026
Purity
99.9%
Quantity
10 mg → 10.2 mg
Lab
Krause Analytical
Vial
No label / Red crimp / Clear Purple cap
Date
7/1/2026
Purity
99.9%
Quantity
100 mg → 81 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Violet cap
Date
7/1/2026
Purity
99.9%
Quantity
10 mg → 9.13 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / Blue cap
Date
7/1/2026
Purity
99.9%
Quantity
20 mg → 21 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / White cap
Date
6/24/2026
Purity
99.9%
Quantity
10 mg → 13.2 mg
Lab
Krause Analytical
Vial
White label / Silver crimp / Yellow cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| CagrilintideNo label / Red crimp / Clear Purple cap | 10/8/2026 | 10.0 | 99.9% | 10 mg → 10.2 mg | Krause Analytical | View |
| GHK-CuNo label / Silver crimp / Violet cap | 7/1/2026 | 10.0 | 99.9% | 100 mg → 81 mg | Krause Analytical | View |
| BPC-157No label / Silver crimp / Blue cap | 7/1/2026 | 10.0 | 99.9% | 10 mg → 9.13 mg | Krause Analytical | View |
| RetatrutideNo label / Silver crimp / White cap | 7/1/2026 | 10.0 | 99.9% | 20 mg → 21 mg | Krause Analytical | View |
| TB-500White label / Silver crimp / Yellow cap | 6/24/2026 | 10.0 | 99.9% | 10 mg → 13.2 mg | Krause Analytical | View |
Which Bulk Peptide Supply products tested best
Semaglutide, Cagrilintide, PT-141, Sermorelin, Melanotan II, Tirzepatide and BPC-157 have the strongest record, graded A or B.
Retatrutide graded C.
Ipamorelin, GHK-Cu and TB-500 graded D or E: a large share of their samples missed purity or quantity thresholds.
Buying from Bulk Peptide Supply
If you order from Bulk Peptide Supply, 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 don't track Bulk Peptide Supply's prices yet. Shipping, payment and refund terms are on their site.
The official store is bulkpeptidesupply.com. 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 Bulk Peptide Supply
Create a free account to save this vendor, get alerts for new lab tests, and watch price changes.
Bulk Peptide Supply: common questions
Is Bulk Peptide Supply legit?
We rate lab records, not businesses. Mixed lab record: 37 independent tests, 22 of 34 lots filled to label, median purity 99.88%, 3 of 11 products graded D or E. Each result links to its original certificate in the table above.
What do Bulk Peptide Supply reviews say?
We don't hold scored customer reviews for Bulk Peptide Supply yet. The independent lab results on this page are the evidence we have.
Which Bulk Peptide Supply peptides tested best?
We have graded 11 Bulk Peptide Supply products. Semaglutide, Cagrilintide, PT-141, Sermorelin, Melanotan II, Tirzepatide and BPC-157 graded A or B. Ipamorelin, GHK-Cu and TB-500 graded D or E.
Is there a Bulk Peptide Supply coupon code?
We don't have a verified Bulk Peptide Supply coupon code. A discount changes the price, not what is in the vial.
Ordering from Bulk Peptide Supply?
Mixed lab record: 37 independent tests, 22 of 34 lots filled to label, median purity 99.88%, 3 of 11 products graded D or E.
Contact
- US, OK 73120
- bulkpeptidesupply.com