NextGenPeps and Blank Peptides are close on our transparency method (8.0 vs 7.8), for different reasons. Blank Peptides has the tighter paperwork: every certificate is tied to a lot number printed on the vial, and each current lot has a separate endotoxin report. NextGenPeps is the more open business, with a published LLC and street address, and it's cheaper. Neither has independent Finnrick data. NextGenPeps is #2 and Blank Peptides #4 in our editors' order.
Notice: Research peptides are sold for in-vitro laboratory research only. They are not FDA-approved, not for human or animal consumption, and this page is not medical advice. This comparison covers supplier transparency only, based on public documentation. We didn't purchase or test products.
Side-by-side
| Blank Peptides | NextGenPeps | |
|---|---|---|
| Transparency score (method) | 7.8 | 8.0 |
| Overall score | 7.8 | 8.8 |
| Entity and address | No entity; Sheridan, WY mailing address | NUTRL LLC, San Diego, CA street address |
| Domain / founding | Domain March 2026 (site claims 2021) | Founded 2025 |
| Labs | Horizon Analytical, Freedom Diagnostics | Janoshik, BioRegen |
| Where the lab is named | Site and every certificate | Each COA library entry |
| Lot on certificate | Yes, and on the vial with a lookup page | Not shown in the library |
| Endotoxin | Separate report per current lot | On some batches |
| Finnrick | No profile | No profile |
| GLP-class naming | Real names (retatrutide, tirzepatide) | Codes (GLP-RT, GLP-TZ, GLP-S) |
| Ships from | Texas; international available | California; US only |
| Free shipping | Over $200 | Over $150 |
| Payment | Cards, wire, crypto | Cards, PayPal, Apple Pay |
| Coupon code | CHECKED, 10% off | None (10% sign-up offer) |
COAs: Blank matches the report to your vial
Both vendors name their labs, which is the first thing to check. The difference is how easily you can tie a report to the vial in your hand.
Blank Peptides prints a lot number and QR code on every vial. Its COA library lists 232 certificates by lot, and the verify page returns the purity and endotoxin reports for a lot you type in. The BPC-157 report we opened showed 99.4% purity and 9.82 mg measured in a 10 mg vial, with an endotoxin result under 0.05 EU/mL (review).
NextGenPeps posts about 49 dated entries, each with a purity result and some with endotoxin, but the library doesn't show lot numbers or verification keys. Its Janoshik reports can be checked on Janoshik's own site with the task number and key (review).
Blank has some paperwork gaps: it claims sterility testing we couldn't find, and two CJC-1295 products share a lot number.
Business transparency: NextGenPeps is clearer
NextGenPeps publishes NUTRL LLC and a San Diego street address in its terms. Blank Peptides publishes a Wyoming mailing address and no entity, and its "since 2021" claim doesn't match a domain registered in March 2026. This is the main reason NextGenPeps scores higher.
Labeling
Both use strict research-use language. Blank sells GLP-class compounds under their real names and says it gives no dosing guidance. NextGenPeps sells three GLP-class products under codes (GLP-RT, GLP-TZ, GLP-S), which we treat as a labeling concern. Blank's weak point is a "Sexual Health" category.
Price check
| Item | Blank Peptides (Oct 12, 2026) | NextGenPeps (Oct 7, 2026) |
|---|---|---|
| BPC-157 | $65.00 (10 mg) | $37.00 (5 mg) |
| Retatrutide 10 mg | $115.00 | $71.00 (as GLP-RT) |
Per mg, BPC-157 is about $6.50 at Blank and $7.40 at NextGenPeps, but NextGenPeps is clearly cheaper on retatrutide. Blank's CHECKED code and 3+/9+ bulk pricing lower its per-vial cost on larger orders.
Which should you choose?
- Choose Blank Peptides if matching a certificate to your exact lot, with an endotoxin result, matters most, or you need international shipping. Code CHECKED gives 10% off. Visit Blank Peptides.
- Choose NextGenPeps for a published entity and address, Janoshik-verifiable reports and lower prices. Visit NextGenPeps.