What tests do you run on each lot? +
Every new lot runs a 7-point QC panel at an independent third-party US lab: identity by LC-MS, purity by HPLC, quantity (actual mass in the vial versus the label), sterility, bacterial endotoxins by LAL, heavy metals by ICP-MS against USP <233> limits, and a fentanyl screen. The signed certificate for the exact lot you receive is published before you order, and the vendor is separately graded by Finnrick.
Are your products tested? +
Yes. Every new lot runs a 7-point QC panel at an independent third-party US lab: identity by LC-MS, purity by HPLC, quantity (actual mass in the vial versus the label), sterility, bacterial endotoxins by LAL, heavy metals by ICP-MS against USP <233> limits, and a fentanyl screen. The signed certificate for the exact lot you receive is published before you order, and the vendor is separately graded by Finnrick. Previously, The signed COA for the exact lot you receive is published on our lab reports page, and you can check it before you order.
What makes a good research peptide vendor? +
A trustworthy vendor publishes an independent, lot-specific COA for every batch, tests by HPLC and mass spectrometry, prices fairly, ships discreetly with tracking, and stands behind purity. We do all of these and back it with a tested-or-refunded guarantee: if your own test contradicts the published COA for a lot, you get a full refund and keep the vial.
Is Next Level Labs legit? +
Yes, and you can verify it yourself in under a minute. The lot number printed on your vial maps to that exact batch's certificate of analysis, published on our lab reports page. Every batch is independently tested by HPLC and LC-MS and graded by Finnrick, not tested in-house. No unverifiable numbers, no recycled COAs, no photoshopped reports.
How do I know the peptides aren't fake or underdosed? +
The lot-specific COA confirms both identity (mass spec) and purity (HPLC) for the exact batch you receive, so you can see it is the right compound at the labeled quality. If your own independent test contradicts our published COA for that lot, you get a 100% refund and keep the vial.
How does your pricing compare? +
We price research peptides competitively, from $30, with bulk discounts of 5% at five or more vials and 20% at ten or more. Paying by Venmo takes another 3% off and Zelle takes 5% off, and shipping is free over $200.
Are these for human use? +
No. Everything we sell is a research compound for in vitro laboratory use only. Nothing on this site is medical advice, and no statement here has been evaluated by the FDA.
How fast do orders ship? +
Orders paid before 5pm ET on a business day ship the same day, via UPS with tracking; after that, the next business day. Packaging is a plain mailer with no NLL branding. UPS 2-Day Air is a flat $9.99 and free over $200, with Next Day Air available at checkout. Continental US only.
What payment methods do you accept? +
Card, Venmo, Zelle, or bank transfer. Cards go through Stripe with Apple Pay and Google Pay, and confirm instantly. Pay Venmo (@NLL01) and take 3% off, or Zelle (NextLevelLabs) and take 5% off. Every method takes about 30 seconds at checkout.
Can I return a product? +
Unopened vials can be returned within 14 days of delivery for a full refund. Damaged-in-transit vials are replaced free. And if your independent test contradicts our published COA, you get a 100% refund and keep the product.
Do I need bacteriostatic water? +
Lyophilized peptides arrive as dried powder, and laboratories bring them into solution with bacteriostatic water. We stock sterile bacteriostatic water so it can ship in the same order. Handling parameters should follow the recipient laboratory's standard protocols.
