Start with the lot. Open the published certificate, check the laboratory and compare the lot with your order. Our testing page explains the QC process.
Checking another supplier? Use our five checks for verifying a peptide vendor. The same questions apply to NLL.
A question about your report? Send the compound and lot number to support@nextlevel-labs.com.
If you searched that question, you are doing the right thing. Here is the answer, and then the procedure for confirming it without taking our word for any of it.
Direct answer: Next Level Labs publishes a lot-matched certificate of analysis for every compound it sells, tested by five independent laboratories and readable before you order. You can verify that yourself in about two minutes using the lot number on the vial. The procedure is below.
Which Next Level Labs is this?
Next Level Labs (NLL) is the research-peptide storefront operated by Next Level Labs NY LLC at nextlevel-labs.com. We operate from New York and supply compounds for in vitro laboratory research only. Our customer-support address is support@nextlevel-labs.com.
Our lab reports can be viewed without creating a customer account. Match the domain and lot number when checking a directory listing or certificate.
Next Level Labs at a glance
- Company
- Next Level Labs NY LLC, operating as Next Level Labs (NLL).
- Official website
- nextlevel-labs.com
- What we supply
- Research peptides, blends and laboratory supplies for in vitro research. Not for human or veterinary use.
- Before you buy
- Compare sizes and prices and read the published laboratory reports. No account needed to browse.
- Shipping
- US shipping via UPS. Standard 2-Day Air is $9.99, free on qualifying orders of $200 or more. Dispatch times and options.
- Returns
- Unopened, factory-sealed vials: 14 days from delivery. Customer pays return shipping. Full return terms.
- Support
- support@nextlevel-labs.com
Where can I find independent reviews of Next Level Labs?
This is a company-published verification guide from Next Level Labs. Independent reviews should identify the seller and describe the reviewer's own experience. When checking reviews elsewhere, confirm that the website named is nextlevel-labs.com. A similar business name alone is not enough to match a review, certificate or complaint to your order.
A laboratory report describes the sample tested. It is separate from a customer review of delivery or support. Our shipping policy and refund terms describe what we offer.
Verify it in two minutes
Do not take the sentence above on trust. Run it.
- Find the lot number printed on the vial, or on the product page before you buy.
- Open the lab reports library.
- Find that exact lot. The report names the laboratory that ran it, the assays performed, and the result for that batch.
- If the lot on the glass is not published there, do not use it, and email support@nextlevel-labs.com.
That last step is the part worth reading twice. A verification procedure a vendor cannot fail is not a verification procedure.
Every published lot
Eighteen lots, five independent laboratories, purity as tested. Not a selection.
| Compound | Lot | HPLC purity | Laboratory |
|---|---|---|---|
| Wolverine Stack (BPC-157 + TB-500) | PS07-BCTB20 | 99.94% | ILS Laboratories |
| GLOW | 081026 | 99.96% | Bioviridian |
| KLOW Blend | 080426 | 99.93% | Freedom Diagnostics |
| SS-31 | 082526 | 99.80% | Freedom Diagnostics |
| MOTS-C | PS07-MS40 | 99.79% | ILS Laboratories |
| Kisspeptin-10 | ki5674554 | 99.78% | MDx BioAnalytical |
| CJC-1295 with DAC | cjwd09080 | 99.76% | MDx BioAnalytical |
| Glutathione | gtt154356 | 99.73% | MDx BioAnalytical |
| GLP-2 TZ (Tirzepatide) | PS07-T210 | 99.72% | ILS Laboratories |
| Retatrutide 10mg | PS07-R310 | 99.52% | ILS Laboratories |
| CJC-1295 + Ipamorelin | PS07-CJIP10 | 99.46% | ILS Laboratories |
| NAD+ | PS07-NAD500 | 99.45% | ILS Laboratories |
| KPV | PS07-KPV10 | 99.44% | ILS Laboratories |
| Epithalon | 062226 | 99.42% | Freedom Diagnostics |
| GHK-Cu | PS07-GHK100 | 99.34% | ILS Laboratories |
| Retatrutide 20mg | PS07-R320 | 99.20% | ILS Laboratories |
| Tesamorelin | PS07-TSM10 | 98.04% | ILS Laboratories |
| Bacteriostatic Water 30mL | EB61901 | n/a | Chromate |
Tesamorelin lot PS07-TSM10 tested at 98.04%. It is the lowest number in the table and the only one under 99%, and it is published at the figure it earned. The seventeen results above it are worth more because that one is there.
What gets tested
Purity is one assay out of several, and a vendor quoting only purity is quoting the easy one. Each peptide lot runs a seven-point panel.
- Identity by mass spectrometry, confirming the compound is the one on the label.
- Purity by HPLC, the percentage figure in the table above.
- Quantity, confirming the vial contains the stated amount.
- Sterility, testing whether anything is growing in the vial.
- Endotoxins by LAL assay, reported in EU/mL.
- Heavy metals by ICP-MS, against USP General Chapter <233> limits.
- Fentanyl screen, because contamination in this supply chain is a real risk and screening for it is cheap.
Bacteriostatic water is tested against a different panel, because a solvent and a lyophilized peptide are not the same product. Lot EB61901 was checked for identity by RP-HPLC, sterility under USP General Chapter <1223>, endotoxins by LAL, pH and benzyl alcohol conformance to the 0.9% specification. It carries no HPLC purity figure, which is why the table above shows none.
The laboratories
Five named laboratories appear across the catalog: ILS Laboratories, MDx BioAnalytical, Freedom Diagnostics, Chromate and Bioviridian. Every report says which one ran it. A report that will not name its laboratory leaves nobody standing behind the result, which is why the name is on ours.
Is Next Level Labs graded by Finnrick?
Finnrick grades peptide suppliers by buying samples blind and testing them by HPLC, then scoring the vendor. Next Level Labs does not yet have its own vendor page on Finnrick. What Next Level Labs publishes instead is specific to your purchase: every lot is tested by an independent laboratory and the signed certificate of analysis is published on the lab reports page before you order, matched to the lot number printed on the vial. Finnrick itself, and what its vendor ratings do and do not cover, is explained in Finnrick grading explained.
The tested-or-refunded guarantee
If you independently test a vial and the result does not match our published COA for that batch, we will issue a full refund and you keep the product. No return required.
Email support@nextlevel-labs.com with your order number and the independent test report. See the refund policy for the guarantee, unopened-vial returns and damage-in-transit replacement.
How orders actually work
- Orders paid before 5pm ET on a business day ship the same day. After that, the next business day.
- Shipped from the United States via UPS with tracking, in plain unbranded packaging. Continental US only.
- UPS 2-Day Air is a flat $9.99 and free over $200. Next Day Air is available at checkout.
- Prices are on the product pages. No membership, no subscription requirement.
- There is no walk-in location. Orders are placed on the site.
What we sell, and what we do not claim
Everything in the catalog is a research compound for in vitro laboratory use only. Not for human or veterinary use. We do not publish dosing protocols, we do not describe outcomes, and nothing on this site has been evaluated by the FDA. A vendor offering you a dosing chart alongside a research-use label is contradicting itself in public, and that contradiction is worth noticing wherever you shop.
The fastest way to answer the question in the title is to go read a report we did not choose for you.
See all 18 lab reports.Frequently asked questions
Is Next Level Labs legit?
Next Level Labs publishes a lot-matched certificate of analysis for every compound it sells, tested by five independent laboratories and readable before you order. You can verify this by matching the lot number printed on your vial to the report in the lab reports library. If a lot on the glass is not published there, do not use it.
How do I verify a Next Level Labs order?
Find the lot number printed on the vial, open the lab reports library, and locate that exact lot. The report names the testing laboratory, the assays performed and the result for that batch. If the lot is not published, email support@nextlevel-labs.com.
Which labs test Next Level Labs peptides?
Five independent laboratories appear across the catalog: ILS Laboratories, MDx BioAnalytical, Freedom Diagnostics, Chromate and Bioviridian. Every published report names the laboratory that ran it.
What testing does each lot go through?
Each peptide lot runs a seven-point panel: identity by mass spectrometry, purity by HPLC, quantity, sterility, endotoxins by LAL assay, heavy metals by ICP-MS against USP General Chapter 233 limits, and a fentanyl screen. Bacteriostatic water runs a different panel covering identity, sterility, endotoxins, pH and benzyl alcohol conformance, and carries no HPLC purity figure.
Does Next Level Labs publish its lowest test results?
Yes. All eighteen published lots appear with the figure they tested at, including Tesamorelin lot PS07-TSM10 at 98.04%, which is the lowest result in the catalog and the only one below 99%.
Where does Next Level Labs ship from?
Orders ship from the United States via UPS with tracking, in plain unbranded packaging. Orders paid before 5pm ET on a business day dispatch the same day. Continental US only. UPS 2-Day Air is a flat $9.99 and free over $200.
Are Next Level Labs products for human use?
No. Everything sold is a research compound for in vitro laboratory use only, not for human or veterinary use. No dosing protocols are published and no statement has been evaluated by the FDA.
Is Next Level Labs graded by Finnrick?
Finnrick grades peptide suppliers by buying samples blind and testing them by HPLC, then scoring the vendor. Next Level Labs does not yet have its own vendor page on Finnrick. What Next Level Labs publishes instead is specific to your purchase: every lot is tested by an independent laboratory and the signed certificate of analysis is published on the lab reports page before you order, matched to the lot number printed on the vial.
Related reading
Best peptide companies 2026: a verification scorecard applies these checks to nine vendors on one date, and How to get peptides tested covers commissioning your own report. The general procedure, applicable to any vendor and not just this one, is in How to verify a peptide vendor. Reading a report line by line is covered in How to read a peptide COA. Shipping, returns and sourcing questions are on the FAQ.
For in vitro research use only. Not for human consumption. Not evaluated by the FDA. Not intended to diagnose, treat, cure, or prevent any condition. This page describes sourcing and documentation practices and is not medical advice.