Both are vetted, well-rated picks. The two score 8.5/10 each. Northline Labs is lower on 16 of 25 compounds before codes and 14 after, with one standard amount of every comparable compound costing $1,389.66 against $1,530.56 at NeuroLabs after codes, while NeuroLabs holds one more COA (51 against 50) and scores COA 10/10 against 9/10. Pick Northline Labs for lower unit prices; pick NeuroLabs for the deeper certificate file.
Key takeaways
- Price: Northline Labs is lower on 16 of 25 shared compounds before codes and 14 after; one standard amount of every comparable compound costs $1,389.66 against $1,700.62, or $1,530.56 once NeuroLabs' code is applied.
- COAs: Northline Labs holds 50 COA records and NeuroLabs 51. NeuroLabs scores COA 10/10 against 9/10.
- Reviews: both show 4.3/5 on Trustpilot, Northline Labs from 506 reviews and NeuroLabs from 47.
- Shipping: Northline Labs states FedEx delivery in 2 to 3 days and free shipping from $250; NeuroLabs states free shipping over $200 and UPS standard delivery in 3 to 5 days. Both ship to the United States.
- Codes: NeuroLabs offers PEPTIDEPRICES for 10% off, entered at checkout. Northline Labs has no PeptidePrices code, so its prices are unchanged after codes.
- Pick by priority: Northline Labs for lower unit prices, the wider catalog and the larger review sample; NeuroLabs for the deeper certificate file, the reader code and Apple Pay.
In this article
Both vendors score 8.5/10, for different reasons
| Northline Labs | NeuroLabs | |
|---|---|---|
| PeptidePrices score | 8.5/10 | 8.5/10 |
| Factor scores | COA 9, reputation 9.5, transparency 7, operations 8.5 | COA 10, reputation 8, transparency 8, operations 9 |
| COA status and quality | COA verified, 9/10 | COA verified, 10/10 |
| COA library records | 50 | 51 |
| Listings with an exact issuer-verified certificate | 37 of 60 | 23 of 32 |
| Laboratories on matched certificates | Horizon Analytical (21), ILS Laboratories (16) | Kovera Labs (15), Freedom Diagnostics (8) |
| Catalog | 60 in-stock listings, 37 compounds | 32 in-stock listings, 27 compounds |
| Reader code | No PeptidePrices code | PEPTIDEPRICES (10% off) |
| Ships to | United States | United States; international availability shown at checkout |
| Payment | Credit/debit card | Visa, Mastercard, American Express, Discover, Apple Pay, Bank transfer |
| Location and founding | United States; street address not published; founded 2026 | USA; founding not disclosed |
| Trustpilot | 4.3/5 (506 reviews) | 4.3/5 (47 reviews) |
Prices on 25 shared compounds: Northline Labs is lower on 16
Both catalogs carry 25 of the same in-stock compounds, and all 25 normalize on both sides. The method uses each vendor's cheapest in-stock package, divided by vial milligrams and scaled to the compound's standard research amount. The NeuroLabs after-code column applies PEPTIDEPRICES at 10% off. Northline Labs has no code, so its after-code figure matches its listed price.
| Compound | Northline Labs packages | NeuroLabs packages | Northline Labs per std | NeuroLabs per std | Northline Labs after code | NeuroLabs after code | Lower before code | Lower after code |
|---|---|---|---|---|---|---|---|---|
| GLP-3R | 10mg $71.99; 15mg $89.99; 20mg $116.99; 30mg $170.99; 50mg $269.99 | 5mg $50.79; 10mg $79.05; 20mg $129.89; 40mg $208.99 | $54.00/10mg | $52.25/10mg | $54.00 | $47.02 | NeuroLabs (3% less) | NeuroLabs |
| GLP-2T | 10mg $62.99; 20mg $107.99; 30mg $157.49; 60mg $269.99; 100mg $359.99; 120mg $395.99 | 10mg $79.04; 40mg $192.04 | $33.00/10mg | $48.01/10mg | $33.00 | $43.21 | Northline Labs (31% less) | Northline Labs |
| BPC-157 | 10mg $79.19; 20mg $94.49 | 10mg $52.88 | $47.25/10mg | $52.88/10mg | $47.25 | $47.59 | Northline Labs (11% less) | Northline Labs |
| CJC-1295 (With DAC) | 5mg $89.99 | 5mg $67.80 | $179.98/10mg | $135.60/10mg | $179.98 | $122.04 | NeuroLabs (25% less) | NeuroLabs |
| Tesamorelin | 10mg $71.99; 20mg $112.49 | 10mg $107.35 | $56.24/10mg | $107.35/10mg | $56.24 | $96.62 | Northline Labs (48% less) | Northline Labs |
| GHK-Cu (Copper Peptide) | 100mg $89.99 | 50mg $45.14; 100mg $50.79 | $9.00/10mg | $5.08/10mg | $9.00 | $4.57 | NeuroLabs (44% less) | NeuroLabs |
| Epithalon (Epitalon) | 100mg $79.19 | 10mg $63.35 | $7.92/10mg | $63.35/10mg | $7.92 | $57.02 | Northline Labs (87% less) | Northline Labs |
| SS-31 (Elamipretide) | 10mg $53.99; 50mg $143.99 | 10mg $67.12 | $28.80/10mg | $67.12/10mg | $28.80 | $60.41 | Northline Labs (57% less) | Northline Labs |
| Selank | 10mg $80.99 | 10mg $52.21 | $80.99/10mg | $52.21/10mg | $80.99 | $46.99 | NeuroLabs (36% less) | NeuroLabs |
| TB-500 | 10mg $89.99 | 10mg $54.17 | $89.99/10mg | $54.17/10mg | $89.99 | $48.75 | NeuroLabs (40% less) | NeuroLabs |
| Ipamorelin | 10mg $67.49 | 10mg $73.45 | $67.49/10mg | $73.45/10mg | $67.49 | $66.11 | Northline Labs (8% less) | NeuroLabs |
| 5-Amino-1MQ | 5mg $89.99; 50mg $179.99 | 5mg $40.61 | $36.00/10mg | $81.22/10mg | $36.00 | $73.10 | Northline Labs (56% less) | Northline Labs |
Before codes, Northline Labs is lower on 16 of the 25 and NeuroLabs on 9. After codes the split narrows to Northline Labs 14 and NeuroLabs 11. One standard amount of every comparable compound costs $1,389.66 at Northline Labs and $1,700.62 at NeuroLabs before codes, or $1,389.66 and $1,530.56 after them.
Vial size drives some of the gap. Northline Labs sells Epithalon in a 100mg vial at $79.19; NeuroLabs sells a 10mg vial at $63.35. Per standard amount that is $7.92 against $63.35 before codes.
The rest is spread across the catalog. Northline Labs is 57% lower on SS-31, 56% lower on 5-Amino-1MQ and 48% lower on Tesamorelin. NeuroLabs is 44% lower on GHK-Cu, 40% lower on TB-500, 36% lower on Selank and 25% lower on CJC-1295 (With DAC). The code flips Ipamorelin, where Northline Labs is 8% lower before the code and NeuroLabs is lower after it. It leaves BPC-157 close: $47.25 at Northline Labs against $47.59 at NeuroLabs.
On the GLP labels, Northline Labs is 31% lower on GLP-2T, NeuroLabs is 3% lower on GLP-3R, and GLP-1S appears only at Northline Labs.
COAs and testing: NeuroLabs has the deeper file set
The overall scores tie, but the testing evidence does not. Northline Labs earns COA 9/10; NeuroLabs earns 10/10. The difference is depth of retained material and how cleanly the archive resolves. The scoring rubric is published in the methodology.
Northline Labs: 49 verified reports and one open CJC question
PeptidePrices retained all 50 Northline Labs reports across 81 PDFs and 131 pages. Forty-nine match official laboratory records: 31 Horizon and 18 ILS. The ILS records use different endotoxin-method wording in the saved PDFs and the current portal; PeptidePrices records that as an informational note, not a verification failure.
One CJC report remains under review. The retained file identifies CJC-1295 plus Ipamorelin, with 2.58mg and 2.68mg components, while the official PDF identifies CJC-1295 alone. That report cannot support product badges. Two Horizon reports also show material overfill against their labeled strength: Oxytocin labeled 5mg measured 9.96mg, and Sermorelin labeled 5mg measured 5.8mg.
On live listings, 37 of 60 carry an exact issuer-verified certificate, with Horizon Analytical on 21 and ILS Laboratories on 16. The newest matched analysis date is August 11, 2026.
NeuroLabs: 49 issuer matches and four files per Kovera set
The NeuroLabs library holds 51 issued reports: 29 Freedom Diagnostics reports and 22 Kovera report sets. Forty-nine match exact issuer records. Two source versions print conflicting certification dates and stay outside verified counts and listing controls. Every Kovera set keeps four public files: the primary COA, quantitative endotoxin, ICP-MS elemental impurities and a two-day rapid culture screen. PeptidePrices inspected 88 complete official pages and all 24 current vendor PDF pages.
Published measurements are specific. Kovera BPC-157 10mg measured 99.634% purity and 11.86mg. GLP-3R 20mg measured 99.498% and 20.44mg. Endotoxin panels report measured EU/mL results and controls. Elemental panels retain arsenic, cadmium, lead and mercury values with limits. Rapid culture reports specify two-day incubation at 30–35°C. The NAD+ 1000mg and GLP-2T 10mg vendor reports print August 30 certification dates where the official versions print September 1. Both versions remain accessible, and those listing controls stay withheld.
On live listings, 23 of 32 carry an exact issuer-verified certificate: Kovera Labs on 15 and Freedom Diagnostics on 8. The newest matched analysis date is July 18, 2026.
The caveats are specific. PCR microbial screening is not a sterility test. The older Freedom registry-only IGF-1 LR3 sample measured 95.82% purity, separate from a later Kovera 1mg report at 99.614% purity and 1.08mg. Northline Labs carries its own limits: the CJC discrepancy and the two measured overfills keep its COA factor at 9. Both archives are indexed in the COA library.
Codes: only NeuroLabs has a PeptidePrices code
NeuroLabs offers code PEPTIDEPRICES for 10% off. PeptidePrices verified the offer and checked it on October 3, 2026. The code is not auto-applied, so it has to be entered at checkout. Terms and steps are on the NeuroLabs coupon page.
Northline Labs has no PeptidePrices code, and this comparison applies no discount to its prices. That is why its after-code column above is unchanged.
NeuroLabs takes more payment methods and ships more widely
Northline Labs ships to the United States and accepts credit/debit cards. Its published terms state FedEx delivery in 2–3 days, same- or next-business-day dispatch, plain tamper-evident packaging and free shipping from $250. Orders are final after placement, and the FAQ says they cannot be canceled or changed. No street address is published; the contact email is hello@northlinelabs.org.
NeuroLabs ships to the United States and shows international availability at checkout. Payment options are Visa, Mastercard, American Express, Discover, Apple Pay and bank transfer. Published shipping terms differ by page. One current summary states free shipping over $200 and same-day domestic dispatch for eligible orders. The homepage offers free priority shipping above $250, and the formal policy allows one to two business days of processing followed by UPS standard delivery of three to five days or express delivery of one to two days. International eligibility and duties depend on checkout.
Refund terms are narrow. Sales are final, wrong or damaged items must be reported with photos within 48 hours, and approved remedies are generally replacements. The published Houston address is a self-storage facility, and ownership and legal entity are not identified.
Pick Northline Labs for price and catalog, NeuroLabs for documentation and checkout
Both vendors score 8.5/10, but the factor profiles point in different directions. Northline Labs scores COA 9, reputation 9.5, transparency 7 and operations 8.5. NeuroLabs scores COA 10, reputation 8, transparency 8 and operations 9. The tie is real; the reasons are not the same.
- Buying on unit price across a wide catalog: Northline Labs. It is lower on 16 of 25 shared compounds before codes and 14 after, and it stocks 37 compounds against 27 at NeuroLabs. Its catalog includes 12 compounds NeuroLabs does not list: ARA-290 (Cibinetide), CJC-1295 No DAC + Ipamorelin, Dihexa, Hexarelin, Oxytocin, Pinealon, SLU-PP-332, GLP-1S, Sermorelin, Thymosin Alpha-1, VIP (Vasoactive Intestinal Peptide) and Wolverine.
- Buying for the certificate file: NeuroLabs. Its COA quality is 10/10, its library holds 51 records against 50 at Northline Labs, and each Kovera set keeps four files. Matched listings trace to Kovera Labs and Freedom Diagnostics.
- Wanting a reader discount: NeuroLabs. PEPTIDEPRICES takes 10% off, and it is the only code in this pair.
- Paying by Apple Pay or bank transfer, or checking out from outside the United States: NeuroLabs.
- Wanting the larger independent review sample: Northline Labs, at 4.3/5 from 506 reviews against 4.3/5 from 47. The sample is much larger, even though the scores match.
- Sticking to card payment and US delivery: Northline Labs.
Review records need context. Northline Labs' 506-review sample includes recent one-star accounts of carrier-scan delays, unanswered messages and packaging concerns, alongside reports of fast delivery and responsive support. NeuroLabs' 47-review sample shows 81% five-star and 15% one-star ratings. It also includes a September-updated complaint about an August order returned to sender and a disputed refund, plus two August 13 reviews alleging a $50 positive-review incentive that PeptidePrices has not verified. Vendor-hosted review totals are separate from the 47-review exact-domain sample. The owner reports more than 75,000 fulfilled orders, which is operational context rather than an audited total.
Full evidence, strengths and watch-outs: Northline Labs review and NeuroLabs review.
PeptidePrices is independently owned and has affiliate relationships with some vendors. Affiliate status carries no weight in scores, and neither vendor can edit or approve this comparison.
More vendor comparisons
Questions buyers ask about Northline Labs vs NeuroLabs
Is Northline Labs or NeuroLabs cheaper?
Northline Labs is lower on 16 of 25 shared compounds before codes and 14 after. One standard amount of each comparable compound costs $1,389.66 at Northline Labs and $1,530.56 at NeuroLabs after the 10% code.
How do the Northline Labs and NeuroLabs review records compare?
Both showed 4.3/5 when checked on October 3, 2026. Northline Labs' score comes from 506 Trustpilot reviews; NeuroLabs' comes from 47.
Which vendor has better COA documentation?
NeuroLabs on depth: COA quality 10/10, 51 reports and four retained files per Kovera set. Northline Labs is 9/10 with 50 reports, 81 PDFs and 131 pages, plus one CJC formulation discrepancy under review.
Does Northline Labs have a coupon code?
No. Northline Labs has no PeptidePrices code, so the after-code column in the price table matches its listed prices.
What is the NeuroLabs coupon code?
PEPTIDEPRICES for 10% off. PeptidePrices verified the offer and checked it on October 3, 2026. Enter it at checkout; it does not auto-apply.
Do Northline Labs and NeuroLabs ship internationally?
Northline Labs ships to the United States. NeuroLabs ships to the United States and shows international availability at checkout.
Which compounds does each vendor carry alone?
Northline Labs carries 12 that NeuroLabs does not: ARA-290 (Cibinetide), CJC-1295 No DAC + Ipamorelin, Dihexa, Hexarelin, Oxytocin, Pinealon, SLU-PP-332, GLP-1S, Sermorelin, Thymosin Alpha-1, VIP (Vasoactive Intestinal Peptide) and Wolverine. NeuroLabs carries AHK-Cu and KPV alone.