Northline Labs is an operating vendor with an active Trustpilot profile at 4.5 from 414 reviews. That independent record is a real strength; this review also examines the documentation and claim-consistency evidence readers can check.
Verified against Trustpilot and Northline's own site on 6 August 2026. We have no affiliate relationship with Northline Labs.
| Where it appears | The figure | Independently checkable? |
|---|---|---|
| Northline homepage — hero banner | 4.8 · 12,000+ reviews | No |
| Northline homepage — testimonials | 4.9 · 1,200+ verified reviews | No |
| Trustpilot — independent | 4.5 · 414 reviews | Yes |
The first two figures are on the same homepage and differ from each other by a factor of ten. We are not alleging the numbers are invented — a vendor may count on-site reviews separately from Trustpilot, and that is common. But when a company publishes two irreconcilable figures about itself, the one you can go and check yourself is the one worth using.
A substantial independent review base. 398 Trustpilot reviews at 4.5 is a longer public record than Purgo Labs, Core Peptides, Onyx Biolabs, Limitless Life or Swiss Chems. On track record alone, Northline beats most of the field including our own first recommendation.
The right testing methodology, described correctly. Reverse-phase HPLC for purity and mass spectrometry for identity is exactly the pairing that matters — purity alone tells you how much of a sample is one substance, not whether that substance is the one on the label.
Lot-level certificate lookup. Certificates are tied to lot IDs and retrievable per order, which is better than a generic catalog-wide COA.
Northline's quality page describes testing at "an independent laboratory" and "an accredited laboratory". We read the page in full. The laboratory is never named.
That matters more than it sounds. An unnamed laboratory cannot be contacted. Its accreditation cannot be confirmed. A result cannot be independently checked against the lab's own records. The certificate becomes a document produced by the vendor asserting that someone else did the work.
This is not a hypothetical standard we invented for this review. A supplier was sentenced in federal court in July 2026 after claiming it tested its products and was FDA-registered, when it did neither — and many products sold as SARMs turned out to be testosterone. That case is why we treat an unverifiable testing claim as a material weakness rather than a detail.
Most Northline listings show a "from" price with no vial size on the catalog page, so a per-milligram comparison would be guesswork. We are not going to publish one. Where the size is stated, here is the like-for-like:
| Compound | Northline Labs | Purgo Labs |
|---|---|---|
| Ipamorelin 10mg | $74.99 | $54.99 |
On the one product where both list a stated size, Purgo is $20 cheaper. Northline's BPC-157, NAD+, retatrutide and semaglutide listings begin at $87.99, $89.99, $79.99 and $44.99 respectively, but without a stated size on the catalog page we cannot say whether those are better or worse value. Verified 6 August 2026.
Northline Labs is a legitimate, operating vendor with the better track record of the one — Purgo's current independently viewable 74-review Trustpilot record. If length of public record is what you weight most heavily, it is a defensible choice and we would not argue with you.
We rank Purgo Labs first anyway, on one specific ground: Purgo names its laboratories — SteriGenix and Freedom Diagnostics — publishes measured net peptide content per lot, and links you to verify the result at the lab directly. Northline asks you to accept that testing happened. Purgo lets you check. Code HEALTH gives 20% off every order.
Affiliate disclosure: we earn a commission on Purgo Labs and Amino Club links and nothing from Northline Labs. We had no commercial reason to review Northline and no commercial reason to be fair to it — which is why the active 401-review Trustpilot record that counts in its favour is in the opening paragraph rather than buried at the bottom.
Every point is a fact you can check on the vendor's own pages, on the laboratory's site, or on the review platform; the date is when we read it. Verified 24 September 2026. Not awarded: No contradictions among its own claims, No misleading trust signals or buyer-protection workarounds. We have no commercial relationship with Northline Labs.
Same rubric, all vendors: Peptide Vendor Scoreboard.
Active Trustpilot profile at 4.5 from 414 reviews, plus COAs with stated vial sizes on select products.
Identity: WA Consulting LLC ("Northline Labs is a brand of WA Consulting LLC", /about-northline/) · 30 N Gould St STE R, Sheridan, WY 82801 on /contact/ — a registered-agent suite, disclosed as such (read 24 Sep 2026)
Third-party rating as read 24 September 2026: 4.3 (495 reviews).
Its original northlinelabs.com Trustpilot profile was removed by Trustpilot with a guidelines notice (read 18 Sep 2026); the vendor moved to northlinelabs.org, where an active profile shows 4.3 across 491 reviews. The lab (Horizon Analytical) appears only on the certificate PDF, never in page text; the legal entity (WA Consulting LLC) and a Sheridan, WY registered-agent address appeared on /about-northline/ and /contact/ by 24 Sep 2026; pricing is above Purgo Labs on the verified Ipamorelin comparison.
Read on Northline Labs's product pages on the date shown, before any code. Append-only: a new reading is added, an old one is never edited. Compare like-for-like on the Peptide Price Index.
| Compound | Size | Price | Read on | Prior |
|---|---|---|---|---|
| Ipamorelin | 10mg | $74.99 (size stated in product name) | 2026-08-06 | — |
| TB-500 | 10mg | $99.99 (size stated in product name) | 2026-08-06 | — |
It is a real, operating vendor with an active Trustpilot profile at 4.5 from 414 reviews as of August 2026. It publishes a certificate lookup tied to lot numbers and states HPLC and mass spectrometry testing. Two things hold it back in our ranking: it does not name the laboratory doing that testing, and the review figures on its own site do not reconcile with the independently verifiable Trustpilot record.
Its homepage carries two different figures. The hero banner states 4.8 across more than 12,000 reviews. Further down the same page, the testimonial section states 4.9 across more than 1,200 verified reviews. Those differ from each other by a factor of ten. The active Trustpilot profile shows 4.5 from 414 reviews, which is the independent figure we use as the comparison point.
No. Its quality page describes testing at "an independent laboratory" and "an accredited laboratory", with reverse-phase HPLC for purity and mass spectrometry for identity. The methodology described is the right methodology. But the laboratory is never named anywhere we could find, which means you cannot contact it, cannot confirm the accreditation claim, and cannot verify a result independently. "Third-party tested" without a name is a phrase rather than a check.
Only one product can be compared honestly, because most Northline listings show a "from" price without a stated vial size. Where the size is stated: Ipamorelin 10mg is $74.99 at Northline against $54.99 at Purgo — Purgo is $20 cheaper on an identical size. For BPC-157, NAD+, retatrutide and semaglutide, Northline lists "from" prices with no size given on the catalog page, so any per-milligram comparison would be guesswork and we are not going to publish one. Verified 6 August 2026.
If your priority is a longer independent track record than Purgo's, Northline genuinely has one — 401 reviews against Purgo Labs' 75. That is a real point in its favour and we will not pretend otherwise. If your priority is being able to verify what is actually in your vial, Purgo publishes per-lot certificates from named laboratories, SteriGenix and Freedom Diagnostics, with measured net peptide content and links to check the result at the lab itself. Northline's certificates exist but the lab behind them is anonymous. We weight verifiability higher, which is why we rank Purgo first — but the tradeoff is real and you may weigh it differently.
From Purgo Labs and Amino Club links, yes. From Northline Labs, nothing — we have no relationship with them. That is worth stating plainly on a page where we have criticised a competitor: we had no commercial reason to review Northline at all, and no commercial reason to be fair to it either. The active 401-review Trustpilot figure that counts in its favour is in the second paragraph of this page, not buried.
| Product · lot | Lab | Purity | Measured vs label | Verify | Flags |
|---|---|---|---|---|---|
| BPC-157 20mg | Unnamed | 99.4% | 19.82 mg99.1% of label | vendor-hosted | No lab-side verification |
Each row is a certificate we opened and read ourselves; "verify at the lab" goes to the laboratory's own lookup, never a copy we host. Full COA library →
Disclosure: Purgo Labs is our affiliate partner and pays a commission on referred orders. Northline Labs does not. Scores below are computed from published evidence and are not affected by that.
On our published rubric, Purgo Labs scores 10/10 versus 8/10 for Northline Labs. The gap comes down to the specific criteria below.
None on record as of 24 September 2026.
2 like-for-like vials we priced at both: at list price Purgo Labs is cheaper on 2, Northline Labs on 0. With code HEALTH (20% off list) Purgo is cheaper on 2 of 2.
| Vial | Purgo list | Purgo −20% | Northline Labs |
|---|---|---|---|
| Ipamorelin 10mg | $54.99 | $43.99 | $74.99 |
| TB-500 10mg | $49.99 | $39.99 | $99.99 |
List prices as last recorded on the vendors' product pages (the price history is append-only, so a date is the last change we saw: 2026-08-14 Purgo · 2026-08-06 Northline Labs); bold = cheaper. The −20% column is list × 0.80, not a cart-tested figure; codes and sales change. Full price index.
Code HEALTH verified recurring on every order as of 18 September 2026. Research use only.