Vendor and compound
L-Carnitine from Northline Labs
Northline Labs lists L-Carnitine at $0.100 per mg, 11% over the $0.090 peer median. No third-party certificate for L-Carnitine from Northline Labs has been located, so nothing here establishes what is in the vial. The cheapest listed price for L-Carnitine anywhere in the index is $0.030 per mg at PeptidePlugs.
All L-Carnitine vendors · Northline Labs profile · scores 68 of 100, rank 21 · 0 certificates for this compound · verified 5 Oct 2026
What it costs
| Vial | Listed price | Per mg | vs peer median | Listing |
|---|---|---|---|---|
| 600 mg | $59.99 | $0.100 | +11% | L-Carnitine – Premium Research Compound |
Read from the vendor’s own store and normalised per milligram, because a smaller vial at a lower sticker price is usually the dearer peptide.
What the laboratory found
No third-party certificate for L-Carnitine from Northline Labs has been located.
That is a statement about the public record, not an accusation. The vendor may test and not publish, or publish somewhere we have not read. What it means for a buyer is that the price above is the only thing established here, and price says nothing about what is in the vial.
Vendors whose certificates you can check yourself lists the ones where that gap is closed.
Other vendors selling L-Carnitine
| Vendor | Score | Per mg | Certificates for this compound |
|---|---|---|---|
| PeptidePlugs | 82.6 | $0.030 | 1 |
| Modern Aminos | 79.7 | $0.090 | 0 |
| NeuroLabs Research | 74.6 | $0.100 | 0 |
| Eternal Peptides | 66 | $0.090 | 0 |
Ordered by overall evidence score. See every vendor listing L-Carnitine.
Questions
Is L-Carnitine from Northline Labs third-party tested?
Not so far as this index can establish. No third-party certificate for L-Carnitine from Northline Labs has been located. The vendor may test and not publish; what can be said is that nothing public establishes the contents of a vial.
How much does L-Carnitine cost at Northline Labs?
$0.100 per milligram, from 600 mg at $59.99. The peer median across every vendor we price for L-Carnitine is $0.090 per mg, so this is +11% against the market. Prices are normalised per milligram so vials of different sizes compare fairly.
Is Northline Labs a good place to buy L-Carnitine?
Northline Labs scores 68 of 100 on the published rubric and ranks 21 overall, computed from its documentation rather than from opinion. For L-Carnitine specifically no certificate is on file, which is the gap to weigh. PeptidePlugs lists it cheaper at $0.030 per mg.