Vendor and compound
SS-31 from Northline Labs
Northline Labs lists SS-31 at $6.00 per mg, 11% over the $5.40 peer median. No third-party certificate for SS-31 from Northline Labs has been located, so nothing here establishes what is in the vial. The cheapest listed price for SS-31 anywhere in the index is $3.00 per mg at Hydro Research Peptides.
All SS-31 vendors · Northline Labs profile · scores 74.4 of 100, rank 21 · 0 certificates for this compound · verified 1 Aug 2026
What it costs
| Vial | Listed price | Per mg | vs peer median | Listing |
|---|---|---|---|---|
| 10 mg | $59.99 | $6.00 | +11% | SS-31 – Premium Research Peptide |
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 SS-31 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 SS-31
| Vendor | Score | Per mg | Certificates for this compound |
|---|---|---|---|
| Ascend Science | 90.1 | $5.25 | 1 |
| Origin Labs | 87.7 | — | 1 |
| Bench Grade Peptides | 86.8 | $8.00 | 1 |
| Polaris Peptides | 86.6 | $5.16 | 1 |
| Hydro Research Peptides | 86.5 | $3.00 | 0 |
| PeptidePlugs | 86.3 | $4.00 | 6 |
| ZC Labs | 83.2 | $3.75 | 1 |
| Koi Peptides | 79.8 | $5.00 | 0 |
Ordered by overall evidence score. See every vendor listing SS-31.
Questions
Is SS-31 from Northline Labs third-party tested?
Not so far as this index can establish. No third-party certificate for SS-31 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 SS-31 cost at Northline Labs?
$6.00 per milligram, from 10 mg at $59.99. The peer median across every vendor we price for SS-31 is $5.40 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 SS-31?
Northline Labs scores 74.4 of 100 on the published rubric and ranks 21 overall, computed from its documentation rather than from opinion. For SS-31 specifically no certificate is on file, which is the gap to weigh. Hydro Research Peptides lists it cheaper at $3.00 per mg.