Also sold as MTP-31, MDS-31, S-31-S, PUR-31, FPC-31 Closeout, RR-31, MTS-31, FPC-31, SS-31, US fill/finish
For 100mg of SS-31, the lowest total is Glacier Aminos at $159.96 ($1.60 per mg, as 10 × 10mg), including its buy 1 get 1 free sale, code PLUG (10% off) and free shipping. Next: Peptide Supply Co at $169.50, then PeptidePlugs at $173. We track 11 vendors carrying it.
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| Vendor | 10mg | 100mg | Per mg | Codes applied | Testing |
|---|---|---|---|---|---|
| Glacier Aminosprofile | $50.98 | $159.96 | $1.60 | PLUG 10% |
Purity, Endotoxin, Metals |
| Peptide Supply Coprofile | $43.50 | $169.50 | $1.70 | PLUG 10% |
Purity, Endotoxin* |
| PeptidePlugsprofile | $51.50 | $173 | $1.73 | PLUG 10% first order only |
Purity, Endotoxin, Metals* |
| Forge Performanceprofile | $100 | $181 | $1.81 | PLUG 10% |
Purity, Endotoxin, Metals |
| Puratek Peptidesprofile | $74.44 | $202.37 ships 120mg: 4 × 30mg | $1.69 | THEPEPTIDEPLUG 10% |
Purity, Endotoxin, Metals* |
| FirstForm Peptidesprofile | $50.99 | $206.95 | $2.07 | PLUG 10% + B2G1 buy 2 get 1 free |
Purity, Endotoxin, Metals |
| Real Peptidesprofile | $32.99 | $217.31 | $2.17 | — | Purity, Endotoxin* |
| Blank Peptidesprofile | $38 | $220 | $2.20 | BLACKFRIDAY 50% + PLUG 10% |
Purity, Endotoxin |
| Orbitrexprofile | $65.48 | $254.98 | $2.55 | PLUG 15% |
Purity, Endotoxin, Metals* |
| Regenerative Researchprofile | $120.05 | $289.17 ships 132mg: 3 × 44mg | $2.19 | PLUG 15% |
Purity, Endotoxin, Metals* |
| Peptide Partnersprofile | $108.90 | $405 | $4.05 | PLUG 10% |
Purity, Endotoxin, Metals |
Totals come from the same optimizer as our comparison tool: each vendor's cheapest way to supply the amount, with its multi-vial and mix-and-match discounts, the discount codes we hold for that vendor, and shipping to the US. Vendors reach each amount with whatever vial sizes they sell, and a vendor without a matching size may ship slightly more. Codes marked "first order only" assume a first order. "Per mg" is for the 100mg total. Confirm the final price at checkout. *Testing marked with an asterisk is present on some batches, not all.
Buy at Glacier Aminos — code PLUG → See the full breakdown →| Strength | Vendors | Single vial | 10-vial kit | Per mg (kit) |
|---|---|---|---|---|
| 10mg | 8 | $32.99 · Real Peptides | $159.96 · Glacier Aminos | $1.60 |
| 30mg | 1 | $74.44 · Puratek Peptides | $472.18 · Puratek Peptides | $1.57 |
| 44mg | 1 | $120.05 · Regenerative Research | $696.15 · Regenerative Research | $1.58 |
| 50mg | 5 | $100 · Forge Performance | $540 · PeptidePlugs | $1.08 |
| 100mg | 2 | $169.50 · Peptide Supply Co | $918 · PeptidePlugs | $0.918 |
Each strength is priced using only that vial size (single vials or packs of it), the same as choosing that size in the comparison tool. Totals include multi-vial discounts, our discount codes and US shipping.
It depends on how much you buy, because most vendors discount multi-vial orders. For 10mg, Real Peptides is lowest at $32.99 total. For 100mg, Glacier Aminos is lowest at $159.96 total ($1.60 per mg), including its buy 1 get 1 free sale, code PLUG (10% off) and free shipping.
For 100mg, the lowest total overall — Glacier Aminos at $159.96 — is also from a vendor that publishes endotoxin testing on every batch. 9 of the 11 vendors do.
SS-31 is sold in 10mg, 30mg, 44mg, 50mg and 100mg vials. 10mg × 10: Glacier Aminos at $159.96 ($1.60 per mg); 30mg × 10: Puratek Peptides at $472.18 ($1.57 per mg); 44mg × 10: Regenerative Research at $696.15 ($1.58 per mg); 50mg × 10: PeptidePlugs at $540 ($1.08 per mg); 100mg × 10: PeptidePlugs at $918 ($0.918 per mg).
Glacier Aminos, Forge Performance, FirstForm Peptides and Peptide Partners publish heavy-metals testing on every batch. PeptidePlugs, Puratek Peptides, Orbitrex and Regenerative Research publish it on some batches.
For 100mg, totals run from $159.96 to $405 across 11 vendors — $1.60 to $4.05 per mg — including each vendor's multi-vial discounts, our discount codes and shipping. Before any discounts, list prices run from $1.02 to $7.00 per mg.