Side-by-side comparison
SS-31
Mitochondrial PeptideSafety 8/10Mitochondrial research
vs
Humanin
Mitochondrial PeptideSafety 6/10Cytoprotective / longevity research
SS-31
Humanin
Cheapest price
$139.00 /50mg
$147.00 /10mg
Vendors stocking
12
3
Safety rating
8/10
6/10
Mol. weight
639.79 g/mol
≈2,687 g/mol
Administration
Subcutaneous injection
Subcutaneous injection
Price Comparison — 2026
SS-31
VendorPrice
Humanin
Vendors Carrying Both
1 vendor stocks both SS-31 and Humanin — convenient if you want to bundle an order.
Safety Notes
SS-31
FDA: FDA-approved (Barth Syndrome)
FDA-approved Sept 2025; 600+ patients in trials; injection site reactions main AE; well-tolerated
Humanin
FDA: Not FDA-approved
Endogenous peptide; cytoprotective; animal studies favorable; no proven harms