FOXO4-DRI vs SS-31
Which should you choose? Here's what you need to know.
The short answer
FOXO4-DRI and SS-31 are both metabolic / longevity peptides, but they work differently. A D-retro-inverso peptide that disrupts the FOXO4-p53 interaction in senescent cells. Studied as a potential senolytic agent for clearing aged cells. A mitochondria-targeted peptide (also known as Elamipretide) that stabilizes cardiolipin in the inner mitochondrial membrane. Studied for mitochondrial dysfunction. Compare vendor pricing and availability below.
FOXO4-DRI
Metabolic / LongevityA D-retro-inverso peptide that disrupts the FOXO4-p53 interaction in senescent cells. Studied as a potential senolytic agent for clearing aged cells.
SS-31
Metabolic / LongevityA mitochondria-targeted peptide (also known as Elamipretide) that stabilizes cardiolipin in the inner mitochondrial membrane. Studied for mitochondrial dysfunction.
Price & availability
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options.
FOXO4-DRI
SS-31
$99.99
Starting from
$32.00
$25.00
Avg. price per mg
$6.42
16
Vendors selling it
34
15 options
In stock now
36 options
9.0/10
Top trust score
9.1/10
0
Purity tests on file
0
Ready to buy?
Our top-rated vendor for each, based on trust scores, purity testing, and price.
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Best FOXO4-DRI Vendor
6.7/10
$255.00(15mg)
Best SS-31 Vendor
8.7/10
$120.00(50mg)
Where does this data come from?
We check vendor prices every day and pull in real purity test results from independent labs — not vendor claims. No vendor can pay to rank higher. See our full methodology.