MOTS-c vs SS-31
Which should you choose? Here's what you need to know.
The short answer
Both target mitochondrial health but from different angles. MOTS-c is a natural signaling peptide that acts as a metabolic regulator (like an exercise mimetic). SS-31 physically stabilizes the inner mitochondrial membrane to protect energy production.
On 8 Oct 2026 Peptide Compare tracked 61 vendors selling MOTS-c, cheapest in stock $1.73 per mg at Modern Research, and 29 selling SS-31, cheapest $2.30 per mg at Nextech Labs.
MOTS-c
Metabolic / LongevityMOTS-c is a 16-amino-acid peptide naturally encoded by mitochondrial DNA. It's studied as a metabolic regulator that improves insulin sensitivity and enhances glucose utilization. It's been called an "exercise mimetic" for its ability to activate metabolic stress-response pathways.
Choose MOTS-c if:
You're interested in broad metabolic optimization — insulin sensitivity, exercise performance, and metabolic stress resistance.
SS-31
Metabolic / LongevitySS-31 (elamipretide) is a synthetic tetrapeptide designed to stabilize the inner mitochondrial membrane. By protecting this structure, it supports energy production efficiency and reduces oxidative damage. It's been in clinical trials for heart failure, kidney injury, and age-related macular degeneration.
Choose SS-31 if:
You want to directly protect mitochondrial structure and energy production, especially if you're focused on age-related cellular energy decline.
Using both together
MOTS-c and SS-31 work through complementary mechanisms — MOTS-c as a metabolic signaling molecule and SS-31 as a direct membrane stabilizer. Some longevity researchers explore them together as a mitochondrial health stack.
Price & availability
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options. Prices verified Oct 8, 2026.
MOTS-c
SS-31
$29.34
Starting from
$35.00
$5.53
Avg. price per mg
$6.24
61
Vendors selling it
29
84 options
In stock now
36 options
9.0/10
Top trust score
9.1/10
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Where does this data come from?
We re-check vendor prices continuously and score vendors on Finnrick blind-test results — samples bought anonymously and sent to a lab, not vendor claims. No vendor can pay to rank higher. See our full methodology.