What Does SS-31 Do for Mitochondria, and Would a Healthy Person Notice a Difference?

What Is SS-31?

SS-31, also known as elamipretide, is a small peptide designed to target the mitochondria—the structures inside cells that produce energy. It binds to cardiolipin, a fat molecule in the inner mitochondrial membrane that helps keep the energy-producing machinery working properly.

By stabilizing cardiolipin, SS-31 is thought to improve mitochondrial efficiency and reduce oxidative stress.

Is It Approved?

In 2025, the FDA granted accelerated approval to elamipretide (brand name Forzinity) for Barth syndrome, a rare genetic disease that affects mitochondria and causes muscle weakness, heart problems, and fatigue.

It has also been studied in other mitochondrial diseases, heart failure, and age-related eye conditions, with mixed results.

Would a Healthy Person Notice a Difference?

There's no good evidence that SS-31 improves energy, performance, or longevity in healthy people.

• Animal studies show improved mitochondrial function in aged muscles and hearts
• Human trials have focused on people with significant disease
• Mitochondria in healthy people may not have the same dysfunction that SS-31 targets

In other words, it's designed to fix something that's broken. If your mitochondria are working well, there may be little for it to improve.

Safety and Access

• The most common side effects in trials were injection site reactions
• Long-term effects in healthy people are unknown
• Products sold online as "SS-31" are unregulated and not the same as the approved medication

Proven Ways to Support Mitochondrial Health

• Exercise: Especially aerobic training and high-intensity intervals, which increase the number and efficiency of mitochondria
• Strength training
• Quality sleep
• A nutrient-rich diet
• Avoiding smoking and excess alcohol

If you're curious about longevity peptides, talk with a provider: Talk to a Heva Specialist

The Bottom Line

SS-31 targets mitochondrial dysfunction and is approved for a rare mitochondrial disease. For healthy people, there's no evidence it provides noticeable benefits—exercise remains the best mitochondrial booster.