Reviewed by the PeptideMind Team · Updated July 15, 2026

SS-31 Dosage Guide, Benefits & Side Effects

SS-31 stabilizes cardiolipin to restore mitochondrial ATP output, protecting heart, kidney, and muscle tissue from age-related decline.

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SS-31 Dosage Guide for Longevity & Anti-AgingSS-31 Dosage Calculator

SS-31 supports the mitochondria, the energy-producing parts of your cells.

Vial size

10 mg

Bacteriostatic water

3 mL

Dosing

500 mcg to 5 mg

Frequency

Daily

Cycle

4–8 weeks

Benefit

Longevity & Anti-Aging

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Basic Dosage Calculator

Calculate peptide doses with our visual syringe guide.

Peptide per vial

Target research quantity

Bac water added

What is SS-31?

SS-31 (Elamipretide) is a lab-made peptide specifically designed to target the energy-producing parts of your cells (mitochondria). It works by stabilizing the inner structure of mitochondria, which helps reduce cell damage and restore normal energy production. It's studied in research and clinical settings for heart failure, mitochondrial diseases, age-related decline, and injury from restricted blood flow.

Longevity

Research targets include cellular aging, senescence, and long-term healthspan.

Metabolic

Research targets include glucose regulation, insulin sensitivity, and energy metabolism.

Longevity

ss3

Metabolic

Is SS-31 FDA approved?

SS-31 is not an FDA-approved drug. It is intended for research purposes only and is not approved for human consumption, diagnostic, or therapeutic use.

Research Use Only

SS-31 has not been evaluated by the FDA for safety or efficacy in humans.

No Clinical Oversight

Not manufactured under FDA-regulated quality or clinical standards.

Unregulated Sourcing

Purity, dosing, and sourcing are not verified through FDA testing or oversight.

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How Does SS-31 Work?

It attaches to a fat molecule found specifically in the membrane of mitochondria, protecting it from the kind of damage that can cripple a cell's energy production. By keeping this membrane intact, it helps mitochondria run more efficiently and lose less energy as waste.

Binds a mitochondrial fat molecule

Attaches to a fat molecule found specifically in mitochondrial membranes.

Protects from damage

Shields it from the kind of damage that can cripple energy production.

Improves efficiency

Keeps mitochondria running efficiently with less energy wasted.

How to reconstitute SS-31

View guide

The materials you'll need and step-by-step instructions for safely mixing SS-31 with bacteriostatic water.

Materials needed

Your SS-31 vial (lyophilized)

Alcohol swabs

Bacteriostatic sterile water

3 mL syringes (Luer Lock tip)

25G or 27G needles (Luer Lock). Other gauges may also be acceptable.

Sharps container (optional)

Remove the caps

Remove the caps from both your SS-31 vial and your bacteriostatic water vial.

Sanitize the rubber stoppers

Wipe down the rubber stoppers on both vials with alcohol swabs and let them dry for about 3 minutes.

Attach the needle

Take your 3 mL syringe and needle. Twist the needle's plastic hub into the Luer Lock tip on the syringe to secure it.

Draw the bac water

Pull back on the plunger to draw your desired volume of bacteriostatic water. If you overfill, just push the excess back in until you reach the right marker on the syringe.

How much bac water? SS-31 typically comes in a 10 mg vial. We recommend 3 mL of bacteriostatic water, though anywhere between 1 mL and 3 mL is acceptable. For larger vials you can use up to 5 mL — more bac water makes microdosing easier, but insulin needles usually max out at 1 mL per injection. That means a lot of bac water might force you into multiple injections to hit your target dose. Unless you're microdosing, 2 mL per vial is a solid rule of thumb.

Insert the needle into the SS-31 vial

With the bac water in your syringe, insert the needle into the SS-31 vial at a slight angle to avoid pressure buildup.

Use a thin needle: Stick to 25G or higher to avoid damaging the rubber stopper. Higher gauge means a thinner needle.

Release the water gently

Let the water run gently down the side of the vial. Don't inject it forcefully.

Heads up: Sometimes the plunger pushes itself in as soon as the needle enters the vial. Hold the plunger back so you have full control over how fast the bac water enters.

Swirl to dissolve

Avoid shaking. Gently swirl, flip, and roll the vial to dissolve the powder.

Be patient: This usually takes 2 to 5 minutes of consistent swirling, mixing in a circular motion, and gently flipping the vial up and down. The water needs to run through the powder many times to fully dissolve it. Don't shake or get aggressive with it.

Check for full dissolution

The solution should be clear with no visible particles. If it's cloudy or clumpy, wait a minute and repeat the swirling step.

Cap, dispose, and store

Once you're done, cap the needle and dispose of it (ideally in a sharps container). Store the reconstituted SS-31 vial in the fridge whenever it's not in use. It will stay good for approximately 30 days.

How to Store SS-31

Freeze the dry powder for up to three years, protected from light. Once mixed with liquid, refrigerate and use within about a month, and don't refreeze it.

Lyophilized Storage

-20°C for up to 3 years, protected from light.

Reconstituted Storage

Refrigerate at 2–8°C and use within 28 days.

Handling Notes

Do not refreeze.

A smartphone displaying a "Storage Guide" for peptides, indicating a safe storage temperature range of 2–8°C, with warnings to keep away from light, heat, and freezing. The background is light blue, and additional tips on protecting the peptides are visible below the temperature range.

What Are the Benefits of SS-31?

What research says it may help with, and how it works in the body.

mitochondrial

: It protects a key fat molecule in the cell's energy centers (mitochondria) from being damaged by oxidation, reducing overall wear and tear on those energy centers.
: In patients with a mitochondrial muscle disease (PMM), it meaningfully improved how far they could walk in six minutes and how tired they felt.
: It helps the energy-producing machinery inside cells (mitochondria) work more efficiently, giving cells more usable energy.

cardiovascular

: It reduces the damage that happens when blood flow is cut off and then restored to tissue, and it supports healthy heart function.
: It improves the ability to exercise and reduces feelings of fatigue.
: In patients undergoing surgery, it lowered blood markers of heart damage and helped the heart's energy-producing cells function better.

antiaging

: In animal studies, it reversed the age-related drop-off in muscle performance.
: In research models of Alzheimer's disease, it showed protective effects on brain cells.
: By helping the cell's energy centers (mitochondria) work better, it supports the overall health of cells throughout the body.

What Are the Side Effects of SS-31?

Who should avoid it, warning signs to watch for, and what to know before combining it with other compounds.

Who Should Avoid It

: Known hypersensitivity to peptides
: Pregnancy or breastfeeding (limited data)

Stop Right Away If You Notice

: Severe injection site reactions
: Allergic reaction signs (rash, breathing difficulty)
: Unusual fatigue or weakness (paradoxical reaction)
: Cardiovascular symptoms
: Severe headaches or vision changes

Milder Signs to Watch For

Yellow or brown discoloration indicates degradationCloudy solution or visible particlesImproper storage conditions

Was it helpful?Yes

How Long Should a SS-31 Cycle Last?

This breaks down how long a typical SS-31 cycle runs and what research suggests happens at each stage. Research shows that staying on a peptide continuously, without a break, may make it less effective over time.

That's why most research protocols build in a break between cycles, often called a washout period, to let the body reset before starting again.

Day 1-3: Subtle energy improvements, reduced fatigue
Week 1-2: Better exercise endurance, faster recovery
Week 2-4: Improved stamina, clearer thinking, better sleep
Week 4-8: Significant exercise capacity improvements
Week 8-12: Sustained energy, potential biomarker changes

Cheat Sheets Featuring SS-31

See how SS-31 fits into a broader research stack with these free downloadable cheat sheets. Each one includes reference dose ranges, dosing frequency, and half-life for every peptide it covers. For research purposes only.

View all cheat sheets

Longevity Peptide Cheat Sheet

42 peptides

Master Peptide Cheat Sheet

78 peptides

Metabolic Peptide Cheat Sheet

14 peptides

SS-31 Research References

It is a phase 3 compound

3Research references

SS-31

SS-31 is a phase 3 compound

Age-Related Muscle Dysfunction Study

8 weeks in aged mice reversed age-related decline in muscle function, increased ATP production, and reduced oxidative stress.

2020

Barth Syndrome Clinical Trial

Phase 3 trial with 40mg daily for 48 weeks showed trends toward cardiac improvement in this rare mitochondrial disorder.

2021

Primary Mitochondrial Myopathy Phase 2 Trial

40mg daily for 12 weeks in 36 patients showed significant improvements in 6-minute walk test and fatigue scores with excellent safety profile.

2018

Frequently Asked Questions About SS-31

Straight answers on reconstitution, dosing, and safety, everything you need to research with confidence. For research reference only.

SS-31 (elamipretide) is a small, cell-permeable tetrapeptide that concentrates in the inner mitochondrial membrane, where it binds selectively to cardiolipin, a phospholipid critical to mitochondrial cristae structure and electron transport chain function. By stabilizing cardiolipin, SS-31 is reported to help maintain cristae architecture, reduce excess reactive oxygen species (ROS) production, and support more efficient ATP generation, particularly in high-energy-demand tissues such as heart, kidney, brain, and skeletal muscle. Its distinct mechanism (membrane/cardiolipin binding rather than receptor binding) is why it is studied separately from most other research peptides.

Under the name elamipretide, SS-31 received FDA approval in September 2025 for Barth syndrome, a rare genetic mitochondrial disorder — this is currently its only approved medical use. Outside that approved indication, it has been studied in clinical trials for conditions such as heart failure, ischemia-reperfusion injury, age-related macular degeneration, and mitochondrial myopathies, but is not FDA-approved for those uses. When sold by research-chemical vendors, SS-31 is typically labeled 'for research use only, not for human consumption,' and any use outside its approved indication and outside clinical trial settings is not medically supervised or approved.

Clinical trial dosing (e.g., the TAZPOWER trial in Barth syndrome) has used subcutaneous doses up to about 40 mg/day. In online research and biohacking communities, reported protocols are typically much lower, often in the range of 1-10 mg subcutaneously per day, with some discussions of 10-20 mg/day for shorter cycles (commonly 4-8 weeks followed by a break). There is no established consensus 'ideal' dose outside clinical trials, and community-reported doses are anecdotal, not clinically validated. Anyone considering use should understand that dosing outside approved clinical protocols carries unknown risk.

In clinical trials, SS-31 (elamipretide) has generally shown a favorable safety profile over treatment periods up to 24 weeks. The most commonly reported effects are mild injection-site reactions (redness or soreness, usually resolving within about 24 hours), occasional transient nausea (more common at higher doses), and occasional mild headache. Serious adverse events have not been consistently documented at typical research/wellness-protocol doses, but individuals with kidney disease, cardiac conditions, or active malignancy are frequently flagged in vendor and clinic materials as needing special caution or physician evaluation before use. As with any research compound, long-term safety data outside approved clinical use remains limited.

Lyophilized (freeze-dried, unreconstituted) SS-31 is generally recommended to be stored frozen at approximately -20°C for long-term storage (commonly cited stability up to ~24 months), or refrigerated at 2-8°C for shorter-term storage (up to a few months). Once reconstituted with bacteriostatic or sterile water, the solution should be kept refrigerated at 2-8°C and is typically recommended for use within about 4 weeks; reconstituted solution should not be refrozen, as freeze-thaw cycles can degrade the peptide. These are general peptide-handling conventions reported by suppliers and community sources rather than official prescribing guidance, since SS-31 (as elamipretide) approved use follows its own clinical formulation and handling protocol.

Plasma half-life after subcutaneous administration is reported to be relatively short, on the order of about 2 hours, with peak plasma concentration (Cmax) reached roughly 1-2 hours after injection. However, because SS-31 binds with high affinity to cardiolipin in mitochondrial membranes, tissue retention in organs like the heart, kidney, and muscle is reported to be considerably longer than plasma levels would suggest. This is part of why most protocols, whether clinical or community-reported, use once-daily subcutaneous dosing rather than multiple daily doses.

There are no formal clinical studies evaluating SS-31 in combination with other peptides. Community and vendor discussions sometimes mention pairing it with peptides like Epithalon on the rationale that they act through different, potentially complementary mechanisms (mitochondrial/cardiolipin support versus other cellular pathways), but this is speculative and based on anecdotal reports rather than controlled research. Anyone considering combining research compounds should recognize that interaction effects and safety are largely unstudied.

As the approved drug elamipretide, SS-31 is available by prescription for its FDA-approved indication (Barth syndrome). Separately, unapproved SS-31 peptide is sold by research-chemical suppliers labeled strictly for laboratory/research use, not for human consumption. Regulations on purchasing and possessing research peptides vary by country and region, and quality/purity can vary significantly between suppliers, a recurring complaint in online peptide communities. Buyers should be aware that product sold this way is not regulated, tested, or approved for human use in the way the prescription product is.

SS-31 Dosage Guide, Benefits & Side Effects

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What is SS-31?