How to think about stacking SS-31
- SS-31 is elamipretide, and elamipretide now has a label: Forzinity received accelerated FDA approval on 2025-09-19 for muscle strength in Barth syndrome (patients of at least 30 kg), at 40 mg subcutaneously once daily from an 80 mg/mL vial. Every registered subcutaneous trial read for this site used the same 40 mg, while vendor pages cite 5 to 10 mg for 'SS-31', a figure no label or trial states.
- The label's 40 mg is 0.5 mL (50 units) of the 80 mg/mL product. Research vials are 5, 10 and 50 mg: only the 50 mg vial reaches 40 mg in one U-100 syringe (1 mL of water, 50 mg/mL, 80 units), and a 5 or 10 mg vial cannot hold that amount at all — which matters when a stack sheet lists SS-31 beside a microgram-scale partner.
- SS-31 targets cardiolipin on the inner mitochondrial membrane. That is a structural target, distinct from MOTS-c's AMPK signaling, which is why the two are the coherent mitochondrial pairing.
- It has an actual clinical trial record (developed as elamipretide), including trials that did not meet primary endpoints. Absent evidence and disappointing evidence are different things, and this is the latter.
- It is not FDA-approved for the uses discussed in research contexts.
- No controlled trial has studied SS-31 combined with anything.
Combinations in detail
Mitochondrial support
SS-31 + MOTS-c- Why it is proposed
- Structural membrane targeting alongside AMPK signaling — two genuinely different approaches to mitochondrial function, which makes this the best-constructed pairing in the mitochondrial group.
- What is reported in practice
- Reported as separate vials, commonly concurrent.
- Cautions specific to this combination
- No combination data. SS-31's own trial record is mixed, which should temper expectations for anything built on it.
Cellular-aging stack
SS-31 + NAD+ or Epithalon- Why it is proposed
- Combines membrane-targeted mitochondrial support with either NAD+ precursor supply or the Khavinson longevity bioregulator.
- What is reported in practice
- Community-reported longevity pairings, often in defined courses.
- Cautions specific to this combination
- NAD+ injection has its own thin evidence base; Epithalon's literature is concentrated in one research tradition. Both pairings are thematic rather than mechanistically specified.
What to avoid, and why
- Reading elamipretide's clinical development as validation — several trials did not meet primary endpoints, which is information rather than a gap.
- Combining it with another membrane-targeted mitochondrial compound expecting additive effect; the coherent partner acts through a different mechanism.
- Treating community dosing as established; approved dosing does not exist.
Related reading
Every combination described here is reported practice or mechanism-level reasoning. No controlled trial has studied any of these combinations, and nothing on this page is a personal protocol, a dose recommendation, or medical advice.