Fatigue is one of the most consistently reported perimenopause complaints, and both SS-31 and NAD+ show up in research conversations about mitochondrial support. They intervene at different points in the same broader system, which matters for how you think about choosing between them.
NAD+: Replenishing the Coenzyme Pool
NAD+ is a coenzyme mitochondria need broadly across energy metabolism, and its natural decline with age is well documented in the research literature. Direct injectable NAD+ replenishes this pool without relying on oral precursor conversion.
SS-31: Structural Membrane Support
SS-31 works differently — it binds cardiolipin, a phospholipid in the inner mitochondrial membrane essential to the electron transport chain’s structure. Research interest centers on whether stabilizing that membrane structure improves mitochondrial efficiency under stress, a mechanism distinct from simply having more NAD+ available.
Which to Start With
NAD+ has the broader and more established research base for general fatigue and cellular energy, making it the more common starting point. SS-31’s more targeted mitochondrial-membrane mechanism is of interest for those wanting to explore a different angle after establishing a baseline response to NAD+, or for more specifically cardiac- or muscle-fatigue-focused research interest.
Sourcing
Both are available for research purposes through the following vendors.