Will this fix my fatigue?

If the fatigue is driven by something testable — iron deficiency, thyroid, sleep apnoea, depression — this stack will not touch it, and those should be excluded first with a doctor. Mitochondrial support is a plausible target for the residue that remains after the obvious causes are ruled out.

Is exercise really better than these compounds?

For mitochondrial biogenesis, yes, unambiguously, and by a wide margin of human evidence. The compounds address clearance and efficiency, which exercise addresses less directly. That is the honest case for combining them rather than substituting.

The mitochondrial reset stack

Mitochondrial support means three different things that get constantly conflated: making existing mitochondria run cleaner, clearing damaged ones, and making more. A stack is only coherent if it covers the ones you actually need.

The bottleneck

Cellular energy production. Impaired mitochondrial function is measurably associated with depressive symptoms and with the specific quality of fatigue that sleep does not resolve.

What is in it, and why

Urolithin AEvidence grade: Human trials
Mitophagy — clearing damaged mitochondria. The best human trial data of anything in this stack.
Timing: Daily with food, continuously. Trials ran four months.
NAD+ precursorsEvidence grade: Human trials
Restores the electron carrier and sirtuin substrate that declines with age.
Timing: Morning. NAD+ metabolism follows a strong circadian rhythm.
SS-31Evidence grade: Early human data
Efficiency — stabilises cardiolipin so the electron transport chain leaks fewer electrons and produces less oxidative stress.
Timing: Daily subcutaneous in trial protocols, under supervision.

Why these go together

The three cover genuinely different mechanisms — clearance, substrate and efficiency — so this is one of the few stacks where the combination is mechanistically justified rather than just additive dosing.
Fasting and exercise induce mitophagy and biogenesis respectively, filling the one gap the compounds leave.

Conflicts and risks

Consider this

None of the three has been tested together in humans.

Consider this

SS-31 has missed primary endpoints in multiple late-stage trials and is not available outside trial settings.

Consider this

NAD+ metabolism intersects with tumour biology; anyone with active cancer should discuss it with an oncologist rather than self-prescribing.

The practice protocol

This half is not optional. It shares the mechanism, and it usually has the better evidence.

1.Zone-2 cardio, three to four sessions weekly. This is the biogenesis leg and no compound here replaces it.
2.A twelve-to-fourteen hour overnight fasting window to trigger endogenous mitophagy.
3.Protect deep sleep — mitophagy and cellular housekeeping are concentrated there.
4.Morning daylight to anchor the circadian rhythm that mitochondrial gene expression follows.

Nutrition and sleep foundations

These gate everything above them. A stack running on five hours of sleep and insufficient protein is mostly an expensive placebo.

B-vitamin and CoQ10 sufficiency for the electron transport chain.
Magnesium, required by hundreds of ATP-dependent enzymes.
Reduce alcohol — it depletes NAD+ directly and works against the whole stack.
Iron status if fatigue is prominent; deficiency mimics all of this and is trivially testable.

The evidence ceiling

Urolithin A and NAD+ precursors have completed human RCTs with modest functional effects and no mood or cognitive endpoints. SS-31 is in trials for mitochondrial disease and has never been tested for fatigue or mood. Zone-2 training has more human evidence than all three combined.

Common questions

: If the fatigue is driven by something testable — iron deficiency, thyroid, sleep apnoea, depression — this stack will not touch it, and those should be excluded first with a doctor. Mitochondrial support is a plausible target for the residue that remains after the obvious causes are ruled out.
: For mitochondrial biogenesis, yes, unambiguously, and by a wide margin of human evidence. The compounds address clearance and efficiency, which exercise addresses less directly. That is the honest case for combining them rather than substituting.