Mitochondrial dysfunction
Your power plants, and what wears them out.
Mitochondria produce ATP, the energy currency of every cell. Their DNA is poorly protected and sits right next to where free radicals are made, which makes it especially vulnerable. With age, mutations pile up.
Energy yield falls, free radical production rises, which damages the mitochondria further still. This vicious circle explains much of the decline in energy, endurance and function seen over the years.
What this pillar covers
Mitochondrial biogenesis
How to build new healthy mitochondria: HIIT, endurance work, cold exposure and hormetic signals.
Mitophagy
The selective removal of faulty mitochondria, and how to stimulate it (fasting, exercise, urolithin A).
Cofactors and support
NAD+, CoQ10, L-carnitine, creatine, magnesium: what has solid data behind it and what remains speculative.
VO2 max
One of the best predictors of all-cause mortality, and how to improve it at any age.
Why it matters
Energy is not a vague feeling: it is measurable biochemical output. When it falls, everything falls with it, from muscle to brain, because the hungriest organs suffer first.
And it is the hallmark that responds fastest to training. A few weeks of well-run exercise is enough to raise both the number and the quality of mitochondria, at any age.
No molecule rivals exercise for building new mitochondria. It is the one signal the body understands without ambiguity.
Where to start
Build the aerobic base
Three to four hours of moderate effort a week: the foundation that multiplies mitochondria.
Add intensity
One or two short high-intensity sessions a week to push biogenesis and VO2 max.
Support without overloading
Magnesium, creatine and decent B vitamin status before considering pricier supplements.