A man and his dog getting ready for a morning walk.

The free radical theory of aging, explained by a dietitian: what Harman proposed in 1956, what the antioxidant trials found,...

A woman walking out of the water after a cold morning swim

Hormesis: how a small dose of stress makes cells stronger while a large dose does harm. What the research actually...

Red haired woman standing by the window at dusk with a cup of green tea

Cellular health is how well your cells make energy, defend against damage, and repair themselves. What changes with age, and...

Couple riding their bikes in the evening

CoQ10 and mitochondria work together to produce cellular energy. See what the research shows about tissue levels, age, absorption, and...

A dried brown leaf beside fresh green sprigs

Zombie cells accumulate as you age. See what senolytic supplements, fisetin, fasting, and calorie restriction have actually been shown to...

An assortment of supplement bottles on a counter

Healthy aging after 40 is shaped by oxidative stress, mitochondrial decline, and inflammation. Here is what the long-game evidence supports,...

Man working on his car during the golden hour

Inflammation and oxidative stress in aging form a self-reinforcing loop. Read what the science says about slowing it down and...

A woman resting on a bench in a green forest with a water bottle beside her

How oxidative stress and aging connect inside the cell: lipid peroxidation, Nrf2 and your own antioxidant enzymes, and why no...

Glowing red ember representing the subtleness of inflammaging

What is inflammaging? It's the chronic, low-grade inflammation linked to most age-related decline. Here's the science and strategies for healthier...

Two people walking along a wooded path at sunset

Lifespan vs healthspan: the gap averages 9.6 years worldwide and 12.4 in the US. What the difference means, why it...