Nitric oxide: the molecule behind everything

Nitric oxide is produced in the inner lining of blood vessels and signals smooth muscle to relax — vasodilation. Wider vessels mean more blood flow, lower resistance, and lower blood pressure. This single mechanism underlies exercise capacity, circulation, cognitive performance, and recovery.

Why it drops with age

Endothelial function declines gradually. Oxidative stress reduces NO bioavailability. Insulin resistance impairs synthesis. The result is a 30–50% reduction in baseline NO availability between 30 and 60.

What supports it

L-arginine and L-citrulline as direct substrates. Beetroot for dietary nitrates. Pomegranate to extend NO half-life. Regular cardio upregulates the production machinery.