Beet Root
Beta vulgaris
Also known as: Beetroot, Table Beet, Red Beet
Overview
One of the richest dietary sources of inorganic nitrate, which the body converts to nitric oxide, a molecule that helps relax blood vessels. Pooled analyses of randomized trials find an average drop in clinic-measured systolic (top number) blood pressure of about 4-5 mmHg; effects on diastolic pressure and on 24-hour ambulatory readings have been less consistent, and reviewers grade the overall certainty of the evidence as low to moderate. For exercise, the effect is narrower than it is usually sold: pooled evidence shows no reliable gain in time-trial or race speed, but a small, real benefit to endurance capacity, meaning how long you can hold a hard effort. That gain depends on dose and timing, is clearest in recreationally active people, and largely disappears in well-trained endurance athletes.
Proposed mechanism
Dietary nitrate → nitrite → nitric oxide (NO) via commensal oral bacteria and enzymatic reduction. NO is a potent vasodilator, improving oxygen delivery to muscles and brain. Betaine supports methylation and homocysteine reduction.
Mechanisms describe how researchers think a compound may act, often from laboratory work — a proposed mechanism is not proof of a clinical effect in people.