You take organic beet for the nitrates. Your body turns those nitrates into nitric oxide, which relaxes blood vessels and helps blood move. That can make exercise feel easier and improve stamina. People usually drink beet juice or stir the powder into water about 2 to 3 hours before a workout.
Whole beet, juice, and powder all work, but the nitrate levels shift depending on how you prepare them. Choosing organic cuts down on pesticide residue, though the active compounds stay the same as in conventional beets.
Skip beet if you have low blood pressure or a history of kidney stones.