Beet root is an additive with a high nitrate content that’s said to improve the physical performance secondary to nitric oxide. He seems to have some evidence of this claim in healthy athletes.
Recommended dosage, active amounts, other details
Beetroot tends to be dosed on the nitrate content by about 0.1-0.2mmol/kg being the target of nitrates. This is about 436mg to get a person, that will be comparable to half a kilogram of the beetroots themselves. Consumption of beetroots for the nitrate content could be either by means of a puree or a smoothie, or the beets themselves may be baked in a toaster into chips.
The aforementioned cooking methods don’t appear to reduce the nitrate content.