100mg of Beetroot Extract standardized to 25% Betalains. Beet root is a rich source of many beneficial phytonutrient compounds. One of those powerhouse phytonutrient compounds is Betalains. Betalains are a group of reddish pigments naturally found in red beets that give beets their red color. In addition to providing color for beets, Betalains have shown to have many health & wellness benefits. The concentrated Betalains in CardiO2 Chews have been clinically shown to support 5 key benefits for physical activity: energy, endurance, faster recovery from exercise, joint mobility, and healthy circulation.