Circulatory and Heart Health. 500 mg Per Capsule. Dietary Supplement. Total Wellness For Mind, Body & Home. Unsurpassed Purity & Potency. Science-Backed Quality Since 1969. Give your cardiovascular system a nutritional tune-up with the free-radical fighting power of Swanson Hesperidin. An antioxidant flavonoid found in citrus fruits like lemons, oranges and tangelos, Hesperidin helps protect against free radicals and helps support cardiovascular wellness.