Used in dietary supplements for antioxidant support, helping protect cells from oxidative stress. Commonly found in grape seed and pine bark extracts, they support cardiovascular health by promoting healthy blood vessel function and maintaining strong capillaries. Applied in skincare products for their ability to improve skin elasticity and reduce signs of aging. Also studied for potential benefits in managing diabetes by supporting healthy blood sugar levels. Used in some oral health products due to antimicrobial and anti-inflammatory properties that may support gum health.