Ecklonia cava is a brown seaweed from the coastal waters of Japan and Korea. It contains polyphenols called phlorotannins, antioxidants specific to brown algae that researchers have studied most closely.
People take Ecklonia cava extract to strengthen the bodys own antioxidant defenses against oxidative stress. Common uses include promoting skin elasticity and a smoother complexion, easing joint stiffness through the day, and helping keep blood sugar levels steady in already healthy ranges.
Capsule or tablet forms typically supply a standardised 25:1 extract (often labeled Seanol-F). Taking the dose with a meal improves absorption. Follow the label directions for your particular product, since potency differs across extracts.
Caution: Ecklonia cava can slow blood clotting. Anyone using anticoagulants or antiplatelet drugs such as warfarin or aspirin should check with a healthcare provider before use. Safety during pregnancy and breastfeeding is not well established.