Adults should get 150 mcg of iodine daily (220 mcg if you’re pregnant, 290 mcg if breastfeeding). Before you take any iodine or kelp-based supplement, talk with your doctor first.   You can satisfy your daily needs by eating: One serving of ocean fish  Two servings of low-fat yogurt  A few forkfuls of seaweed salad, such as kelp or wakame.