Food Sources

"The mineral content of foods is greatly affected by the soil from which they grew, and thus geographic location is the primary determinant of the mineral content of foods. For instance, iodine comes mostly from seawater, so the greater the distance from the sea, the lesser the iodine content in the soil. Iodine content of various foods includes: seaweed, 1 g, 16 to 2,984 mcg; cod fish, 3 oz., 99 mcg; low-fat yogurt, 8 oz., 75 mcg; iodized salt, 1.5 g, 71 mcg; reduced-fat milk, 8 oz., 56 mcg; chocolate ice cream, ½ cup, 30 mcg; one large egg, 24 mcg; canned tuna, 3 oz., 17 mcg; dried prunes, 5 prunes, 13 mcg; and one medium banana, 3 mcg."