Biotics Research Liquid Iodine supplies 75mcg of iodine (as potassium iodide) per drop. Iodine is an essential trace mineral, and is vital to healthy thyroid function. Vegetarians may be at increased risk of iodine deficiency.Each drop supplies: Iodine (as potassium iodide); 75 mcg Directions1 drop 1 to 2 times each day as a dietary supplement or as other-wise directed by a healthcare professional.