3rd party tested by FDA registered ISO 17025 laboratory. Life-Enhancement Products manufacturers all there cutting edge products in their cGMP certified, FDA registered, USDA organic certified facility to ensure the highest quality, purest ingredients are always used. Essential formula for thyroid protection and performance. Physician formulated. USP grade potassium iodide. High potency formulation-20mg of Iodine (KI) along with the most bioavailable form of selenium as selenomethionine. Ultra Pure Iodine Plus is a powerful and potent supplement that contains 20mg of iodine from USP potassium iodide along with the essential cofactor selenium in its most bioavailable form.