"Together use 100% sustainable wild harvested ascophyllum seaweed from the UK to make their iodine supplement. The seaweed is also naturally rich in all the minerals and micronutrients needed for the proper transport and metabolism of iodine including selenium, tyrosine, zinc, copper, vitamins A, B2, B3, B6 and C making this supplement a highly bioavailable source. Each batch is certified organic and lab-tested for heavy metals, microbiology, pesticides and iodine content to ensure maximum purity and consistency. "