Vitamins D and K with Sea-Iodine™ from Life Extension® features 125 mcg of vitamin D, 2,100 mcg of vitamin K from phytonadione, menaquinone-4 and menaquinone-7, plus 1,000 mcg of natural iodine from Sea-Iodine™ Complex. This complex features organic kelp, bladderwrack extract and potassium iodide.