ATP Complex is a combination of 100 mg of vitamin B2 and 500 mg of vitamin B3 (as non-flushing inositol hexanicotinate). These two essential vitamins are combined into a sustained release formula that makes them available to the body for about 24 hrs. These vitamins are the precursors for FADH2 and NADH, the cofactors required to produce ATP, the high energy molecule which is the body’s metabolic fuel. These cofactors play an important role in the oxidation and transport of iodide to tissues (thyroid, muscle, ovary, breast, etc.).*