Click to enlarge /uploads/products/thumb/cartthumb/ATD.jpeg More information ATD Is an ideal product to be used during a cycle or as a PCT. By using it during a cycle you can greatly reduce the chance of excess Estrogen and Estrogen related side effects as it binds to the Aromitise enzyme making it less active. Because of the enzyme binding, it helps with the increase of free Testosterone thus making ATD an excellent product for your PCT.* Binds to Aromatase Enzyme.* Use during a cycle/PCT.* Helps decrease Estrogen related side effects.