E-Form™, the topical anti-estrogen, contains Formestane, a “suicide inhibitor” of the aromatase enzyme. This substance has been shown to reduces excess estrogen in the body by blocking the production of estrogen from androgenic precursors. E-Form™ can be a very effective estrogen controller, and can alleviate the estrogenic side-effects associated with the use of aromatizable androgens. This supplement is ideal for estrogen control during a cycle.