E Control RX is your weapon against estrogen. Excessively high levels of estrogen affects your body in a number of ways including excess fat, gynecomastia (man boobs), low libido, and excess water retention. E Control RX will help get your Estrogen levels in check and help you achieve a leaner, harder physique. In addition, taking compounds that may cause excessively high estrogen (like testosterone & compounds that convert to testosterone such as 4-Andro) often require an anti-estrogen supplement. E Control RX is the perfect fit alongside any 4-DHEA cycle.