Men are often surprised to learn that their bodies produce small amounts of estrogen. Although estrogen is one of the primary female sex hormones, it also has significance for men. Adequate levels of estrogen are essential for male hormone balance and optimal health in men. Estrogen is also necessary for optimal function and the heart, brain and bones protection. Like all hormones, estrogen needs to be kept in balance. Chronic health conditions can occur as a result of estrogen levels being too high or too low. function and protection of the heart, brain and bones. Like all hormones, estrogen needs to be kept in balance. Chronic health conditions can occur as a result of estrogen levels being too high or too low.