Ashwagandha is known to boost testosterone in men, but don't let that deter you. Some women fear that the testosterone-boosting effects of ashwagandha may have undesirable consequences, but there is nothing to fear.  Ashwagandha adapts to the body's needs. That's why it's called an adaptogen. It works on the body's endocrine (hormone) system to fix the body's hormonal imbalances in the body. As such, it can help you boost estrogen levels without necessarily giving you extra testosterone.