Maca's apoptogenic qualities might be helpful for depression and anxiety. People who use maca report a mood and energy boost. One study found maca could reduce symptoms of anxiety and depression in postmenopausal women.
Maca powder is traditionally used to boost sexual performance, but clinical trials showing improvement are scarce. In one study, men taking maca showed more erectile improvement than those who did not. 
Hormone-sensitive conditions such as breast cancer, uterine cancer, ovarian cancer, endometriosis, or uterine fibroids: Extracts from maca might act like estrogen. If you have any condition that might be made worse by estrogen, do not use these extracts.
While maca is considered to be safe for most people, those who are pregnant, breastfeeding, people with liver or kidney disease should be careful and discuss with their healthcare team