Maca powder capsules are an excellent source of maca root, which has been used for centuries as a natural remedy for stress, fatigue, adrenal support, hormonal balance, menopause, low libido, sexual dysfunction and more. Maca root contains high levels of L-Dopa, a precursor to dopamine, serotonin, norepinephrine and epinephrine, the brain chemicals associated with mood, energy, focus and sex drive. 90 Veggie Caps.