(Impotence, menopause, stress) 60 capsules. Nutritional maca studies indicate that it contains: proteins, essential amino acids, carbohydrates, fibres, vitamins (B1, B2, B6), and minerals such as iron, calcium, phosphorus, potassium sodium. The nutritional benefits of this Andean root have been considered in medical studies, where it has shown its nourishing action in anemias, improvements of growth (in animals), and energy properties and anti-stress. Maca and impotence, Maca and menopause, Maca and stress.