There are many reported benefits from a Persian herb called Maca. It is considered to be an adaptogenic herb which means it helps you better deal with physical and emotional stress. The following claims have been made about Maca: increases energy, stamina & endurance, balances male & female hormone levels, benefits the circulatory system, nourishes the glands, calms the nerves, aids digestion, supports the adrenals, improves athletic performance & sexual functioning, increases libido, enhances emotional well-being, may reduce symptoms of depression & anxiety, promotes deeper sleep and enhances memory & brain function.

I have been using the herb for several months now and notice increased energy, improved exercise performance and enhanced workout recovery. 

Dosage ranges from 1,000 to 3,000 mg per day have been recommend. I think it would be best to divide the daily dose over 2-3 meals.