Maca extract is a concentrated Peruvian root powder that has had its fibrous bulk removed. Macamides and alkaloids remain at higher levels than what you get from plain whole-root powder. Removing the fiber makes it easier to digest and helps avoid the stomach upset some people experience with raw maca. The extract is more potent, so you use a smaller amount than raw powder.
People reach for maca extract for energy, libido, and steady mood. Many add it to a morning or pre-workout stack to support endurance and vitality. Taking it with food tends to improve tolerance and absorption.
Start low to see how your body reacts. Maca contains goitrogens, so skip it if you have a thyroid condition. Avoid it with hormone-sensitive conditions such as breast cancer, and during pregnancy or nursing because safety data is thin. Check with your doctor.