Find a wide range of natural herbal ingredient combinations known to support a man’s healthy sexual activity and overall vitality. Natural ingredients such as powerful Ashwaganda, Tribulus terrestris, Fenugreek, Maca and ZMA can naturally and effectively boost levels and increase libido. In general, most boosters work best if the user is over 30 years old because this is around the age that the body’s production usually decreases, but all bodies and hormone levels are individual.