Ashwagandha root is a herb that has been used in traditional Ayurvedic medicine of India for over 4,000 years and is thought to help improve physical energy and athletic ability, increase immunity and support sexual functions and fertility. Ashwagandha may also have a mild sedative effect on the central nervous system, thus acting as a muscle relaxant. Ashwagandha may help boost energy and support stress, anxiety, and sleep and is also known to aid with mental clarity and focus, and energy levels.