Withanis somnifera (Ashwagandha ) Capsule improves the ability of the body to maintain the physical efforts. It also assists the body adapt the different types of stress as it also works as an adaptogen by promoting the ability of the body to resist the stress. Ashwagandha is extensively used in various tonics and formulas. Ashwagandha is basically an aphrodisiac (libido enhancer) in men.