Nutrafol works to restore hair growth by lowering stress and androgens in the body, which are hormones that contribute to male and female growth and reproduction. Ingredients in the supplements, such as Sensoril ashwagandha, aid in stress resistance by balancing cortisol levels, a hormone that plays a role in the body's stress response. Cortisol can also cause hair follicles to transition prematurely from growth to rest, where hair can no longer grow. This means that chronic stress may be interfering with hair growth. Thankfully, the supplements from Nutrafol can work to neutralize free radicals and inflammatory molecules that inhibit hair growth.