Sleep aids are over the counter supplements which are designed to assist in promoting deep, restful sleep patterns. Sleep is an often overlooked ingredient of the modern lifestyle. Lack of sleep can manifest itself in many ways but has been linked to elevated cortisol (a hormone that causes people to accumulate more body fat over time), lowered leptin levels and a general decrease in physical performance, wellbeing and cognitive function. Sleep aids are designed to remedy this effect. The sleep aids we have available promote natural sleep and assist in both recovery from stress, as well as enhancing performance indirectly at the same time.