Biologically Active Substances and Sleep

The influences of dietary characteristics on sleep quality in humans currently constitute an acute problem, as harmonious interactions with the outside world in urbanized societies impose the need for a sufficient level of wakefulness, which is provided by full-length sleep. An important factor is sleep quality: fragmented sleep, regardless of duration, will leave a person lacking energy. Sleep quality depends not only on sleep hygiene, but also on the characteristics of the diet, which can affect the proportions of particular phases and stages of sleep. The aim of this review is to discuss the most important studies on the effects of dietary supplements on sleep quality and duration.