We spend over one-third of our lives asleep, but this time is not being wasted. A lack of sleep can lead to health problems and an inability to function properly. Unfortunately for some, around half of the population snore, resulting in less sleep for the other half. You could also be sharing your bed with up to 10 million mites inhabiting your mattress. Around a third of people suffer from insomnia, but we see how amino acids in warm milk can stimulate the "sleep hormone".