Many people don’t get enough sleep, with a recent study claiming that the average Briton gets just six hours of shut-eye a night.
Reasons for sleepless nights vary and are often linked to underlying psychological issues, but a new study claims that it could be down to simply not having drunk enough water the day before.
According to research carried out by academics at Penn State University, Pennsylvania, people who slept for six hours a night had significantly more concentrated urine and were more dehydrated compared to those who regularly slept eight hours a night, which is the recommended amount.
The study, published in the journal SLEEP, involved more than 20,000 adults in the US and China, all of whom had their sleeping habits and urine samples analysed.
The authors concluded that the links between sleep quality and hydration are down to a hormone in the body called vasopressin.