Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxic > Health-in-Motion 31 August 2016 We all need to sleep regularly We all need to sleep regularly. But why? One popular scientific theory has it that sleep evolved to allow connections (or synapses) between neurons in the brain to be pruned down, thus making room for the myriad of brand new memories that will accumulate during the following day. The idea received support recently when US scientists found that synapses in the brains of mice were 18 percent smaller after a period of sleep than they were before. Think of it as a natural and necessary process of mental housekeeping. 0 More: Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxicHealth-in-Motion advertisement Other news Medical Exercising with allergies – what you should know Medical Do therapists need therapy? Lifestyle Scientists closer to drug that cuts nicotine dependence Diet and nutrition Gluten-free craze: But what about people who really can't have gluten? News Drug addicts target patients for their medication News Health dept commits to resolve critical ARV shortages before year end From our sponsors Dementia and Incontinence: what you need to know Tell-tale signs you need a mattress upgrade Keen to win a R2 000 voucher? Good health begins in your gastrointestinal tract Live healthier Gut health » Can't lose weight? Blame it on your gut Our nutrition experts weigh in on why gut health is such an important factor in weight loss, on World Obesity Day. Sleep better » Yes, there is such a thing as too much sleep A new study confirms that too little sleep can impair your brain, but interestingly, too much sleep is also a problem.