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 27 November 2017 The many electronic screens we watch on a daily basis are bad for our sleep. The many electronic screens we watch on a daily basis are bad for our sleep. Devices like smartphones, computer screens and tablets emit blue light which is known to suppress the production of a hormone called melatonin that is associated with sleep and the normal functioning of our body cycles. A recent study shows that this kind of light has a detrimental impact, not only on the duration of sleep, but also on its quality. Screens that emit red light, by contrast, do not have these negative effects. 0 More: Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxicHealth-in-Motion advertisement Other news News Good Sex? Bad Sex? Rad Sex? Lifestyle Here's why you should stay with one doctor for life Fitness How to prevent the 5 most common gym injuries Fitness Use this workout plan to master the superman push-up in under a month Diet and nutrition 8 prebiotic foods you should probably add to your diet Sex Can you really get an STD from kissing? From our sponsors Tell-tale signs you need a mattress upgrade Keen to win a R2 000 voucher? Good health begins in your gastrointestinal tract ACC 200 works fast to break down mucus Live healthier Contraceptives and you » Scientists create new contraceptive from seaweed Poor long-term birth control training leads to 'accidents' 7 birth control myths you should stop believing Will the Pill make you gain weight? Can you fall pregnant while breastfeeding? We bust seven common myths about birth control. Your digestive health » Causes of digestive disorders 9 habits that could hurt your digestive system Your tummy rumblings might help diagnose bowel disorder With the assistance of an 'acoustic belt', doctors can now determine the cause of your tummy troubles.