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 Medical How biting your nails can cause infections Fitness These beer lovers created a workout to help you ‘earn your booze’ Medical Stimulating one brain area may ease tough-to-treat depression Medical Nearly 1 in 12 US kids has a food allergy Medical Can hearing loss influence your balance? News Could certain personal hygiene products and cosmetics cause early puberty in girls? 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 Smoking dangers » Hubbly hooking lots of young adults on tobacco Hookah smokers are inhaling benzene Many young adults misinformed about hookahs Hookah pipes far from harmless, study warns In addition to toxic substances from tobacco and nicotine, hookah smoke exposes users to charcoal combustion products, including large amounts of carbon monoxide. Managing incontinence » 5 avoidable triggers that can make urinary incontinence worse Urinary incontinence is a manageable condition – here are a few common triggers of urinary leakage.