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 28 September 2016 Everyone needs a good eight hours of sleep per night, right? Everyone needs a good eight hours of sleep per night, right? Well, actually sleep researchers don’t really know exactly what the optimal amount of sleep is, but most experts recommend that adults should aim for at least seven hours a night. Studies suggest that any less than that on a regular basis may increase the risk of heart disease, obesity, depression and early death. Sadly, surveys have shown that many people around the world routinely operate on less than seven hours, probably to the detriment of for their long-term wellbeing. 0 More: Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxicHealth-in-Motion advertisement Other news Medical Nerve zap might ease pain of herniated disk Medical 5 ways to prepare yourself for a colonoscopy Diet and nutrition Put some healthful into holiday eating Medical Would you be offended if a friend visited and brought their own toilet paper? Medical Your guide to food allergies Lifestyle 6 things we learnt about testicular cancer with Cancercare’s Dr Greg hart 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.