Home > Newsletters > Need to Know > Set up an air filter at home Updated 29 June 2016 Action point 0 Wash your hair before you go to bed. That way you will rinse off all the pollen your hair has collected during the day. Read more about preventing allergies. More: Need to KnowSet up an air filter at home advertisement Other news Diet and nutrition Is canned or frozen produce bad for me? News Hand hygiene – how clean are your hands really? Medical Add asthma to list of possible causes of childhood obesity Medical Feeling down during spring? Blame your seasonal allergies News UP student wakes up from 11 week coma: ‘We’ve been surprised by how strong she is’ Parenting C-section rates have nearly doubled since 2000 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.