Home > News Updated 26 October 2016 Health24 Health Challenge: Week 15 It's time for our weekly health challenge! Find out if you can score a perfect 10 on our quiz. 0 Joshua Carstens NEXT ON HEALTH24X Win R5 000 with the Health of the Nation Survey 2016-11-14 09:34 More: News advertisement Read Health24’s Comments Policy Comment on this story 0 comments Add your comment Thank you, your comment has been submitted. Logout Comment 0 characters remaining Share on Facebook Logout Comment 0 characters remaining Share on Facebook Loading comments... Other news News Win R5 000 with the Health of the Nation Survey Diet and nutrition Worries that ‘sugar tax’ is too low Medical schemes Gordhan outlines initial focus of NHI Diet and nutrition Budget: Sugar tax watered down to only 11% Diet and nutrition Gordhan confirms: 'Sugar tax' coming later this year News Health24 Health Challenge: Week 29 From our sponsors 10 facts about diabetes and insulin you need to know How to care for your vaginal flora JHB - Free Caregiver Workshop with TENA experts - 15 February JHB - Free home visit and assessment with a TENA nurse advisor Live healthier Hello? » SEE: Interesting facts about hearing loss Earworms: Let it go Is it bad to sleep with earplugs all the time? SEE: Do women hear better than men? The reason why men often appear not to be listening could be because they actually can't hear you. Confident smile? » Acidic drinks can harm your kids' smiles The facts on bleaching your teeth Am I taking good care of my teeth? Why are my teeth stained? We know the rules – brush your teeth twice a day and floss to keep them healthy. But, have you ever wondered what causes those stains that sometimes appear?