Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: Poo now in pill form to treat gut infection > Health-in-Motion 01 March 2013 Improve your posture Improve your posture – lengthen your spine and lift your head toward the sky. 0 NEXT ON HEALTH24X South Africa’s greatest swimmer needs a prodigy 53 minutes ago Partner content More: Daily Dose: Poo now in pill form to treat gut infectionHealth-in-Motion advertisement Read Health24’s Comments Policy Comment on this story 0 comments Comments have been closed for this article. Logout Comment 0 characters remaining Share on Facebook Loading comments... Other news Medical SA researchers find urine test better for rapid TB testing Medical SEE:7 of the world's most famous TB patients Medical TB patients dying without dignity as drug resistance soars Medical Diabetes: You can have a cheat meal and stay healthy Lifestyle Oil foils: your skin-care guide for acne-prone skin Medical SEE: How long should a cough last? From our sponsors How to care for your vaginal flora 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?