Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: Walk your way to better brain health > Health-in-Motion 12 October 2016 Non-toxic batteries Medical visionaries believe that we’re not far from the day when doctors will routinely give us edible electronic devices to swallow which will diagnose or even treat various diseases. But how does one power these tiny machines without having to worry about how long they’ll survive in the body and whether they are potentially poisonous? One team of scientists is making progress with edible, non-toxic batteries made out of melanin pigments which occur naturally in the skin, hair and eyes. These devices would simply dissolve after having done their job. 0 More: Daily Dose: Walk your way to better brain healthHealth-in-Motion advertisement Other news Medical 3 causes of a burst eardrum Medical Early treatment gets better results for rheumatoid arthritis Diet and nutrition 'Spare tyre' increases risk of early death Medical Scientists find DNA link between early puberty and cancer Medical Blood test may gauge death risk after surgery Medical Common nutrient increases blood clotting risk From our sponsors K Naomi takes a stand and shows women how to fight back WIN a R2000 Skin Renewal voucher! Constipation in women SA's old diesel vehicles continue to fuel allergies Live healthier Are you sure? » Aid your digestion What are digestive disorders? Are you really constipated? Many people think that if they do not have two or more bowel movements every single day of their lives they are constipated. This is patently not true, writes DietDoc. True of False? » SEE: How anaphylactic shock affects your body Stop believing these 10 allergy myths Do you still believe that hay fever is caused by hay? Or that food allergies are really common? No, and no again. We bust 10 myths about allergies.