Inside Health Folgen

Dr Mark Porter finds out about the latest research investigating why people with HIV very rarely get multiple sclerosis. What does it mean for the cause of MS and possible future treatments? Also in the programme how much is black skin at reduced risk of skin cancer from exposure to the sun? Why iron overload can often go undiagnosed and the training for the nose that can help recover a lost sense of smell.

Mark Porter investigates a new research trial which shows that paracetamol doesn't help back pain. And why are blood thinning drugs being overused in NHS hospitals? New laws on limits for driving on prescribed drugs come into force in March 2015. Which prescription drugs are included and what does it mean for people taking them? Also in the programme, can any medications help get rid of kidney stones?

Some media coverage has suggested that there is a link between eating junk food and the rise of conditions like Crohn's disease and ulcerative colitis which involve inflammation of the digestive system. Mark Porter questions the evidence. As school's out for summer Mark finds out why teachers' voices need a rest. He also examines whether cholesterol lowering spreads and drinks do what they suggest. Also in the programme: is frying with olive oil harmful or the healthy choice?