Are conflicts of interest in medicine out of control and undermining public trust, or an over-hyped concern? Dr Mark Porter investigates the hidden influences affecting your health.

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?

Switzerland looks set to be the first country in Europe to halt routine breast screening; yet in the UK a review of the same evidence came to the opposite conclusion. Dr Mark Porter asks how two groups of experts can arrive at such different decisions, and examines the harms and benefits of screening for breast cancer.

Public Health authorities have written to doctors in the UK to ask them to look out for cases of Ebola following the recent outbreak in West Africa which has killed nearly 500 people. Dr Mark Porter talks to David Heymann, professor of infectious disease epidemiology at the London School of Hygiene and Tropical Medicine about the risks of Ebola cases coming to the UK. He is joined by Dr Margaret McCartney to discuss why some types of bike saddles can cause erectile dysfunction. He also talks to Glyn Elwyn about the pros and cons of recording consultations with your doctor Also, insect bites, why do some people get bitten more than others, what's the best repellent and what's the best treatment if you do get bitten?

Dr Mark Porter returns with a new series to address confusion about statins for healthy people rather than patients. Statins have hit the headlines as doctors debate the draft recommendation from NICE to lower the threshold for offering statins, which could mean millions more will be taking them.And Mark Porter turns patient when he is investigated for persistent heartburn. Plus should GPs who miss cancers be named and shamed and why drugs can't be recycled.

Headlines this week claim that 'thousands of patients die in hospital of thirst' but did the authors of the study actually analyse hydration?Mark Porter investigates the evidence for using Baclofen to treat alcoholism and hears how it helped a listener to stop drinking 6-8 bottles of wine a day.Why did NICE question the use of Paracetamol - the UK's favourite painkiller - in the treatment of osteoarthritis?And are saturated fats really bad for us?

Dr Mark Porter investigates the dramatic increase in testosterone prescribing; low fibre diets - why the traditional advice to eat high fibre is not always recommended. And having a consultation with your GP via a video service such as Skype from your computer - is there any evidence to back up the government's latest answer to increasing access to your doctor.

Tamiflu - the controversial drug - has been stockpiled by the government for use in a flu pandemic and endorsed by regulatory bodies including the WHO. With a new review of the evidence due this week, Inside Health's Margaret McCartney and James Cave, Editor of the Drug and Therapeutics Bulletin have been following the story. Mark Porter gets his body fat checked and finds out how much is hiding inside. And how should doctors raise concerns about a person's weight? Plus, why you might want to think twice before paying for a total body scan.