Why is nutrition so hard to study?

Is dairy good or bad for health? Is cholesterol evil? Does red meat kill or cure? Is the ketogenic diet a godsend or a health hazard? Can the vegan, vegetarian, pescatarian,...

Is cancer overdiagnosis a problem?

Is it possible to overdiagnose one of the world’s leading causes of mortality? A new study from Australia suggests that this might be the case. It is well established that...