Some say that the 10,000 step per day guideline is a myth, because it was built on bad science. But, as far as we know, it was built on no science — likely originating with a Japanese marketing slogan for a pedometer in the 1960s, literally translated as ’10,000 steps meter’. More slogan than science — at first. Following a cohort of over 2,000 free-living adults in Australia between 2000 and 2005, researchers discovered that increasing...

The ‘blood-type’ diet is based on a popular book published in 1996, which has since sold over 7 million copies.2,3 The idea is that our blood group reveals something about our ancestral dietary habits, and matching our current eating to those habits help reduce disease risk. Those with blood group O, the hunter, are advised to eat a high-animal protein diet, blood type A, the agrarian, a mostly vegetarian diet, type B, the nomad, should eat...