Gene Eating is one of the clearest attempts I have come across to explain complicated science. It is an entertaining read, full of lively anecdotes and self-deprecating humour. When Yeo makes a documentary about “clean eating”, to look at how the half-truths of the “old white dudes” are being echoed and amplified by young, beautiful “lifestyle gurus” and social-media influencers, he joins Instagram and starts posting pictures of his food. A small war breaks out when, one day, his breakfast photo includes a sausage. After #sausagegate, he loses more than 10% of his followers. Yes, it’s a tough old world.