Diets are nothing new. They’ve been around since Roman times, although it seems the Victorians are to blame for our obsession with the faddy ones. Slimming advice in those times included sprinkling your body with hot sand and eating
You don’t have to go far today to bump into people with food allergies. I know three people with Coeliacs disease and another four who are wheat intolerant, and these are just the tip of the iceberg.