An honourable 50th position for the NHS’s own myth buster - The Guardian columnist and author of Bad Science Dr Ben Goldacre.

He has probably offended every vested interest under the sun from the pharmaceutical industry to complementary therapists - once obtaining a certificate from a professional nutritionists’ association for his dead cat to prove a point. But his dry wit in tackling subjects like MMR immunisation gets the message across. Behind the joking is a sharp brain and a fervent belief that scientific inaccuracy and health scares should be challenged.