Healthy eating sounds like it’s a given that it’s good for you. Not always. Healthy eating can stimulate orthorexia nervosa. It’s the psychological term for an ‘unhealthy obsession’ with healthy eating. It literally means ‘ fixation on righteous eating’.

Those who write the ‘Bible’ of psychiatric disorders, DSM-5, don’t recognise orthorexia nervosa as a clinical diagnosis. However, doctors and dietitians say it’s not unusual. It also appears to be more prevalent among vegetarians and vegans.  At heart, it’s about a fixation on food quality and purity. 

Australian cardiologist Dr Ross Walker has a medical practice in Lindfield, on the upper north shore of Sydney.  One of his areas of expertise is preventative cardiology. Walker has published seven best-selling books on preventative cardiology. He also lectures nationally and internationally on the topic.  Here’s what he says about whether healthy eating is really always good for you – Marika Sboros