Margot Robbie's Nutritionist on the #1 Thing People Get Wrong About Weight Loss

If there was an agreed-upon formula for weight loss, it would be to consume fewer calories than you burn. But as , Columbia-educated functional nutritionist, food coach, and nutritional therapist, writes for , it's a bit more complicated than that. In fact, James believes that's what most people get wrong about weight loss; far more factors influence your body's ability to maintain a healthy weight than simply eating right and working out.

"Weight loss is complex. It's not just food and exercise. The presiding equation of 'calories in, calories out' is woefully inadequate," writes James, whose former client was Margot Robbie. "Other factors, such as hormones, sleep, inflammation, the gut microbiome, medication, unexpressed emotions, and genes all influence your ability to lose weight and keep it off."