The Obesity Pandemic, Root causes: Calories In/Calories Out or Hormones…. What’s the Evidence?

Graham Philips is "the pharmacist who gave up drugs" and is passionate about optimising population and metabolic health, reducing obesity and the positive knock on effects that this has in reducing morbidity, reducing medication load, improving mental health and so much more. "What’s the root cause of the obesity/diabetes pandemic?" If we are putting weight on, we are storing more calories than we are burning. What is the answer - is “eat less/move more” an oversimplistic view? Do other factors, like the type (rather than number) of calories and the impact of food on the insulin/glucagon and leptin/ghrelin axes play the largest part in the development of metabolic syndrome?