Dr. Ian Smith has a new book all about the Met-Flex Diet. Metabolic Flexibility is a key component of weight loss at any age. Dr. Ian Smith has a new diet that he calls The Met-Flex Diet that is aiming to aid Metabolic Flexibility. Dr. Ian believes, and has research to back up his claim, that Metabolic Inflexibility is why so many people struggle to lose weight. If you could get your metabolism working, losing weight gets a little easier. However, if you have developed inflexibility in your metabolism, you will struggle to lose weight. A diet that aims to fire up your metabolism, moving it from inflexible to flexible, is at the heart of the Met-Flex Diet. Dr. Ian Smith was our guest on Wake Up Tri-Counties on Friday.