Free faty acids are used by muscle as their primary fuel. Insulent blocksit can then go to the liver where they're made into ketone bodies. The reason keton bodies exist is to keep the brain holding on until the next meal arrives. Half of normal weight individuals in the united states have no metabolic flex i have. 88% of overweight individuals have no metabolic flexibility, and 99 % of obese individuals have no metabolism flexibility.
Steven Gundry, MD is a physician and author. He is a former cardiac surgeon and currently runs his own clinic, investigating the impact of diet on health.