Americans are sugar addicts and starch lovers, so in this country, over 99% of the people you see walking the streets are “sugar burners.” This means their metabolism and physiology runs on sugar as the primary fuel source. Less than 1% of us are what is referred to as “fat adapted,” which means fat is their primary fuel source.
Fuel source is never exclusive though, because the human body will always burn a combination of fat and sugar, regardless of the primary fuel source preference, but the emphasis can certainly change drastically from person-to-person, based on the food they eat first, the type of exercise/activity they get second, and genetics third (and that’s a very distant third).
When someone has successfully made the transition to becoming “fat adapted,” they have reached the point in their diet