Animals are generally fit

Nature produces almost always foods that provide only a single source of energy. It is either sugars (carbohydrate) based, or fats (lipid) based. Animals in general consume one main type of food based on seasonal availability. This is true even in the case of meat-eating animals since meat is mainly fats and protein but no carbohydrates. It is very possible that this factor of not mixing energy sources in the diet allows for a low BFP “Body Fat Percentage” which allows our distant cousins to remain fit. Which makes sense since being fit improves the chances of survival in a natural environment. This does not seem to apply to us human beings for some reasons…