" Looking at obesity without preconceived ideas,” she wrote, “one would assume that the main trend of research should be directed toward an examination of abnormalities of the fat metabolism, since by definition excessive accumulation of fat is the underlying abnormality. It so happens that this is the area in which the least work has been done.” She added, “As long as it was not known how the body builds up and breaks down its fat deposit, the ignorance was glossed over by simply stating that food taken in excess of body needs was stored and deposited in the fat cells, the way potatoes are put into a bag. Obviously, this is not so. "

― Gary Taubes , The Case for Keto: Rethinking Weight Control and the Science and Practice of Low-Carb/High-Fat Eating