An experimental pathologist and molecular geneticist, Philip Wood uses gene-knockout technology to study the way mouse genes regulate the metabolism of fat--research that provides insights into the workings of fatty-acid metabolism in humans and what can happen when that metabolic balance goes awry. Based on the classes he regularly teaches to first- and second-year medical students, Wood's book reviews the individual and public health burden of obesity and clarifies often-used, but often inadequately explained, terms employed in the continuing cultural and scientific debate about excess fat....