( CNN) Commonly, science advances by trial and error. When an experiment fails, researchers question premises, formulate new ideas and then design better examines. But the field of nutrition is having a hard time of this when it comes to the low-fat diet debacle.
As noted in the Journal of the American Medical Association
, conventional wisdom used to be that cutting back on fat would build us lean and healthy. However, things have not quite worked out that route, and Americans are struggling to adjust to a new dietary reality.