There's a mountain of myths and assumptions about what makes us fat. One researcher is interested in understanding where these ideas come from and why scientists continue to recycle them. In a new study, he homes in on the presumption that skipping breakfast has a direct effect on obesity.

At first the pounds melt off and then, nothing. But diet plateaus are a normal part of the body's adjusting to a lower weight. Weight loss experts say trying a variety of tactics can help move beyond the diet plateau. For most people exercise works best.

Federal officials say obesity rates among low-income preschoolers are declining in 19 states and U.S. territories. Rates are flat in 20 more states. The findings are cause for optimism, the officials say.