Reducing childhood obesity through policy change: acting now to prevent obesity.

Childhood obesity is epidemic in the United States, and is expected to increase the rates of many chronic diseases. Increasing physical activity and improving nutrition are keys to obesity prevention and control. But changing individual behavior is difficult. A comprehensive, coordinated strategy is needed. Policy interventions that make healthy dietary and activity choices easier are likely to achieve the greatest benefits. There is emerging evidence on how to address childhood obesity, but we must take action now to begin to reverse the epidemic.