I'm absolutely dying, because I really think it would be a huge error to do one over the other. I'd urge you to go to the Annapolis Valley example, because in fact they had both a food nutrition policy, a comprehensive school health initiative, and rigorous evaluation. Those schools that were participating in this comprehensive health program were less than half as likely to have children who were overweight and obese; the students ate more fruits and vegetables and had a higher overall diet quality than students without the program, and it was the comprehensive health nature of the program.
On September 21st, 2006. See this statement in context.