So far every responder to the original post is completely oblivious to the problem. Healthy lifestyle has always been job of the mothers, it takes a lot of education, and a lot of time and effort. All this gets much more difficult with every additional child. In the last generation the traditional tafkid of women both in Judaism and in scosiety at large has been canceled. But in frum world situation is worse. When you go into regular supermarket there are usually worse and better food choices. Kosher supermarkets are only now slowly starting to carry some at least healthier sounding products.