Why healthynomics?

I read an interesting book written by Steven D. Levitt and Stephen J.Dubner named Freakonomics recently. Economics is a science with excellent tools for gaining answers. But they go an extra mile. They come up with an idea that economics is not just about gaining answers. Asking what people want is for more important than explaining how people get what they want. In the book, the two talented men look through the world in a different way, and hit the hidden side of everything. That's their Freaknomics. Distinguished from their curiosity of everything, I am more interesting about asking and answers questions which will benefit our routine life, which can make us healthier. And these tools, I will call it ‘healthynomics’.