Apologies if someone's already posted this (please feel free to remove). This is a big study and it's probably confirming what a lot of you already practice. From the CSIRO site. From the BMJ.
I think it's a good study though because it involves so many people and is relatively long term. Some of them are like "We got half a dozen people to eat toffee for two days..." and you just think, what's the point of that and what a waste of funding.