Hooray! It is great to hear an epidemiologist speak in defense of observational science. See: /theconversation.com/in-defence-of-observational-science-randomised-experiments-arent-the-only-way-to-the-truth-49807 This is particularly important where food is concerned as it is so difficult to reduce complex food issues down to a simple randomized controlled study. The effect of diet on hyperactivity is a very good example particularly as what looked simple proved to be a very complex … [Read more...]