In January this year, JAMA Internal Medicine published my Viewpoint on corporate funding of nutrition research: science or marketing. Richard Kahn, former chief scientist and medical officer of the American Diabetes Association, wrote a letter in reply (see below for more about him**).  The journal published his letter, along with my response, in its current issue.  Here’s what I said. In Reply Dr Kahn requests evidence that nutrition research funded by food companies is of lesser quality than studies funded by independent agencies or performed by investigators with nonfinancial conflicts of interest. Concerns about such issues are relatively recent; few published studies address them directly. Instead, concerns about industry sponsorship of nutrition research derive from comparisons with the results of studies of funding by tobacco, chemical…