Quoted: Barnard supports his ideas with studies, but be mindful of the kind of studies he examined, says Sanjay Asthana, director of the Alzheimer?s disease research center at the University of Wisconsin-Madison. Most are epidemiological studies based on what people say they eat and on how their health changes over a period of years. The gold standard for research is a randomized controlled trial, in which participants would be put on different diets and their health monitored.
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