One of many insightful responses from Bruce Bradley:
I think one of the main ways the processed food industry is trying to grow and defend their business is by funding self-serving research. The goal of these studies isn’t to uncover “the truth” or to improve public health. Instead, the research is carefully constructed to create sound bites and statistics to help market their products or combat potential regulation. This is one of the primary ways we end up with conflicting studies that confuse consumers on what they should eat or drink.
Bradley’s final answer is remarkably perceptive. Link.