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From TFA:

  “There are many studies trying to decipher the link between diet and human health, and it’s very difficult to understand the underlying mechanisms because of the wide variety of foods people eat. But if we focus on just the nutrients and metabolites derived from food, we begin to see how they influence physiology and pathology,” said Jing Chen, PhD, the Janet Davison Rowley Distinguished Service Professor of Medicine at UChicago and one of the senior authors of the new study.