
A column argues most dietary guidance is based on weak, inconsistent evidence and changes often, leaving people confused about what to eat. It offers three practical principles readers can rely on amid shifting studies and stresses that better clinician training in nutrition is important so doctors can interpret imperfect science. That argument is illustrated by a recent widely criticized paper claiming fruits and vegetables cause cancer despite a tiny sample size and no control group, showing how poor study design can produce misleading headlines.
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