Observational Studies Can Point the Way, but Only Clinical Trials Can Prove Causality
New observational data by Wang et al.1 highlight the health benefits of fruits and vegetables. These foods are known for being sources of vitamins and minerals and for their phytochemical content.2 Soybeans are also known for their high phytochemical content, especially that of isoflavones.3 But the question of whether fruits and vegetables are protective in […]