To the Editor Dr Parsons and colleagues conducted a phase 3 nutrition intervention trial among 443 men with prostate cancer.1 The intervention group was encouraged to consume at least 7 servings of vegetables and fruits daily, including at least 2 servings each of tomatoes and cruciferous vegetables.
At baseline, there were no significant differences between the groups (including body mass index and log-transformed carotenoid values). At 12 months and 24 months, there were no significant differences between the 2 groups in the defined outcomes. However, there are several issues.
Kerley CP. Vegetable Consumption and Progression of Prostate Cancer. JAMA. 2020;323(24):2528–2529. doi:10.1001/jama.2020.6726
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