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Comment & Response
June 23/30, 2020

Vegetable Consumption and Progression of Prostate Cancer

Author Affiliations
  • 1Plant Based and Sustainability Group of the Irish Nutrition and Dietetics Institute, Dublin, Ireland
JAMA. 2020;323(24):2528-2529. doi:10.1001/jama.2020.6726

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.