In August 2019 researchers from China published their review of the medical scientific literature to assess the association between fruit and vegetable intake and lung cancer risk in individuals with different smoking status. A total of 9 studies were included in the review. Results showed that a higher dietary consumption of fruit was associated with a reduced lung cancer risk amongst current smokers and former smokers. The consumption of vegetables was also significantly associated with reduced risk of lung cancer for current smokers, but not for former smokers and never smokers. A further analysis revealed that each increase of 100 grams of fruit intake per day reduced the risk of lung cancer by 5% in current smokers, and by 4% in former smokers. In addition, each increase of 100 grams of vegetable intake per day reduced the risk of lung cancer by 3% in current smokers.
Wang C et al. The Associations of Fruit and Vegetable Intake with Lung Cancer Risk in Participants with Different Smoking Status: A Meta-Analysis of Prospective Cohort Studies. Nutrients. 2019 Aug 2;11(8). pii: E1791.