The consumption of whole fruit can reduce the risk of type 2 diabetes, while drinking fruit juices can have the opposing effect a recent US study has suggested.1
Researchers from the Harvard School of Public Health examined detailed information stretching as far back as 1976 in their investigation.
The examination of three separate studies assessed patient lifestyle, diet and general health at the start of each study, and then used questionnaires every two years to follow up patient progress. More than three million follow-up years of information were gathered along the way.
Researchers revealed that people who regularly consumed fruits such as blackberries, grapes and apples reduced their chances of developing type 2 diabetes by 2%, although some fruits had no effect at all. They also revealed that those who drank three glasses of fruit juice a week increased their diabetes risk by 8%.
The findings support the importance of the fibre found in whole fruit (rather than fruit juice) in improving our blood sugar regulation and subsequent risk of developing type 2 diabetes.
1. Muraki I, Imamura F, Manson J, et al. Fruit consumption and risk of type 2 diabetes: results from three prospective longitudinal cohort studies. BMJ. Published online August 29 2013