Tuesday , October 24 2017
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All Fruits Not Created Equal

Blueberries, grapes, and apples may show benefit in type 2 diabetes…. 

A recent study used data from women enrolled in the Nurses’ Health Study (N=66,105), Nurses’ Health Study II (N=85,104) and men from the Health Professionals Follow-up Study (N=36,173). All study participants were healthy and free of chronic disease at the start of the respective studies. Researchers examined which participants developed type 2 diabetes and what fruits they consumed. A total of 12,198 study participants developed type 2 diabetes. Data analyses were adjusted for confounding factors such as lifestyle and pooled hazard ratios were generated for both fruit consumption in general, and for various types of individual fruits.

Overall fruit consumption was found to be associated with a slightly lower risk of type 2 diabetes, with a hazard ratio of type 2 diabetes of 0.98 for every three servings per week of fruit.

However, increased consumption of whole fruits including blueberries, grapes and apples was significantly associated with a lower risk of type 2 diabetes. Consumption of fruit juice, as well as oranges, strawberries, and cantaloupe, was associated with a higher risk of type 2 diabetes.

Practice Pearls:
  • Fruits vary in type 2 diabetes risk.
  • Consumption of whole fruits including blueberries, grapes and apples, was significantly associated with a lower risk of type 2 diabetes.
  • Fruit juice consumption was associated with a higher risk of type 2 diabetes. 

[Muraki et al. Fruit consumption and risk of type 2 diabetes: results from three prospective longitudinal cohort studies. BMJ. Aug 28;347:f5001. doi: 10.1136/bmj.f5001]