New research published in the Journal of Nutrition shows that the bioactive ingredients in blueberries may help people fend off diabetes.
A study of people who were at risk for diabetes (obese and insulin-resistant but not yet diagnosed with diabetes) showed that consuming smoothies rich in blueberry bioactives twice per day for 6 weeks showed a 22% change in insulin sensitivity. This was the first study of its kind to indicate that the nutrients in blueberries can help regulate insulin levels in at-risk adults. It is believed that the flavonoids in blueberries – in particular anthocyanins and flavanols – are responsible for this positive effect.
Source: Nutraingredients
Blueberries are also great for the eyes as they are rich in antioxidants. Studies have linked blueberries and other antioxidants to the prevention of macular degeneration.