A study by I. Muraki (et al.), “Fruit consumption and Risk of Type 2 Diabetes: Result from Three Prospective Longitudinal Cohort Studies,” British Medical Journal, vol. 347, 2013, examined the fruit consumption of 12,198 participants who had type 2 diabetes. The researchers examined the consumption of fruit juice versus the consumption of the raw fruit.
It was found that those who consumed one or more servings of fruit juice per day, increased their risk of developing type 2 diabetes by up to 21 percent.
However, the consumption of whole fruit – particularly apples and blueberries – resulted in a 7 percent reduction in type 2 diabetes risk.
It is thought that the high sugar content of fruit juice, and the high glycaemic index (the measure of how fast carbohydrates raise blood sugar levels), was the problem with fruit juice, even though such juices may have high anti-oxidant capacities. I would speculate that the same result would hold for wine as well, which wine drinkers deceptively like to promote on grounds of anti-oxidant qualities, rather than honestly saying that they like the grog!
James Reed, pay attention.