People With Diabetes Are Still Being Told to Avoid Fruit, and the Evidence Points the Other Way

Berries, apples, pears, citrus and stone fruit tend to sit lower for a given portion, because they carry more fibre and more water relative to their sugar. Very ripe bananas, mango and grapes sit higher, and ripeness matters within a single fruit: a spotted banana behaves quite differently from a slightly green one, as starch converts to sugar during ripening.

Dried fruit is the category that genuinely warrants care, and not because it is unhealthy. Removing the water concentrates everything, so a handful of raisins contains the sugar of a large bunch of grapes and does not fill you up in the same way. The fibre is still present, which helps, but portions creep easily.

What none of this justifies is a banned list. A fruit eaten in a sensible portion, with the rest of a meal rather than alone, is not the thing standing between anyone and good glycaemic control.

How much fruit is reasonable?

Two to three portions a day, spread out rather than eaten together, is a defensible position for most people with type 2 diabetes.

Three practical points make it work better.

1. Eat it with something else. Fruit with yoghurt, nuts or cheese produces a lower glucose response than fruit alone, because the protein and fat slow everything down.
2. Keep it whole. Not juiced, and preferably not blended into a smoothie, which mechanically does much of what juicing does even though the fibre technically remains.
3. Test your own response. Individual variation in post-meal glucose is genuinely large, and with continuous monitoring now recommended far more widely, it is increasingly possible to find out what a particular fruit does to you rather than to a population average.

Where the advice went wrong

Fruit became a target because it is visible, nameable, and easy to prohibit. Telling someone to stop eating apples is a concrete instruction that sounds like it is doing something.

Meanwhile the sweetened drinks, the refined flour, the fried snacks and the desserts that constitute most of the actual sugar load frequently go unmentioned, or are covered in a general sentence about moderation. Our piece on where the sugar in a typical day here really comes from makes that comparison directly.

Advice that bans the apple and ignores the karak is not cautious. It is aimed at the wrong thing, and it costs credibility that is needed for the restrictions that genuinely matter.