Dr Crystal said it’s recommended that UK adults have no more than 30 grams of free sugars every day – “around 7 sugar cubes, so it’s not much”.
The glycaemic index (GI) is a rating system for foods containing carbohydrates. It shows how quickly each food affects your blood sugar (glucose) level when that food is eaten on its own.
Some low GI foods, such as wholegrain foods, fruit, vegetables, beans and lentils, are foods we should eat as part of a healthy, balanced diet.
However, “using the glycaemic index to decide whether foods or combinations of foods are healthy can be misleading”, says the NHS.