Which of the following foods is considered high GI?

Wholemeal bread is considered high on the glycemic index (GI) compared to the other options provided. The glycemic index is a ranking of carbohydrates in foods based on how they affect blood glucose levels. Foods that are high GI cause a rapid increase in blood sugar levels.

Wholemeal bread is made from whole grains that, while healthier than refined bread, can still lead to a significant rise in blood glucose due to their carbohydrate content. It tends to have a higher GI because of the way the carbohydrates are digested and absorbed in the body, leading to an increase in blood glucose levels.

In contrast, yogurt, barley, and milk generally have lower GI values. Yogurt typically contains proteins and fats that slow down the absorption of sugar, while barley is a whole grain rich in fiber, which also helps to lower its GI. Milk contains lactose, which has a lower GI than many other carbohydrates, making it less impactful on blood sugar levels compared to wholemeal bread. Thus, wholemeal bread stands out as the high GI food among the options provided.