In any condition, normal, pre diabetes or having diabetes blood glucose levels will increase after taking food. The amount of glucose expression depends on two factors. One is the body’s ability to metabolise, so the form we take it; whether it is a solid or liquid form. Second is whether it contains simple sugars or it contains complex sugars, fats and proteins. If it contains simple sugars the blood glucose levels after 30 minutes can range from 100 to 200 or sometimes up to 250. If we take foods that is rich in complex carbohydrate, fibre content and fat then the glucose expression is not very high. It may just reach around 100 to 140 or 160. So if you take a fruit juice or simple sugar drink or eat foods like white rice or potato then the sugar levels will surely go high. This is because the body metabolise the complex sugars in a slow way. If you take solid foods the glucose expression will be a little late compared to the liquid item. So glucose levels can vary depending upon the type of food and the form in which we take the food.