The glycemic index is a measure of how fast a food raises your blood sugar. The higher the glycemic index, the more quickly a food will raise your blood sugar.

Fruits and vegetables typically have low glycemic indexes, which makes them ideal for people with diabetes or pre-diabetes. However, some fruits and vegetables have high glycemic indices and should be avoided in order to prevent spikes in blood sugar levels.
The following fruits have high glycemic indices:
Apples
Oranges
Bananas
Grapes
The glycemic index (GI) is a measure of how much a food raises blood sugar levels. It’s measured on a scale of 0 to 100, with pure glucose serving as the baseline. High GI foods are those with a value of 70 or more; low GI foods have values below 55.
Fruits and vegetables are generally low in glycemic index. Examples include apples, plums, pears, oranges, grapefruit and other citrus fruits, tomatoes and cucumbers.
Some fruits have high glycemic indices due to their high sugar content. These include grapes, bananas and raisins.

Glycemic index (GI) is a measure of how quickly a carbohydrate-containing food raises blood sugar.
What does that mean for you? Well, if you’re trying to lose weight or maintain a healthy weight, knowing the GI of your favorite fruits and vegetables can help you make the best possible choices for your diet. A food’s glycemic index is listed on its nutrition facts label, along with information on its total carbohydrates and fiber content.
If you’re looking for fruits with low glycemic index scores, apples are an excellent choice. They have one of the lowest scores of all fruits at 38. Oranges have a score of 58 and grapes rank at 50.
Fruits, like all foods, have a glycemic index. The GI is a measure of how quickly a food raises your blood sugar level. The faster your blood sugar rises, the more insulin you need to get rid of it—and the more harmful effects your body may experience from that spike.
Many fruits are high in glycemic index due to their natural sugar content. In general, most people should try to avoid eating fruits with a GI rating above 30.
If you’re looking for a way to keep your blood sugar under control, eating fruits and veggies with a low glycemic index is a great place to start.

But what exactly is a glycemic index? It’s a ranking of foods based on how they impact your blood sugar levels after you eat them. Foods with a higher glycemic index tend to cause more rapid increases in blood glucose—that’s what we want to avoid, because it can lead to weight gain and diabetes. If you’re trying to lose weight, keep your blood sugar under control, or prevent diabetes, it’s important to know which fruits have high glycemic indexes and which ones are relatively low.
The table below shows the glycemic index for some common fruits:
Fruit Glycemic Index (GI)
Apple 38
Banana 51
Blueberries 10-30*
Cherries 15-30*
Grapes 39-61*
Oranges 30-59**

It’s true that some fruits have a high glycemic index, but they’re not all bad.
If you’re watching your blood sugar levels, you may want to avoid certain fruits and vegetables. But don’t throw out the baby with the bathwater! There are plenty of low-glycemic-index options available to you.
Still wondering which foods have the highest glycemic index? Check out this list of high-glycemic fruits and vegetables:
Fruit has a high glycemic index, but it is not as high as some other foods.
Fruit is one of the healthiest things you can eat, but it is important to be aware of how it affects your blood sugar.
The glycemic index of fruit varies depending on the type, but most fruits have a low glycemic index. The glycemic index of fruit is lower than that of most starchy foods such as potatoes and grains.
The glycemic index ranks carbohydrates on a scale from 1 to 100 based on how quickly they are converted into glucose in the body after being eaten. Foods with a higher glycemic index raise blood sugar more rapidly than those with a low glycemic index

Certain fruits have higher GI values than others, but all fruits have less impact on blood sugar levels than starchy foods like potatoes and grains do.
The glycemic index (GI) of a food is a measure of how quickly it raises blood sugar levels. It’s calculated by comparing the effect of consuming 50 grams of a particular food to the effect of consuming 50 grams of pure glucose. The higher the GI, the more quickly a food will raise blood sugar levels.
Fruits with high glycemic indexes include:
Apples (50)
Oranges (49)
Bananas (48)
Grapes (48)
Strawberries (41-42)
Fruits are a great way to get the vitamins and nutrients your body needs. They’re also good for you because they have a low glycemic index, making them good for diabetics.
There are two ways to determine the glycemic index of a food:

-The glycemic index is measured by how much blood sugar increases after consuming it. The higher the blood sugar increase, the higher the glycemic index number.
-The glycemic load is determined by taking into account both the amount of carbohydrates in a serving of food as well as its glycemic index number (i.e., if you eat 10 grams of carbohydrates with a high glycemic index, that would have less of an effect on your blood sugar than eating 20 grams of carbohydrates with a low glycemic index).
The glycemic index (GI) is a rating of how much a certain food raises your blood sugar. The higher the GI, the more quickly your blood sugar will rise after eating that food.
Glycemic index is calculated by comparing how much your blood sugar rises after eating 50 grams of carbohydrate from a particular food to how much it rises after eating an equal amount of carbohydrate from a standard food, usually glucose or white bread.
The higher the glycemic index, the quicker your blood sugar will rise.