Are There any Adverse Effects Of Eating Too Many Grapes?

Updated on May 14th, 2020
What happens when you eat too many grapes

Grapes are amazingly great for you, giving you a variety of multiple minerals, vitamins, and even fiber. It is possible, however, to eat plenty of grapes. Always pre-portion your grapes, instead of nibbling straight out of the pack. Otherwise, you might experience adverse side effects. If you’re allergic to grapes, you may even have problems by merely coming into contact with them.

Weight Gain

Sure, grapes are comparatively low in calories. One big cup, which is around 30 grapes, has less than 105 calories. The issue is, however, that grapes are effortless to pop in your mouth. If you sit down with a pack of grapes and switch on the TV — before you know it — you could end up eating most of the pack.

Suddenly, your 105-calorie snack triples or doubles in calories, eventually giving you the same number of calories you’d get from a complete meal. If you eat large portions of grapes regularly without first measuring your portion size, the additional calories could cause you to gain weight.

What Happens If You Eat Too Many Grapes

You need carbohydrates in your diet. They convert to your body’s primary source of energy — glucose. Carbs must constitute 45 to 65 percent of all the calories you eat, according to the Dietary Guidelines for Americans. That’s 225 to 325 grams daily or 900 to 1,300 calories from carbs, based on a 2,000-calorie diet.

That one-cup serving of grapes has more than 27 grams of carbs. If you’re snacking on grapes without restraint and not paying attention to your portion size, you may quickly consume more than your daily carb requirement. You’ll also throw off your equilibrium of macronutrients, meaning that if your carb intake is heavy, your fat and protein intake can be lacking.

Are Grapes a Laxative

You’ll get the right dose of fiber from grapes — around 1.5 grams from one cup. That’s possibly not sufficient to cause any disturbance in your gut. If you snack on a large number of grapes, however, you improve your fiber intake. If you don’t frequently consume a lot of fiber, you could observe an uncomfortable rumbling in your tummy after devouring a fiber-rich, large quantity of grapes.

Because your body is not used to the fiber, it becomes challenging to pass stools, which is a symptom of constipation. Sometimes, extra fiber has an adverse effect; however, leaving you with diarrhea, as your system tries to flush out the additional fiber.

Allergy Attack

It’s uncommon to have a grape allergy, although it can occur. If you’re allergic to grapes, you may get red patches or hives on your skin shortly after eating grapes or by touching them. In extreme cases, you might go into anaphylactic shock or have difficulty breathing.

Just because you are allergic to the reaction of grapes, however, doesn’t necessarily mean that you’re allergic to the fruit itself. You may actually be allergic to the yeast or mold that grows on the grapes or to the pesticide on the grapes. The only way to be sure what you’re reactive to is to undergo allergen testing from your doctor’s office or via a referral to a testing center.

Do Grapes Have a Lot of Sugar

grapesConsuming grapes may help lower your risk for diabetes, high triglycerides, heart disease, high blood pressure,  and metabolic syndrome, according to studies at the University of Michigan. This makes grapes a healthy choice for one of the two recommended servings of fruits each day. Consuming a one-cup serving of grapes is not likely to cause a large spike in blood sugar, but like many fruits, grapes contain carbohydrates and can raise blood sugar.

How Much Sugar Do Grapes Have

One carbohydrate serving for people with diabetes must contain 15 grams of carbohydrate. A one-cup serving of grapes contains 16 grams of carbohydrate, of which 15 grams are sugars, and 1 gram is fiber. Since fiber doesn’t increase blood sugar levels and is not digested, it is often subtracted from the carbohydrate content when counting carbs, so one cup is a suitable portion for grapes.

Sugar in Grapes

The GI (glycemic index) is a measurement that classifies foods having carbs based on how much they have the potential to increase your blood sugar. Foods with a glycemic index of 55 or lower are considered low on the GI (glycemic index), so they normally don’t cause significant blood sugar spikes when taken in moderation. Grapes have a glycemic index of 46, making them a low-glycemic index food.


Grapes contain high amounts of potent antioxidant compounds that may not only shield you against diabetes but may fight diabetes complications on your cardiovascular system, the journal PLOS Medicine stated in its April 2017 edition. Diets rich in fresh fruits, such as grapes, are related to a significantly lower risk of type 2 diabetes, according to the research. In people with diabetes, eating a plentiful amount of fruits like grapes reduces the chances of dying of heart disease, the report concludes. So whether you are a diabetic or not, eating plenty of fresh fruit guards against chronic disease.

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