Surprising Side Effects of Eating Grapes, Say Dietitians — Eat This Not That

Do you know that grapes are one of the standard fruits in America, proper after strawberries and bananas? It is not all that stunning, both. Grapes style as candy as sweet, make a handy transportable snack since you do not want utensils, and are simply plain enjoyable to eat. To not point out, they’re full of a variety of useful vitamins, so you possibly can typically be ok with consuming them.

Based on Shirlene Reid, RD, MA, grapes—like some other fruit—are wholesome, so long as they’re consumed sparsely. The one factor you really want to be careful for is the excessive sugar content material, says Reid, which may add up rapidly in case you’re devouring them by giant handfuls. Needless to say one serving is 1/2 cup (or about 16 grapes). You would possibly even wish to portion out that serving measurement in a plastic bag so you do not get carried away.

However have you ever ever puzzled how consuming grapes would possibly have an effect on your physique? Consultants say there are each execs and cons to consuming them. Listed here are just a few widespread unwanted effects to pay attention to.

RELATED: The #1 Greatest Juice to Drink Each Day, Says Science


Seeking to maintain your mind in tip-top situation as you age? Then contemplate packing some grapes in your work lunch bag.

“Grapes enhance reminiscence and focus,” says Danielle McAvoy, RD with Sturdy Residence Gymnasium. “The antioxidant compounds in grapes assist decrease oxidative stress within the mind. This protects your mind from cognitive decline and reminiscence loss as you age.”

Melissa Mitri, RD with Zenmaster Wellness, notes that grapes may enhance blood movement to the mind, thus bettering your each day focus.

Research have proven that resveratrol, a selected antioxidant discovered primarily within the pores and skin of grapes, helps scale back your threat of Alzheimer’s by reducing irritation within the mind and in addition eliminating the amyloid-beta peptide, which has been linked to the development of this illness full when it accumulates.


Persistent irritation has been linked to most cancers, coronary heart illness, bronchial asthma, sort 2 diabetes, and rheumatoid arthritis, amongst different circumstances. Luckily, grapes are brimming with antioxidants like vitamin C, vitamin Okay, polyphenols, catechins, and anthocyanins—all of which may also help scale back irritation, says Jesse Feder, RD and private coach with Energy Warehouse.

“Moreover, grapes—particularly crimson ones—are identified to be wealthy in resveratrol,” provides Feder. “Analysis has proven this compound to guard in opposition to oxidative stress and irritation.”

Particularly, resveratrol offers a protecting lining for blood vessels to forestall harm, thereby keeping off coronary heart irritation.

woman picking grapes

When hypertension is left unchecked, it could possibly improve your threat for the 2 main causes of dying in Amercia: coronary heart illness and stroke. However the excellent news is there are many simple methods to deal with and stop hypertension. For one, McAvoy and Mitri counsel snacking on some grapes, which may also help steadiness blood stress as a result of they’re excessive in potassium and low in sodium.

A 2016 research in Vitamins steered that potassium helps decrease blood stress by serving to to dilate veins and arteries whereas additionally flushing out extra sodium.


Grapes are a terrific night snack as a result of they may also help you drift off and catch some high quality Zs, says McAvoy. Why? This fruit accommodates a small quantity of melatonin, the hormone that helps regulates your physique’s sleep-wake cycle.

Attempt consuming grapes an hour or two earlier than bedtime—and bear in mind, be aware of your portion measurement otherwise you would possibly unintentionally overload on sugar, which may intervene with the standard of your sleep.

red and green grapes

In the event you’ve ever misplaced observe of what number of grapes you have eaten—which, let’s face it, is all too simple to do—you’ll have skilled a tummy ache. Based on Reid, this often occurs due to the excessive quantities of fructose in grapes (about 12.4 grams per cup, in comparison with about 3 grams in a cup of raspberries)

“Fructose is a pure sugar present in fruits that may trigger gasoline when consumed in excessive quantities,” says Reid. “So, while you eat too many, chances are you’ll get a stomachache as a result of gasoline. Tannins in grapes may additionally play a job in an upset abdomen: these naturally occurring polyphenols, that are discovered within the pores and skin and seeds, may cause nausea and diarrhea if eaten in excessive quantities.”

Mitri provides that some people who find themselves significantly delicate to those compounds in grapes might expertise bloating, constipation, or diarrhea after consuming too many.

merlot grapes

Sara Chatfield, RDN at Well being Canal, calls grapes one in all her go-to snacks. That is partly as a result of this fruit is loaded with vitamin C, beta carotene, quercetin, and different antioxidants identified to advertise immune well being.

The stronger your immune system, the higher ready your physique is to struggle off diseases. How’s that for a purpose to nosh on some grapes?

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