Nutritional Value of Purple Grapes

by Danielle C. Tworek

About Danielle C. Tworek

Based in Florida, Danielle C. Tworek covers health news and medical topics for various online publications. She is a certified personal trainer with the National Academy of Sports Medicine, as well as a Schwinn indoor cycling instructor. Tworek holds a Bachelor of Science in human nutrition.


Purple grapes do more than simply add a few extra nutrients to your daily intake. This age-old fruit is as mysterious as it is delicious, offering health benefits that everyone should take seriously. Learning the nutritional value of purple grapes will do more than improve your diet -- it just might extend your life.


Seedless purple grapes provide 110 calories per 1-cup serving, as well as 0.3 grams of fat, 29 grams of carbohydrates and 1.2 grams of protein. The total carb content includes 1.4 grams of dietary fiber and 24.8 grams of sugar. Although no nutritional authority has established recommended intakes for sugar in the diet, choosing a cup of grapes over candy to curb a sweet tooth is a nutritionally valuable decision. You consume more calories and get little to no nutritional value in candy.


One cup of purple grapes contains 9 milligrams of phosphorus and less than 1 milligram of vitamin C and thiamine. Purple grapes are also a source of calcium, providing 13 milligrams per cup. You do not have to fret over the salt content when snacking on purple grapes, as 1 cup contains a mere 2 milligrams of sodium.


Resveratrol, which is found in high concentrations in red wine, is also in fresh purple grapes. Resveratrol in grapes, according to a 2009 study in the "Journal of Cardiovascular Pharmacology," has been linked to heart health. Harvard Medical News also has investigated the possibility that resveratrol in grapes is associated with an increased lifespan, although this theory has yet to be tested on human subjects.


Grapes have been cultivated since at least 1,000 B.C., but firm documentation of purple grapes' existence begins in 1854, when this variety emerged in Massachusetts. Currently, 336,000 tons are grown and harvested in the United States each year. Grapes are used in a variety of foods, such as jelly, juice and wine, giving consumers a variety of options and opportunities to benefit from its nutrients.

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