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Complementary Medicine




What is the amount of potassium in a grapefruit and other ingredients?


Grapefruit juice (100% grapefruit juice without added sugar) contains a variety of nutrients.  Specifically, one cup (8 ounces) of grapefruit juice contains about 90 calories, 22 grams of carbohydrate (most of that being natural sugars), 1 gram of protein, 300 mg of potassium, 100% of the Daily Value for vitamin C, and lower percentages (less than 10%) of the Daily Value for thiamin, niacin, folate, vitamin B6, calcium, and magnesium.  Red and pink grapefruit juice also contains vitamin A.

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Response by:

Bonnie J Brehm, PhD, RD Bonnie J Brehm, PhD, RD
Professor of Nursing
College of Nursing
University of Cincinnati