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Grapefruit, a citrus fruit, provides a low-calorie snack when you're watching your weight, and its tangy taste makes it a favorite for fruit lovers. This fruit comes in white or pink varieties.
One serving of Half Grapefruit is reported to have 52 Calories, according to the nutrition facts provided by livestrong.com.
One-half of a large grapefruit contains 53 calories, according to the U.S. Department of Agriculture National Nutrient Database. The U.S. Food and Drug Administration notes that the average diet is based on 2,000 calories per day and warns that eating too many calories may lead to obesity.
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Half of a large grapefruit contains 57.1 mg of vitamin C, a nutrient that plays a critical role in forming collagen and repairing your body's tissues, according to MedlinePlus 1. This serving also provides 17 mcg of folate, 916 mcg of beta-carotene, 1,539 IU of vitamin A and 1,884 mcg of lycopene, according to the USDA database.
Grapefruit is a rich source of potassium and calcium. The National Nutrient Database reports that half of a grapefruit contains 20 mg of calcium and 231 mg of potassium. It also contains smaller amounts of iron, magnesium, phosphorus and fluoride.
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- MedlinePlus: Vitamin C
- Grapefruit, raw, pink and red, all areas. USDA FoodData Central. Updated April 2019.
- Vitamin C - Fact Sheet for Health Professionals. National Institutes of Health (NIH). Office Of Dietary Supplements. Updated July 2019
- Chow O, Barbul A. Immunonutrition: Role in wound healing and tissue regeneration. Adv Wound Care (New Rochelle). 2014;3(1):46–53. doi:10.1089/wound.2012.0415
- Vitamin A Fact Sheet for Professionals. National Institutes of Health Office of Dietary Supplements. February 14, 2020
- Rasmussen HM, Johnson EJ. Nutrients for the aging eye. Clin Interv Aging. 2013;8:741–748. doi:10.2147/CIA.S45399
- Chen P, Zhang W, Wang X, Zhao K, Negi D, Zhou L, et al. Lycopene and risk of prostate cancer: A systematic review and meta-analysis. Medicine (Baltimore). 2015;94(33):e1260. doi:10.1097/MD.0000000000001260
- Vissers MCM, Das AB. Potential mechanisms of action for vitamin C in cancer: Reviewing the evidence. Front Physiol. 2018;9:809. doi:10.3389/fphys.2018.00809
- Dow CA, Going SB, Chow H-HS, Patil BS, Thomson CA. The effects of daily consumption of grapefruit on body weight, lipids, and blood pressure in healthy, overweight adults. Metabolism. 2012;61(7):1026-1035. doi:10.1016/j.metabol.2011.12.004
- Zhao CN, Meng X, Li Y, et al. Fruits for prevention and treatment of cardiovascular diseases. Nutrients. 2017;9(6):598. doi:10.3390/nu9060598
- Panche AN, Diwan AD, Chandra SR. Flavonoids: An overview. J Nutr Sci. 2016;5:e47. doi:10.1017/jns.2016.41
- Bourrier T, Pereira C. Allergy to citrus juice. Clin Transl Allergy. 2013;3(Suppl 3):P153. Published 2013 Jul 25. doi:10.1186/2045-7022-3-S3-P153
- Grapefruit Juice and Some Drugs Don't Mix. U.S. Food and Drug Administration. FDA Consumer Updates. Updated July 2017.
- Grapefruit juice and statins. Harvard Medical School - Healthbeat. Harvard Health Publishing. Updated September 2019.
- Bailey DG, Dresser G, Arnold JM. Grapefruit-medication interactions: Forbidden fruit or avoidable consequences?. CMAJ. 2013;185(4):309-16. doi:10.1503/cmaj.120951
- Kanellis A, Manganaris G. Fruit Ripening. (Nath P, Bouzayen M, Mattoo A, Pech J, eds.). Oxfordshire: CABI; 2014:110.
- Wanlapa S, Wachirasiri K, Sithisam-ang D, Suwannatup T. Potential of selected tropical fruit peels as dietary fiber in functional foods. International Journal of Food Properties. 2015;18(6):1306-1316. doi:10.1080/10942912.2010.535187
- Murphy MM, Barraj LM, Rampersaud GC. Consumption of grapefruit is associated with higher nutrient intakes and diet quality among adults, and more favorable anthropometrics in women, NHANES 2003-2008. Food Nutr Res. 2014;58:10.3402/fnr.v58.22179. doi:10.3402/fnr.v58.22179
Nicki Wolf has been writing health and human interest articles since 1986. Her work has been published at various cooking and nutrition websites. Wolf has an extensive background in medical/nutrition writing and online content development in the nonprofit arena. She graduated with a Bachelor of Arts in English from Temple University.