An 8-ounce glass of 100% grapefruit juice or ½ of a medium fresh grapefruit are excellent sources of vitamin C, providing 60% (juice) and 50% (fruit) of the recommended Daily Value.*
Vitamin C plays a key role in supporting a healthy immune system 1-4 and may reduce the duration and severity of cold symptoms.5 Vitamin C is thought to have an anti-histamine effect,1,4,6 and may support lung function.1,7 Furthermore, the absorption of iron found in plant-based foods may increase when consumed with vitamin C.1-4 Thus, consuming fresh grapefruit or 100% grapefruit juice along with plants high in iron, such as dark leafy greens or lentils, may help your body absorb more iron.
Vitamin C is an antioxidant found in food and is necessary for collagen formation, an essential component of skin, bones, gums, and cartilage.1-4 Vitamin C also helps regenerate vitamin E into its antioxidant form providing further protection against damage.1,3
Fruits and vegetables supply about 90 percent of the vitamin C in the diets of the general population.3 Citrus fruits and juices are some of the richest sources of vitamin C.8 Kale, kiwi, and cauliflower also have significant amounts of vitamin C.
Citrus juices, such as 100% grapefruit juice, are reported to be the largest contributor of vitamin C in the diet.9
Life Stage Benefits
Below are age-specific benefits vitamin C provides the body.
- Helps baby’s developing bones and tissues.
- Iron needs increase during pregnancy,1 and vitamin C may promote the absorption of plant-based iron when consumed together.1-4
- Vitamin C needs greatly increase during breastfeeding.1
- Vitamin C intake by mothers may influence the amount of vitamin C in breast milk10 so consuming vitamin C-rich foods during pregnancy and lactation is important.
Kids, Teens & Young Adults
- Helps with the healing of cuts and scrapes.
- Supports developing bones and tissues.
- Supports a healthy immune system to help a body in its natural fight against infection.
- Vitamin C’s antioxidant activity helps to mitigate inflammation, which is associated with many chronic diseases.
- Vitamin C needs increase during wound healing.11
- May support cardiovascular health.2-4
- Plays a role in healthy aging of the brain, particularly in elderly with insufficient vitamin C status.2
- Diets low in fat and containing fiber, vitamin A or vitamin C may reduce the risk of some types of cancers – A disease associated with many factors.12
Learn more about the health benefits of fresh Florida Grapefruit and Florida Grapefruit Juice.
* Daily Value: Based on a 2000 calorie diet. FDA rounding rules applied when calculating percent DV based upon 2018 rules. Information is not intended for labeling food in packaged form. Nutrient values may vary based on brand or product types.
- Vitamin C. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids. Washington, D.C.: National Academy Press; 2000:95-185.
- Vitamin C. Linus Pauling Institute Micronutrient Information Center. Oregon State University.
- Lykkesfeldt et al. Adv Nutr 2014; 5:16-18.
- Vitamin C. Health Professionals Fact Sheet. Office of Dietary Supplements. National Institutes of Health.
- Hemila et al. Cochrane Database Syst Rev. 2013(1):Cd000980.
- Chatterjee et al. Annals of the New York Academy of Sciences. 1975;258(1):24-47.
- Hemila, BMJ Open. 2013;3:002416.
- USDA FoodData Central.
- Chun et al. J Nutr 2010;140:317-324.
- Bravi et al. Am J Clin Nutr 2016;104:646-62.
- The A.S.P.E.N. Adult Nutrition Support Core Curriculum, 2nd Ed. American Society of Parental and Enteral Nutrition. 2012.
- A Food Labeling Guide; Guidance for Industry. FDA Center for Food Safety and Applied Nutrition. January 2013.