Return to Index
Vitamin C (Ascorbic Acid)
- Acting as an antioxidant in the body
- Playing a major role in collagen formation
- Assisting in the synthesis of a neurotransmitter, norepinephrine
- Helping break down cholesterol and synthesize bile
- Playing a role in the absorption, metabolism, and utilization of other nutrients, such as folate, calcium, and iron
- Promoting healing of wounds
|Age Group (in years)||
Recommended Dietary Allowance
(mg/day) [milligrams per day]
Vitamin C Deficiency
- Bleeding gums
- Easy bruising
- Impaired wound and fracture healing
- Joint pain and swelling
- Loose and decaying teeth
- Hair loss
- Bone pain and fractures
Vitamin C Toxicity
- Ages 1-3: 400 mg/day
- Ages 4-8: 650 mg/day
- Ages 9-13: 1,200 mg/day
- Ages 14-18: 1,800 mg/day
- Ages 19+: 2,000 mg/day
- Excessive urination
- Abdominal cramps
- Formation of kidney stones in susceptible people
Major Food Sources
- Green or red peppers
- Tomato juice
- Baked potato
- Green peas
Populations at Risk for Vitamin C Deficiency
- People who smoke cigarettes—Due to an increased metabolic turnover of vitamin C, smokers have lower blood vitamin C levels. It is recommended that smokers take 35 mg more per day than the applicable RDA.
- People who drink excessive amounts of alcohol—This may, in part, be due to a nutritionally inadequate diet.
- The elderly—Studies have shown that older adults have lower levels of serum vitamin C. This may be due to a diet lacking in essential nutrients.
- Infants—Feeding babies evaporated or boiled milk can cause vitamin C deficiency. This is because heat can destroy the vitamin C found in cow's milk.
- People with limited variety in their diet—People whose diets are affected by poverty; food faddists; and people with mental illness may not prepare meals that contain a variety of foods to obtain enough vitamin C.
- People with malabsorption and certain chronic diseases—Those with certain medical conditions like severe intestinal malabsorption, renal disease, or cancer may not be able to absorb enough vitamin C.
Tips For Increasing Your Vitamin C Intake:
- Serve fruits and vegetables raw whenever possible.
- Leave the skin on potatoes and sweet potatoes.
- Add sliced strawberries, mango, or kiwi to your breakfast cereal.
- Use mashed avocado in place of mayonnaise as a sandwich spread.
- Throw snow peas in your stir-fry.
- Replace your morning coffee with a glass of orange or grapefruit juice.
- If you take a vitamin supplement, make sure it contains vitamin C.
- Reviewer: Michael Woods, MD
- Review Date: 07/2016
- Update Date: 07/21/2016