Vitamin C
Vitamin C is a water-soluble vitamin involved in maintenance and antioxidant activity. Used by those who feel their diet falls short.
What it is
A water-soluble vitamin the body doesn't store well.
Role in the body
Supports collagen formation, iron absorption and antioxidant activity.
Why people consider it
Considered by people who eat few fruits and vegetables.
Food sources
- Citrus
- Peppers
- Broccoli
- Strawberries
Typical labeled usage
Follow the labeled serving.
Recommended amount
The upper intake level for adults is about 2,000 mg/day.
Amounts are common educational ranges based on public reference values and product labels — not individual medical advice. If you have a condition, take medication, or are pregnant or breastfeeding, consult a physician or pharmacist.
When people take it
Some split the dose across the day.
Evidence summary
Vitamin C is needed for normal body function
Established evidenceIts role as an essential nutrient is established.
Who should exercise caution
Who should exercise caution
- Consult a physician if you have a history of kidney stones
Potential medication interactions
- Few notable general interactions
Possible side effects
- High doses may cause loose stools
Upper-limit guidance
An upper-limit guideline exists; check official references.
Products & brands
Related articles & packs
Monthly packs
References
- Dietary Reference Intakes for Japanese (2020) — Ministry of Health, Labour and Welfare (Japan)
- Dietary Supplement Fact Sheets — NIH Office of Dietary Supplements