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Key Facts about Vitamin C

June 12, 2026

Researchers in Japan recently found that older adults with higher levels of vitamin C in their blood have a higher volume of gray matter in their brains and higher connectivity across brain regions involved in memory and attention.

About Vitamin C:

  • Vitamin C (also known as L-ascorbic acid or ascorbate) is a water-soluble vitamin.
  • Function:
    • It is a powerful antioxidant that can neutralize harmful free radicals.
    • It is needed for the growth and repair of tissues in all parts of your body.
    • It helps make several hormones and chemical messengers used in the brain and nerves.
    • It is used to:
      • Form an important protein called collagen, used to make skin, tendons, ligaments, and blood vessels.
      • Heal wounds and form scar tissue.
      • Repair and maintain cartilage, bones, and teeth.
      • Aid in the absorption of iron.
    • Sources:
      • Unlike most mammals and other animals, humans do not have the ability to synthesize vitamin C and must obtain it from the diet.
      • Vitamin C comes from fruits and vegetables.
      • Good sources include berries, cantaloupe, tomatoes, peppers, potatoes, cabbage, Brussels sprouts, broccoli, spinach, and citrus fruits, such as oranges.
      • Some juices and cereals have added vitamin C.
      • Vitamin C is sensitive to heat, so some of its nutritional benefits can be lost during cooking. Raw foods are more beneficial as dietary sources.
    • Vitamin C Deficiency:
      • Vitamin C is not stored in body, so deficiency can happen quickly.
      • Vitamin C deficiency is more likely in people who:
        • Smoke or are around secondhand smoke.
        • Have certain conditions of the digestive tract or certain types of cancer.
        • Have a diet that doesn't include enough fruits and vegetables.
      • Not having enough vitamin C can lead to a condition called scurvy.
        • Scurvy causes anemia, bleeding gums, bruising, and poor wound healing.

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