OptimealHealth
Immunité et nutrition

Vitamin C and Immunity

Vitamin C is crucial for activating and protecting immune cells.

Definition

A water-soluble vitamin essential for immune cell function that enhances the production and activity of white blood cells. It also acts as an antioxidant, protecting immune cells from damage.

How it works

Vitamin C, also known as ascorbic acid, is a powerful immune modulator that supports both innate and adaptive immunity. It enhances the function of phagocytes and lymphocytes, which are key immune cells responsible for identifying and destroying pathogens. This vitamin also strengthens the integrity of epithelial barriers, which serve as physical defenses against infection. Additionally, vitamin C exhibits potent antioxidant properties that prevent oxidative stress in immune cells, maintaining their effectiveness. Regular vitamin C intake is particularly important during periods of physical or emotional stress when immune demand increases.

Role

Supports white blood cell function and provides antioxidant protection for immune cells.

Examples

  • Oranges and citrus fruits
  • Bell peppers
  • Kiwi
  • Broccoli
  • Strawberries

Recommendations

Aim for 75-90 mg daily for adults through whole food sources like citrus fruits and vegetables. Consume vitamin C-rich foods raw or lightly cooked to preserve nutrients. During times of high stress or illness, consider increasing intake through food or supplementation.

Key takeaway

Vitamin C is a foundational nutrient that activates immune defenses and protects immune cells from damage.

A question about Vitamin C and Immunity? Ask our nutrition AI.

Ask a question