What can vitamin C do for your immune system?

  • It can keep you from getting a cold.
  • It can shorten your cold.
  • It doesn’t help or hurt your immune system.

Show Sources

Photo Credit:Wavebreakmedia Ltd / Getty Images


National Center for Complementary and Integrative Health: “5 Tips: Natural Products for the Flu and Colds: What Does the Science Say?”

CDC: “Vaccine Effectiveness - How Well Does the Flu Vaccine Work?” “Show Me the Science - When & How to Use Hand Sanitizer,” “Preventing Seasonal Flu Illness,” “CDC Says ‘Take 3’ Actions To Fight The Flu.”

Mayo Clinic: “Vitamin C: Can it prevent colds?”

National Institutes of Health Office of Dietary Supplements: “Vitamin C.”

UpToDate: "The common cold in adults: Treatment and Prevention."