A strong immune system requires adequate nutrition. While no single food or supplement will prevent illness, consistently supporting your immune system through diet can improve your resilience.
Key Immune-Supportive Nutrients
- Vitamin C: Immune cell function. Citrus, bell peppers, strawberries.
- Vitamin D: Immune regulation. Sunlight, fatty fish, fortified foods. Many people need supplementation.
- Zinc: Immune cell development and function. Oysters, beef, pumpkin seeds.
- Vitamin A: Barrier function and immune regulation. Sweet potatoes, carrots, liver.
- Omega-3s: Reduce inflammation, support immune cell function.
What Weakens Immunity
Poor sleep, chronic stress, ultra-processed foods, alcohol excess, and nutrient deficiencies all impair immune function. Nutrition works alongside these lifestyle factors.
