The Immune System and Nutrition: Key Vitamins and Minerals 

By Alexandria Hadley, MS, RD, LD |

Our immune system plays a crucial role in protecting us from harmful germs and diseases. What we eat can have a big impact on how well our immune system works. Let’s explore some important vitamins and minerals that support immunity and where to find them in food. 

 Vitamin C 

Vitamin C is a powerful antioxidant that helps our immune cells work better. It’s found in many fruits and vegetables, including: 

– Citrus fruits (oranges, grapefruits) 

– Berries 

– Bell peppers 

– Broccoli 

– Tomatoes 

Vitamin D 

Vitamin D is essential for proper immune function. Good sources include: 

– Fatty fish (salmon, tuna) 

– Egg yolks 

– Fortified milk and juices 

Zinc 

Zinc helps our body make new immune cells. You can get zinc from: 

– Red meat 

– Seafood 

– Poultry 

– Whole grains 

– Beans 

Vitamin A 

Vitamin A supports the health of our skin and tissues, which act as barriers against infections. Foods rich in vitamin A include: 

– Sweet potatoes 

– Carrots 

– Spinach 

– Mangoes 

Probiotics 

Probiotics are good bacteria that help our gut and immune system. They can be found in: 

– Yogurt 

– Kefir 

– Kimchi 

– Fermented foods like sauerkraut 

Magnesium 

Magnesium helps regulate our immune response. Good sources are: 

– Nuts (like cashews) 

– Legumes 

– Dark green vegetables 

– Whole grains 

To support your immune system, it’s best to eat a variety of whole foods, especially fruits, vegetables, lean proteins, and whole grains. This gives your body the nutrients it needs to fight off infections and stay healthy. Remember, no single food can boost your immune system on its own. A balanced diet, along with other healthy habits like regular exercise and good sleep, is key to keeping your immune system strong.