Your immune system is your body’s defense against illness, infections, and fatigue. To keep it performing at its best, proper nutrition is essential. Among the most impactful nutrients are vitamins to increase immune system function. These essential compounds work to strengthen immunity, reduce inflammation, and protect your cells.

In this article, we’ll explore the top vitamins to increase immune system performance and where to find them.

1. Vitamin C: Immune Booster and Antioxidant

Perhaps the most well-known among vitamins to increase immune system, Vitamin C supports the production of white blood cells and reduces oxidative stress. Found in oranges, strawberries, and bell peppers, it’s a must-have for daily immune support.

2. Vitamin D: Essential for Immune Activation

Vitamin D helps activate immune cells and has been linked to lower risks of respiratory infections. If you’re not getting enough sunlight, consider adding this vital vitamin to increase immune system function to your daily supplement routine.

3. Vitamin E: Protects Immune Cells

Vitamin E is a fat-soluble antioxidant that helps protect immune cells from damage. As one of the top vitamins to increase immune system resilience, it’s especially beneficial for aging adults.

4. Vitamin A: Guards Against Infection

Vitamin A supports the mucous membranes in your respiratory and digestive systems. These membranes act as your body's first line of defense. Among vitamins to increase immune system, Vitamin A is essential for warding off viruses and bacteria.

5. Vitamin B6: Powers Immune Response

B6 plays a role in producing antibodies and immune messenger proteins. This powerful vitamin to increase immune system responsiveness is found in bananas, chickpeas, and fortified cereals.

6. Vitamin B12: Prevents Immune Weakness

Deficiencies in B12 can lead to immune suppression and fatigue. Supplementing with this vital nutrient is one of the most effective ways to use vitamins to increase immune system performance, especially in vegetarians or older adults.

7. Folate (Vitamin B9): Supports Cell Regeneration

Folate is key in DNA repair and cell creation, crucial for healthy immune cell production. Add this to your list of vitamins to increase immune system and support healthy tissue growth and repair.

8. Vitamin K2: Emerging Support for Immunity

Recent studies suggest Vitamin K2 may support immune function by aiding gut health and reducing inflammation. While it’s not as well known, it’s becoming a trusted vitamin to increase immune system function in holistic health communities.

9. Multivitamins: A Daily Immune Solution

Sometimes, the easiest way to ensure you get all the right vitamins to increase immune system function is with a daily multivitamin. Choose formulas that are clean, bioavailable, and tailored to your age and gender.

10. Why Choose TwentyOneAgain for Immune Support?

At TwentyOneAgain, we formulate clean, science-backed vitamins to increase immune system resilience and energy. Whether you're looking to stay well year-round or recover faster, our curated supplements support you naturally.