Your health Is directly related to how well your body responds to fight bacteria and viruses that can lead to inflammation, infection, and illness. This line of defense against intruders is known as the immune system. You can support your immune system and keep it strong with regular handwashing, proper nutrition, physical health, and mental well-being.
A healthy lifestyle, including a diet rich in nutritious foods, is important to your well-being and ability to maintain your immune system. Nutrient deficiencies can impair immune function and decrease the body’s resistance to infections. Nutrients work together to build a healthy immune system to defend against sickness.
Nutrition Strategies to Boost Your Immune System
- Don’t over-consume calories, saturated fats, or excess sugar and salt.
- Eat a well-balanced diet that includes a variety of fruits, vegetables, grains, and legumes.
- Read nutrition labels.
- Consider taking a daily multivitamin.
All nutrients are important, but several are particularly important to supporting your immune health, including antioxidants, Vitamin C, Vitamin A, Vitamin E, Vitamin D, zinc, and omega-3 fatty acids.
Phytonutrients and Antioxidants
Phytochemicals are naturally occurring compounds in plants that protect plants from fungus, germs, and insects and are responsible for the color, taste, and smell of plant foods.
In the body, many phytochemicals, vitamins, and minerals act as antioxidants, which help to protect cells from damage. Phytochemicals have health properties that are:
- Cardio-protective
- Anti-diabetic
- Anti-inflammatory
- Anti-cancer
Vitamin C strengthens the immune system, repairs damaged cells, and helps defend against foreign invaders. Vitamin C is found in a wide variety of fruits and vegetables such as oranges, grapefruit, and bell peppers.
Vitamin A is known to promote healthy growth and distribution of cells, and support skin and eye health. Sources include orange vegetables (pumpkin, carrots, and sweet potatoes), leafy greens (spinach, kale, and broccoli), fish, dairy products, and eggs.
Vitamin E has antioxidant properties that protect cells from damage, support a healthy heart, and may help to prevent some types of cancer. Good sources of Vitamin E include many plant oils like sunflower oil and almond oil and healthy fats found in avocado and almonds.
Vitamin D is known to promote anti-inflammatory cells and help regulate cells involved in the immune response and healing. Vitamin D is also needed for the body to absorb calcium. Sources include sunlight (your body makes vitamin D from sunlight!), fortified foods (usually dairy and soy products), and fatty fish (salmon, tuna, and mackerel).
Zinc is a trace element shown to improve brain function and strengthen the immune system by promoting wound healing and decreasing inflammation. Zinc is found in lean meats, seafood, legumes, and nuts.
Omega-3 fatty acids are important in controlling inflammation. The body cannot make these fatty acids so they must be consumed in the diet. Plant sources include chia seeds, edamame, avocado, and oats, while animal sources include salmon and tuna.
What About Supplements?
If a well-balanced diet Is not regularly accessible, you may consider taking a multivitamin. Talk with your healthcare provider to decide if a daily multivitamin or other dietary supplements are right for you. Always be sure to read labels carefully for the serving size, ingredients, and “USP Verified” seal to ensure the supplement contains the actual ingredients listed and is made according to FDA guidelines. Choose a multivitamin that is all-inclusive to meet the daily RDA (Recommended Dietary Allowance). Adhere to the serving size to meet the RDA for daily multivitamins or individual vitamin supplements, unless instructed otherwise by a doctor. Dangers of supplement interactions or overdose include upset stomach, headache, and blocking other nutrients from being absorbed by the body. For more information about dietary supplements, visit the U.S. Food & Drug Administration or the National Institutes of Health – Office of Dietary Supplements.
Additional Resources:
Centers for Disease Control and Prevention
https://www.cdc.gov/nccdphp/dnpao/features/enhance-immunity/index.html
Academy of Nutrition and Dietetics
https://www.eatright.org/health/wellness/healthful-habits/how-to-keep-your-immune-system-healthy
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