The Ultimate Immunity-Enhancing Vegetable, Recommended by a Registered Dietitian

It’s widely known that vegetables rank among the top immunity-boosting foods. Packed with vital nutrients, they help safeguard cells and combat illness-inducing pathogens. But which vegetable stands above the rest? Below, a dietitian reveals the top vegetable for immune health, its benefits, and tips for incorporating it into your diet.

Top Immunity-Boosting Vegetable

For immune health, red bell peppers take the top spot, as highlighted by Kristen Lorenz, a registered dietitian.

“Red bell peppers are loaded with nutrients that bolster immunity, particularly vitamin C and vitamin A,” Lorenz explains. Vitamin C enhances the function of neutrophils, a type of white blood cell that combats pathogens, she notes. Additionally, it acts as an antioxidant, shielding cells from harm. Vitamin C also aids in collagen production, which is vital for maintaining the skin and mucous membranes—our body’s primary defense against germs, Lorenz adds.

Interestingly, red bell peppers contain more vitamin C than oranges, a fruit commonly linked to immune health. “A medium orange offers around 70 mg of vitamin C, whereas a red bell pepper of similar size provides 150 to 190 mg,” Lorenz states. “This makes red bell peppers one of the most powerful natural sources of this immune-enhancing vitamin, surpassing many fruits and vegetables,” she emphasizes.

Regarding vitamin A, Lorenz explains, “Red bell peppers are abundant in beta-carotene, which the body converts into vitamin A.” This vitamin plays a key role in the function of T cells and B cells, essential for immune defense. It also supports antibody production and immune cell activity, helping the body combat infections effectively. Like vitamin C, vitamin A is crucial for maintaining healthy skin and mucous membranes, which serve as barriers against pathogens, Lorenz adds.

But that’s not all: Lorenz points out that red bell peppers also contain vitamin E, folate, and traces of zinc and selenium. Vitamin E, an antioxidant, works alongside vitamin C to protect cell membranes and support immune cells. “Folate is necessary for DNA synthesis, aiding in the growth and development of immune cells, while zinc and selenium enhance immune function, promote healing, and help reduce inflammation,” Lorenz concludes.

Additionally, red bell peppers are a great source of fiber, a nutrient essential for maintaining a healthy gut and supporting gut bacteria. This plays a significant role in immune health, as a well-functioning gut is crucial for an effective immune response.

What’s the Deal with Green, Yellow, and Orange Bell Peppers?

Contrary to common misconceptions, bell peppers of various colors come from the same plant but differ in their ripeness levels.

Red bell peppers are fully matured on the vine, whereas other colors are less ripe. “This ripening process increases both vitamin C and beta-carotene content, making red bell peppers superior for immune support compared to their less ripe counterparts,” Lorenz explains.

Ways to Incorporate More Red Bell Peppers into Your Diet

Now that you’re aware of the immune-enhancing benefits of red bell peppers, here are some tips to include more of them in your diet!

Enjoy Raw Slices as a Snack

Lorenz notes that red bell peppers are sweeter compared to green, yellow, and orange varieties, making them ideal for snacking. “Pair raw bell pepper strips with hummus or tuna salad for a combination of fiber and protein that keeps you satiated longer,” she suggests.

Incorporate Red Bell Peppers into Stir-Fry Dishes

Add chopped red bell peppers to your next stir-fry for a nutrient-rich crunch that enhances immunity. Lorenz advises, “Include them in the final minutes of cooking to preserve their vitamin C content, which can diminish with extended heat exposure.”

Use Them in Soups

Lorenz suggests incorporating roasted bell peppers into pureed soups for added creaminess and a boost in vitamins. This dual benefit enhances dishes like Vegan Creamy Tomato Soup, Harissa Carrot Soup, or Red Lentil Squash Soup With Lemon.

Incorporate Peppers into Quiche

Enhance your go-to quiche recipe by adding diced red bell peppers. They also work well in quiche cups, ideal for a quick breakfast. Remember to cook the peppers beforehand to reduce moisture and avoid a soggy quiche.

Prepare Stuffed Peppers

“While green bell peppers are commonly used in stuffed pepper recipes, red bell peppers make a fantastic alternative,” Lorenz suggests. “Fill them with seasoned ground turkey and rice, sprinkle cheese on top, and bake for a wholesome, nutrient-packed dish.” For a vegetarian option, replace the turkey with beans, lentils, or crumbled tempeh.