10 Plant-Based Foods That Boost Your Immunity

1 Garlic

The most pungent of the plant kingdom inhabitants, garlic contains the immune-stimulating compound allicin, which promotes the activity of white blood cells to destroy cold and flu viruses. It also stimulates other immune cells, which fight viral, fungal, and bacterial infections. Garlic kills with near 100 percent effectiveness the human rhinovirus, which causes colds, common flu, and respiratory viruses.

Because allicin is released when you cut, chop, chew, or crush raw cloves, allow freshly chopped garlic to stand for 10 minutes and then cook it, sprinkle it over foods, drop it into soup, or swallow bits of garlic with some water like a pill. You can also drop a clove of garlic into some honey and swallow it immediately for a quick dose that tastes good!

2 Onions

Onions, like garlic, contain allicin. They also contain quercetin, a nutrient that breaks up mucus in your head and chest while boosting your immune system. Additionally, the pungency of onions increases your blood circulation and makes you sweat, which is helpful during cold weather to help prevent infections. Consuming raw onion within a few hours of the first symptoms of a cold or flu produces a strong immune effect.

Chopping onions into your favorite soup or cooked recipe is a great way to enjoy them. Also, it may sound a little weird, but putting half an onion in your bedroom while you sleep can help absorb some of the circulating bacteria and potentially lessen the symptoms of your cold.

3 Ginger

Spicy, pungent, and delicious, ginger reduces fevers, soothes sore throats, and encourages coughing to remove mucus from the chest. Anti-inflammatory chemicals like shagaol and gingerol give ginger that spicy kick that stimulates blood circulation and opens your sinuses. Improved circulation means more oxygen is getting to your tissues to help remove toxins and viruses.

4 Cayenne

The cayenne family of hot peppers (cayenne, habanero, Scotch bonnet, and bird peppers, to name a few) contains capsicum — a rich source of vitamin C and bioflavonoids, which aid your immune system in fighting colds and flus. It does this by increasing the production of white blood cells, which cleanse your cells and tissues of toxins.

Cayenne pepper is also full of beta carotene and antioxidants that support your immune system and help build healthy mucus membrane tissue that defends against viruses and bacteria. 
The fresher the pepper, the more effective it is. However, fresher also means spicier, so choose accordingly.

5 Squash

Squash is a good source of vitamin C and carotene. The six carotenoids (out of the 600 found in nature) found most commonly in human tissue — and supplied by squash and other gourds — decrease the risk of various cancers, protect the eyes and skin from the effects of ultraviolet light, and defend against heart disease.

One of them, alpha-carotene, helps slow down the aging process. Butternut squash is the strongest source of these nutrients, but you can also try acorn, Hubbard, delicata, calabaza, and spaghetti squash.

6 Kale

Like other leafy greens, kale offers up a good dose of vitamin E. This immunity-boosting antioxidant is known for increasing the production of B cells, those white blood cells that kill unwanted bacteria. Whether you eat kale raw in a salad, steam it, or lightly sauté it, you’ll reap all of its wonderful benefits.

7 Citrus Fruits

Adding a bit of citrus to your diet goes a long way toward fending off your next cold or flu. Packed with vitamin C, oranges and grapefruits help increase your body’s resistance to nasty invaders.

The best way to enjoy citrus fruits is to eat them whole. Otherwise, you can make fresh juice yourself (stay away from the premade stuff in cartons or in the freezer section at your supermarket).

8 Green Tea

Green tea is a potent source of antioxidants called polyphenols — especially catechinsSipping a hot cup of green tea when you’re feeling under the weather can really help you come alive again. Try adding some honey or lemon to kick it up a bit.

9 Miso Soup

Miso soup is the plant-based version of chicken-noodle soup. It has wonderful healing properties that are amazing at boosting immunity. As a living food, miso is loaded with enzymes and healthy bacteria that help fight infection and keep your cells thriving.

10 Mushrooms

For centuries, people around the world have turned to mushrooms for a healthy immune system. Mushrooms increase the production and activity of white blood cells, making them more aggressive. This is a good thing when you have an infection.
Shiitake, maitake, chaga, and reishi mushrooms appear to pack the biggest immunity punch

Source: dummies.com