Keeping your immune system healthy is very important, no matter the season.
Naturally, what you eat can majorly influence your immune health.
Certain foods may actually decrease your chances of getting sick, while others can help you recover more quickly if you do get ill.
This article lists 10 foods you should eat if you want to boost your immune system.
1. Iron-Rich Foods
That’s why it’s important to optimize your intake of iron-rich foods, such as meat, poultry, fish, shellfish, legumes, nuts, seeds, cruciferous vegetables and dried fruit.
You can also improve your absorption of iron from foods by using cast-iron pots and pans to cook, and avoiding tea or coffee with meals.
Combining iron-rich foods with a source of vitamin C can help boost your absorption even further.
Therefore, it’s best to use iron supplements only if you have an iron deficiency, or on the advice of a doctor.
Bottom Line: Optimal blood iron levels help improve your immune function. Therefore, it’s advantageous to include iron-rich foods in your diet.
2. Probiotic-Rich Foods
Foods that are rich in probiotics are thought to help enhance your immune function.
Probiotics are beneficial bacteria that live in your gut and help stimulate your immune system.
Studies also show that when people do get sick, those who regularly consume probiotics are up to 33% less likely to need antibiotics. In certain cases, regularly consuming probiotics may also lead to a faster recovery from illness (12, 13, 14).
Most studies on the topic provided participants with probiotic supplements. However, it’s also possible to increase your intake by making probiotic foods a regular part of your diet (16).
Great sources of probiotics include sauerkraut, naturally fermented pickles, yogurt, kefir, buttermilk, kimchi, tempeh, miso, natto and kombucha.
Bottom Line: Probiotics can help strengthen your immune system. This may reduce the likelihood and severity of your symptoms and help you recover faster when you do fall ill.
3. Citrus Fruit
Fruits like oranges, grapefruits and tangerines are high in vitamin C, a well-known immunity booster.
Vitamin C is recognized for its antibacterial and anti-inflammatory properties. It also helps maintain the integrity of your skin, which acts as a protective barrier against infection (17).
That said, it might be more advantageous to increase your intake from plant foods rather than supplements, since plants contain other beneficial compounds that supplements may not.
Other foods high in vitamin C include bell peppers, guavas, dark leafy greens, broccoli, berries, tomatoes, papaya and snap peas.
Bottom Line: Citrus fruit and other vitamin-C-rich foods can help boost your immune system. This likely lowers your risk of infection and may even speed up your recovery.
Studies on human cells show that fresh ginger may also help fight the human respiratory syncytial virus (HRSV), a virus responsible for many respiratory infections. However, more studies in humans are needed to support this protective effect (29).
Ginger’s effects may be especially potent if the ginger compounds are already present in your body before the infection occurs (29).
Finally, ginger also has anti-nausea effects, which may help decrease your nausea symptoms when you have the flu (30).
More research is needed to determine effective dosage guidelines.
In the meantime, simply add a sprinkle of fresh or dried ginger to your dishes or smoothies. You can also sip on a fresh ginger infusion or use pickled ginger as a probiotic-rich palate cleanser between dishes.
Bottom Line: Making ginger a regular part of your diet may help decrease your risk of infection and reduce nausea symptoms when you’re sick.
In one study, participants given a daily allicin supplement experienced colds 63% less often than the placebo group. In addition, when they did get sick, participants in the allicin group recovered 3.5 days faster, on average (33).
In another study, participants given a daily aged garlic extract supplement were sick just as frequently as the placebo group. However, they reported 21% fewer symptoms and recovered 58% more quickly than the placebo group (34).
To maximize garlic’s immune-boosting effects, aim to eat one clove two to three times per day.
Bottom Line: Consuming two to three cloves of fresh garlic per day may help boost your immune system. Garlic seems particularly effective at reducing the symptoms and duration of the common cold and flu.
This could be because berries are a rich source of polyphenols, a group of beneficial plant compounds with antimicrobial properties.
For instance, quercetin, one berry polyphenol, is thought to be particularly effective at reducing your risk of getting ill after a bout of intensive exercise (39).
Studies also show that berries and their polyphenols have the ability to protect against the influenza virus responsible for the flu (40).
Berries also contain good amounts of vitamin C, which adds to their immune-boosting properties.
Bottom Line: Berries contain beneficial plant compounds that may help reduce your risk of viral or bacterial infections.
7. Coconut Oil
Coconut oil contains medium-chain triglycerides (MCTs), a category of fats with antimicrobial properties.
The most common type of MCT found in coconut oil is lauric acid, which is converted into a substance known as monolaurin during digestion.
Both lauric acid and monolaurin have the ability to kill harmful viruses, bacteria and fungi (43).
Researchers also believe that coconut oil may be effective against the viruses responsible for influenza and hepatitis C. It may also help fight Candida albicans, a common cause of yeast infections in humans (44, 45, 46).
You can easily add coconut oil to your diet by using it instead of butter or vegetable oils in cooking or baking.
Consuming up to two tablespoons (30 ml) per day should leave enough room to continue including other healthy fats in your diet, such as avocados, nuts, olives and linseed oil.
However, you might want to increase your intake gradually to avoid the nausea or loose stools that can occur with high intakes.
Bottom Line: The type of fat found in coconuts may help protect you against various viral, bacterial and fungal infections.
Licorice is a spice made from the dried root of the Glycyrrhiza glabra plant.
It has been used in traditional herbal medicine in Asia and Europe for thousands of years.
That said, many products containing licorice are also very high in sugar. Those trying to reduce their sugar intake should look for lower-sugar options, such as licorice tea.
Individuals at risk of these should limit their consumption.
Bottom Line: Licorice may help your body fight various viruses, bacteria and fungi. However, excessive intake may increase the risk of certain adverse effects, including high blood pressure.
9. Nuts and Seeds
Nuts and seeds are incredibly nutrient-rich.
Sesame seeds and almonds are particularly good sources of copper and vitamin E, while pumpkin seeds and cashews are rich in zinc.
As for selenium, you can meet your daily requirement by eating just a single Brazil nut per day.
Bottom Line: Nuts and seeds are good sources of selenium, copper, vitamin E and zinc, all of which play an important role in immune health.
10. Sweet Potatoes
Sweet potatoes are not only delicious — they’re also rich in vitamin A.
Not consuming enough foods rich in vitamin A can lead to a deficiency, which studies link to a weaker immune system and a higher sensitivity to infections (60).
For instance, one study reports that vitamin-A-deficient children were 35% more likely to suffer from respiratory symptoms, compared to those with normal vitamin A levels (61).
Another study reports that giving infants vitamin A supplements may help improve their response to certain vaccines (62).
However, excessive vitamin A intake can lead to adverse effects such as nausea, headaches, weaker bones, coma and even premature death — especially if you take the vitamin A in supplement form (63).
High intakes of vitamin A supplements during pregnancy may also increase the risk of birth defects. Therefore, it might be safest to meet your vitamin A requirements through diet instead of supplements (63).
Besides sweet potatoes, other foods that are high in vitamin A include carrots, dark-green leafy vegetables, squash, romaine lettuce, dried apricots, red peppers, fish and organ meats.
Bottom Line: Sweet potatoes and other vitamin-A-rich foods may help boost the immune system and lower the likelihood of infection.
A well-functioning immune system requires a good intake of various nutrients.
People consuming a well-balanced diet rich in the foods described above should have no difficulty reaching their daily requirements.
However, some may be unable to meet their recommended daily nutrient intakes through diet alone.
If this is the case for you, consider adding the following supplements to your diet:
- Probiotics: Ideally Lactobacillus or Bifidobacterium strains in amounts between 2–3 billion colony-forming units (CFUs) per day (64).
- Vitamin C: Consider taking about 75–90 mg per day. Increasing your daily dose to up to 1 gram per day may provide extra benefits during illness (19, 65).
- A multivitamin: Look for one containing iron, zinc, copper, vitamin E and selenium in amounts sufficient to help you meet 100% of the RDIs.
- Zinc lozenges: Doses of at least 75 mg per day at the first onset of cold symptoms may help reduce the duration of the infection (66).
Bottom Line: The supplements above may help boost immune function in individuals who are unable to meet their daily nutrient requirements through diet alone.
Take Home Message
Your diet plays an important role in the strength of your immune system.
Regularly consuming the foods listed above may help reduce how frequently you get sick and may help you recover from illness more quickly.
Those unable to add these foods to their diets might want to consider taking supplements thought to have immunity-boosting properties.
Breakfast, blood sugar, & inflammation
Recent research has shown that Inflammation is responsible for 7 out of 10 Deaths in the United States. But it doesn’t have to be the same way for you.
In fact, in a fairly short amount of time, you could start to experience better sleep…less stomach issues…more energy and stamina…less muscle and joint pain…a drop in weight…lower stress levels…and much, much more!
Learn how to Prevent—Even Reverse—Most Major Diseases by “Turning Off” Inflammation!
Did you know that one of the best times to stretch is right before bed? However…
What stretches should you do? Here’s a 1-minute stretch routine you can do before bed...
Lisa, Yoga Coach
eatlocalgrown / wisemindhealthybody
...easy, 3-minute exercise that completely cured his horrendous snoring! We can both finally sleep!
Today is a good day. Tonight will be even better. Why?
Because you're about to learn easy throat exercises that cure (not just treated) your stubborn snoring – in 3 minutes – starting TONIGHT!
...even if straps, sprays and even torturing CPAP masks have failed you in the past.
Most people heal their snoring in just a few minutes per day using these powerful throat exercises. And they're so easy, you can do them, regardless of your age or physical shape.
Use them anytime, anywhere... even while stuck in traffic or watching TV.
Plus the results are permanent!
Did you know that your bodyfat can become "calorie-resistant"?
True. And it's completely unaffected by even the strictest diets... and most intense exercises.
However, there's good news- Calorie-resistant bodyfat can be now removed...
It's a little-known, calorie-burning hormone we all have... just waiting for the right spark to come alive. It's not thyroid, leptin, ghrelin, insulin, adiponectin, HGH or any other "fat loss" hormone you may know. Read more to find out precisely how to unleash its calorie-burning power:
To your health!
PS - Studies show that it can also reduce your risk of diabetes by 53.7%, a heart attack by 83.3% and stroke by 51.4%. Here's more of the scientific proof...
I bet you can’t guess which muscle in your body is the #1 muscle that eliminates joint and back pain, anxiety and looking fat. This “hidden survival muscle” in your body will boost your energy levels, immune system, sexual function, strength and athletic performance when unlocked.
If this “hidden” most powerful primal muscle is healthy, we are healthy.
d) Hip Flexors
Take the quiz above and see if you got the correct answer!
In April, 2009, researchers stunned the medical community when they reported chronic inflammation as the root cause of several major diseases.
See, every year 610,000 people in the U.S. die of heart disease. Cancer claims another 584,000...stroke 130,000...Alzheimer's disease nearly 85,000 — and the list goes on.
Truth is, we now know... chronic inflammation is responsible for 7 out of the top 10 leading causes of death in the United States! Hundreds of studies and scientific reviews prove it.
Fortunately, newer research shows you can prevent-even reverse-most major diseases by "turning off" inflammation. And in our new book, we show you how to do just that.
If you or a loved one is suffering from a debilitating condition-and you"re not sure what the culprit is-now's the time to find out...while you can still do something about it!
--> Grab your FREE copy of this groundbreaking soft cover book today (while supplies still last.)
Over the past year, my friend Dave over at PaleoHacks has been working on a super secret cookbook project with our good friend Peter Servold a Le Cordon Bleu trained Chef and owner of Pete's Paleo...
And today, this new incredible Paleo Cookbook is finally available to be shipped right to your door for FREE!
The cookbook is called Paleo Eats, and it's filled with over 80 chef created, insanely tasty Paleo recipes which means they are free from gluten, soy, dairy, and refined sugar.
Get your FREE copy of Paleo Eats Here. (Grab this today, because they only ordered a small batch of these cookbooks for this freebie promotion, and they will sell out FAST!)
Sponsored Health Resources
In the years that I've been working on this website project I've come across some amazing resources by some very special people. I'd like to share them with you here.
NOTE: I update these links often so please check back to see what's new!
1) Everyone knows green smoothies are healthy right? Have you heard of a “red” smoothie? If not, check out this story…
2) Forget what you've read about 10-day lemonade cleanses, 7-day detoxes with green juices and Gwyneth's gruel. All you need to do, and this is perfect for Saturday or or anytime really, is a simple 1-day cleanse.
3) This “hidden survival muscle” in your body will boost your energy levels, immune system, sexual function, strength and athletic performance when unlocked.
4) I thought it was virtually impossible for a website to be able to tell me anything even a little bit insightful after only submitting my name and date of birth... I was wrong!
5) Turmeric is amazing. The problem is - It's hard to absorb!
6) Wonder why your stomach still sticks out even though you're hammering the core exercises every day? It's a common myth that bulging belly is due to weak abdominal muscles.
7) Even if you're the most active of athletes, you may still suffer from tight hip flexors due to the amount of time you spend each day planted to a chair.
Enjoy! Let me know how these work out for you. And if you run across anything I've missed please let me know.