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Best Immune System Boosters: Prevent Cold & Flu with Vitamins + Antioxidant Defense

Best Immune System Boosters (first star 4)

Your immune system is critical for ensuring your survival; it serves as the first line of defense against diseases, bacteria, and other viruses that may create damage in your body. It is an intricate system that identifies and destroys abnormal cells, clearing your body of any pathogens to keep your body in a state of homeostasis. Basically, it’s always on alert to keep you healthy.

There are many immune boosters present in the foods you eat, and if you’re not keeping a watchful eye on all the ingredients in your daily meals, you may be deficient when it comes to the vital nutrients and vitamins your body needs to ward off illness. This is where immune boosters come in. They’re packed with the vitamins, antioxidants, and anti-inflammatory components your body needs to keep colds and flu symptoms from taking over and rending you immobile in bed for days or weeks.

Below, we share our top five immune boosters and include details about their ingredients so you can make the best choice when choosing an immune booster to assist with your overall health.

Top 5 Summary

  1. Immune Support - Editor’s Choice
  2. Immune Defence - Top Products for Families
  3. Immune Complex - Best Vegan Friendly Supplement
  4. Turmeric & Ginger - Ideal for Superfood Boost
  5. Mushroom Defense - Best for Immune & Cognitive Support

How Did We Make This List?

When it comes to choosing a solid immune boosting product, there are several considerations we had to think about. Mainly, we’re looking for transparency when it comes to ingredients and positive experiences detailed by consumers. Below, we list what we took into consideration when putting this top five list together.

  • Reviews and Comments

Consumer reviews and comments detail personal experiences, which provide us with a look into their experiences with the immune boosting products. Positive reviews confirm the promises of the products, while less than stellar reviews provide an in-depth look of what areas could use improvement. We only chose products with reviews and comments that are overwhelmingly positive.

  • Product Descriptions

How well each brand describes their products is of paramount importance. As a consumer, you should understand why the product was created, what ingredients it contains, and how each of those ingredients supports your immune system. We look for transparency in this area.

  • Ingredients List

We look for products that have a clear ingredients list and don’t try to sneak in fillers or synthetic ingredients. Each ingredient must serve a purpose and the product formulations should keep your overall health in mind, without cutting corners through the use of unnecessary components.

Immune System Boosters: In-Depth Product Reviews

1. Immune Support - Editor’s Choice


  • Made in the USA
  • Sourced from GMP certified facility
  • Non-GMO
  • Lab-tested
  • Save with bundle purchases


  • Not appropriate for pregnant or nursing mothers

Enjoy an array of botanical extracts in VitaPost’s Immune Support dietary supplement to gain the nourishment your immune system deserves. This is an everyday supplement that uses advanced herbal extracts along with antioxidant support to support your wellness. The primary ingredients in Immune Support include:

  • Vitamin E and Green Tea

Vitamin E is a strong antioxidant that works alongside your immune system to keep your system thriving, no matter your age. Green tea extract is also a powerful antioxidant that supports your immune system function while boosting your body’s other antioxidants as well.

  • Beta-Glucans and Graviola Leaf

Beta-glucans are the harmless sugar-chains that occur naturally in fungi and bacteria. Since the body recognizes these as pathogenic, it is able to build resistance to beta-glucans when they are introduced into the body. This is how beta-glucans work to support your immune system. The Graviola leaf is also known to support your immune system, so you get double the support with these two ingredients.

  • Mushroom and Herbal Complexes

With a combination of Reishi, Maitake, and Shiitake mushrooms, this formula boosts both immune and antioxidant properties.

Immune Support’s formula is well-rounded, incorporating ever-important antioxidants that fight free-radicals and oxidation while also utilizing the benefits of herbal extracts to support your immune system. Their formulation includes a powerful list of beneficial ingredients to power your immune system and keep it strong, fighting against diseases and pathogens that may cross your path at any point.

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2. Immune Defence - Top Products for Families


  • 100-day money back guarantee
  • Premium quality ingredients
  • Free worldwide shipping
  • Vegan friendly


  • Some people may not enjoy the taste of the lozenges

Immune Defence offers support for your whole family, providing healthy supplements for men, women, and children over four years of age. They have three main products:

  • Immune Support Gummies for Kids

These gummies are suitable for children four years and older and are formulated with elderberry, zinc, and vitamin C. They taste like berries, which makes them an easy to chew, tasty treat for your little ones. These are especially important for your child’s growing years because it helps boost their immune system and they’re yummy, so you won’t have to fuss with little ones about daily doses because they’ll look forward to the flavor. These gummies are great for year-round care, especially during flu season, when most of their peers are catching bugs at school and daycare.

  • Immune System Support Lozenges

These zinc lozenges are complemented with rosehip and acerola to not only support your immune system, but help you recover if you happen to catch a cold. They can be taken by children twelve years and older and provide vitamins A, C, and E to power your immune system and improve your recovery time should you fall ill. They taste like aniseed and are quick to dissolve on your tongue. They’ll soothe your throat on the way down too. No matter if you’ve gotten sick and want to kick it quick or if you want immune support strong throughout the year, these lozenges are great to have on hand because of their vital immune-boosting nutrients.

  • Immune Support Plus Capsules

These capsules contain elderberry, zinc, vitamin C and vitamin D to keep you in good health throughout the year. All you need is one capsule per day to keep your body supported because they contain 425mg of elderberry, 35mg of zinc, and 90mg of vitamin C - which is considerably more than other similar products available on the market.

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3. Immune Complex - Best Vegan Friendly Supplement


  • Third party lab tested
  • Non-GMO
  • Sourced from a GMP certified facility
  • Vegan friendly


  • Only available in capsule form

Immune Complex offers veggie capsules that help you incorporate more vitamins, botanicals, and zinc into your regular diet. The herbal extracts work wonders to provide nutritional support that strengthens your immune system. This product contains three main ingredients, including:

  • Elderberry

Elderberry is the name commonly used when referring to the Sambucus tree, which is a tree grown all over the world for its health advantages. Elderberries are packed with antioxidants and they support your immune system to encourage your best health.

  • Turmeric

Turmeric has an earthy flavor and it’s often used in curries, where it colors the food a deep yellow. It provides potent antioxidant benefits, it supports your immune system, and it has a strong anti-inflammatory effect.

  • Echinacea

Echinacea is a beautiful flower that has been used within Native American wellness traditions for ages. It hosts tons of beneficial compounds, including antioxidants. When paired with vitamin C, it’s the perfect boost for your immune system.

In addition to the above ingredients, Immune Complex also contains garlic, vitamin C, vitamin E, zinc, and vitamin B6 for a full range of benefits that are especially vital for a well-functioning immune system. Vitamin C, for instance, is necessary for your wellbeing while vitamin E serves as a strong antioxidant that fights against free radicals. When formulated together, all these key nutrients provide well-rounded care for your immune system.

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4. Turmeric & Ginger - Ideal for Superfood Boost


  • High quality ingredients
  • Made in the US
  • Includes BioPerine®
  • Supports joint and muscle health


  • Only available in capsule form

Turmeric and ginger are a complementary match of two roots that create the ideal superfood blend. Not only do turmeric and ginger support a healthy immune system, but they also support joint health. This product contains three primary ingredients, including:

  • Turmeric

The root of turmeric has gained massive popularity all over the globe, due to its reputation for assisting with respiratory system health, joint health, and even alertness. It is a well-known part of the Ayurvedic tradition for all its healing and health-boosting properties.

  • Ginger

Ginger is another superfood often used by those who are health conscious. It brings comfort to upset stomachs and supports joint health, all with a distinctive, alluring flavor enjoyed by many.

  • BioPerine®

BioPerine® refers to the extract of peppercorn and long pepper and is a patented formulation. The chemical name for this extract is piperine, and you’re probably familiar with the taste of this pepper, as you likely incorporate it into many of your home-prepared meals. Piperidine is known for its ability to enhance absorption of some nutrients, particularly curcumin. It makes turmeric that much more powerful.

Turmeric is commonly used because of its beneficial effects, but unfortunately, its absorption rate can be low on most occasions. That’s why BioPerine® is such an essential addition to this formula; it ensures you’re getting more of the benefits associated with turmeric. Ginger, often consumed within beverages, offers massive relief if you’re experiencing digestive comfort. It’s a welcome superfood in any household. In addition, it supports your immune system to aid with your overall well being.

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5. Mushroom Defense - Best for Immune & Cognitive Support


  • 10 power-packed mushrooms in one capsule
  • 67 day returns (no questions asked)
  • 24/7 dedicated support


  • Free shipping only on select packages

Mushroom Defense is an immune protector, along with a defender against cognitive decline and fatigue. This unique formula not only protects against bacterial and viral threats, but it also enhances your energy while sharpening your focus and helping your memory. This innovative 10-fold mushroom complex includes the following:

  • Shiitake Mushroom Extract

This extract contains vitamins, minerals, and other health-boosting compounds. Plus, it also contains Lentinan, which is a chemical compound that protects your DNA from oxidative destruction. Shiitake contains antiviral and anti-bacterial properties which strengthen your immune system, help reduce inflammation, and support cardiovascular health.

  • Chaga Mushroom Extract

Chaga is known for its immune boosting properties, including its antioxidants, and has been used as a coffee replacement, even though it is caffeine-free. Chaga helps your immune system function better while also delivering anti-aging support and improving mental clarity. Plus, it promotes liver health and serves as an anti-inflammatory.

  • Reishi Mushroom Extract

Reishi is known as the “Divine Mushroom” in Chinese. This mushroom is filled with immune boosting benefits, but also helps combat fatigue and inflammation. In addition, it promotes cellular health and increases NK cell activity, which assists with the containment of viral infections.

  • Turkey Tail Extract

This mushroom gets its name from its appearance because it closely resembles the tail of a turkey. It’s equipped with immune boosting benefits and also aids gut health, promotes respiratory health, and even fights fatigue.

  • Lion’s Mane

Lion’s mane is a mushroom with unique cognitive enhancing compounds. It serves as a protectant against cognitive decline, it helps improve focus and memory, and it even promotes gut health along with its immune boosting properties.

  • Maitake Mushroom Extract

Maitake mushrooms contain adaptogens, which are properties that assist in the regulation of all the systems in your body. They are rich in antioxidants, contain anti-viral properties, and even help with weight loss - all while enhancing your immune system cells.

  • Royal Sun Agaricus Extract

These mushrooms are from Brazil and have been researched for 50 years. They boost your immune system, fight viruses, are packed with antioxidants, and support your cellular health.

  • White Button Mushroom Extract

White button mushrooms are the most popular mushrooms seen around the world and they protect your DNA from oxidative damage, which not only helps with your physical appearance, but also helps with maintaining mental clarity as you age. These mushrooms improve cellular survival and assist with eliminating threats to your immune system.

  • Black Fungus Extract

Though the name of this mushroom may sound off-putting, it’s been used traditionally for years because of how loaded it is with antioxidants and how well it supports your immune system. In addition, it improves your gut health, protects against cognitive decline, and reduces inflammation.

  • Cordyceps Sinensis Powder

These powerful mushrooms have a hefty price tag at around $9,000 USD per pound. They increase energy levels, contain anti-aging properties, and they support immune function. In addition, they’re packed with antioxidants and are known to enhance NK cell activity.

Mushroom Defense is unique because they incorporate both mycelium and fruiting bodies. Mycelium refers to the roots that live underground while fruit bodies are the mushroom pieces that live above ground. Incorporating both into this formula gives you all benefits offered by full mushrooms. Some of these benefits include:

  • Steady, All-Day Energy

If you regularly experience a midday crash or have trouble waking up in the morning, you should know it’s not normal to experience this. With proper nutrition, your days should be filled with steady energy without caffeine or other stimulants. When you supplement daily with Mushroom Defense, you experience what it feels like to wake feeling refreshed and go about your day without the need for coffee or an afternoon nap.

  • Improved Cognitive Function

Sometimes the word is on the tip of your tongue, but it just doesn’t come to you. Other times, you may forget an important event or appointment and wonder how that was even possible. When you experience cognitive issues, it can be incredibly frightening and frustrating. With Mushroom Defense, you experience more mental clarity, which means you can focus for longer periods and your memory is improved.

  • Boosted Immune System

Mushroom Defense is a mushroom complex that gives your immune system a gentle helping hand. This is especially helpful if you suffer from seasonal allergies, as your immune system hops into overdrive to protect you against allergenic invaders. While allergies are your immune system’s natural response to fighting against pollen, with a boosted immune system, your reactions to allergens are not nearly as severe.

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What are Immune Boosters?

Immune boosters are foods and supplements that keep your immune system in top shape, saving you from frequent colds, keeping you healthy during flu season, and helping you ward off infections. Below, we list a couple of well-known immune boosters:

  • Garlic

Garlic is a welcome ingredient in most dishes and it’s one of the most beneficial foods to add to your regular diet to keep you in good health. Garlic is known to not only combat infections, but it is also helpful in slowing down the hardening of your arteries and boosting your immune system to keep you in a state of wellness.

  • Red Bell Pepper

Red bell peppers are packed with Vitamin C and are a rich source of beta carotene, which is an antioxidant that supports cognition. Beyond serving your immune system, red bell peppers also help you maintain healthy skin.

  • Citrus Fruits

Vitamin C is known to strengthen your immune system, and it’s why many flock to it at the first sign of a cold. Vitamin C powers up white blood cells, which keep your body in the fight against any kind of infection. Since your body doesn’t produce vitamin C on its own, you need the daily boost to keep your immune function in great shape.

  • Ginger

Ginger is another common go-to following illness. It helps to decrease inflammation and soothes sore throats and nausea. It has additional benefits, like lowering cholesterol and helping to alleviate chronic pain.

  • Spinach

Spinach is also rich in vitamin C and it is filled to the brim with antioxidants and beta carotene, which keep your immune system ready to fight any infection that tries to take hold inside your body.

  • Turmeric

Turmeric is known for its delightful, yellow color and it is often used in dishes for its anti-inflammatory properties. It is also rich in curcumin, which boosts your immune system and has anti-viral properties.

  • Green Tea

Green tea is known for its antioxidants and works to increase immune function.

  • Papaya

Papaya, like citrus fruits and spinach, is a powerhouse fruit loaded with vitamin C. It also has anti-inflammatory properties to benefit your overall health.

Natural Immune Boosters

Your immune system helps with regulating your body and it’s designed to ward off illnesses and diseases. There are several methods for boosting your immune system naturally, and each is easy to incorporate into your regular schedule. Ensure you are incorporating all of the following into your daily routine to keep your immune system functioning optimally:

Enjoy Nutrient-Dense Foods

Maintain a balanced, healthy diet to boost your immune system. Eat whole foods like vegetables, fruits, and meats, to enjoy the benefits of the nutrients they offer. You should also incorporate healthy omega-3 fatty acids, which can be found in avocados and eggs. Not only does a well-balanced diet keep your immune system functioning well, but it also keeps you in a healthy weight range, which is optimal for good long-term health.

Always Stay Hydrated

When you make sure you’re always well hydrated, you are giving your body the immune system support it needs. Skip the sugary drinks and opt for water instead. Drinking plenty of water helps with your digestive system and supports all of your body’s regular functions.

Incorporate Exercise

To keep your immune system healthy, you should be prioritizing exercise. Choose a moderate intensity for your workouts; the point is to get your heart rate up on a regular basis. Don’t overdo it, especially when you’re already feeling something coming on, because if you overexert yourself while your immune system is fighting off illness, you could lower your immune response.

Nightly Rest

Your body needs a good sleep schedule with deep rest to function optimally. Try to maintain the same bedtime and the same wakeup time, even on your days off. This allows your body to regenerate overnight, so you wake feeling rejuvenated. Your immune system benefits from your sleep cycles, so don’t skimp on your rest.

Supplement with Vitamins

Vitamins are helpful immune boosters that complement the nutrients you receive from the whole foods you consume. Keep your diet clean, with a balanced number of fruits, vegetables, proteins, and healthy fats, and supplement with vitamins and other superfoods to keep your body going strong.

What Weakens the Immune System?

Just as there are ways to boost your immune system, there are actions you take that could cause the complete opposite effect and leave you vulnerable to illnesses and diseases. Avoid the following to keep your immune system healthy.

Excessive Sugar Intake

If you have a sweet tooth, you must be mindful not to overdo it. Sugar is addictive and it can be tough to say no to your favorite decadent desserts. But when your sugar spikes, your immune system is suppressed. And when your immune system is suppressed, you are more likely to catch a cold or flu virus.

Poor Diet Choices

Above we discussed the importance of incorporating whole, nutrient-dense foods into your diet. Cheeseburgers and pizza, though easy to get and often delicious going down, just don’t cut it. Avoid foods with poor nutritional value and stock your refrigerator with all the good stuff so when a craving hits, you can make a good choice that supports your immune health.

Excessive Alcohol Consumption

You may love a good happy hour out with friends or co-workers, but excessive alcohol consumption is also a culprit that weakens your immune system. Limit your alcohol intake to keep your body at its peak.

Sedentary Lifestyle

Exercise is an important component of any healthy lifestyle. You may not have control over certain portions of your day if you work behind a desk; however, you should incorporate movement during your lunch breaks and after work to get your heart pumping and keep your immune system healthy.


Water gifts you with many benefits, including improved cognitive function. When you’re dehydrated, you may experience fogginess, mood changes, and even constipation. Hydrate sufficiently every day to keep your body, including your immune system, in perfect working order.

Poor Sleep Schedule

If your sleep schedule is erratic, your body doesn’t have any predictable way of knowing when it gets a chance to recharge. This can increase the level of cortisol in your body, which is a stress hormone, and stress has a negative impact on your immune system. It can also affect other hormone levels such as testosterone and estrogen. Pick your sleep schedule and stick to it every night.

Benefits of Immune Boosters

Immune boosters, depending on their ingredients, are loaded with many benefits for your overall health, such as:

  • Anti-viral properties to help ward off illnesses
  • Shortening the duration of bacterial and other infections
  • Supporting the body in the fight against any infection
  • Can assist with pain reduction due to anti-inflammatory properties
  • Supporting the respiratory system
  • Supporting gut health
  • Antioxidant support to fight free radicals


Immune boosters are just one component to a healthy lifestyle. When you incorporate an immune booster into a lifestyle that prioritizes your health, including a well-balanced diet and regular exercise regimen, you can bask in all the benefits they offer.

Try Immune Support to garner the benefits of botanical properties. Boost your entire family’s health with Immune Defence or try Immune Complex for a vegan-friendly immune boost. If you’re drawn to superfoods, try the Turmeric and Ginger supplement and if you want to enjoy the cognitive and anti-aging benefits of a unique 10-mushroom compound, opt for Mushroom Defense.

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