🥇Top 10 Immune System Booster Products in 2021

This list is a compilation of our personal favorites, reader recommendations, and top sellers from the Facentials store to make a list for the Top 10 Immune System Boosters reviewed in 2021.

Today there are hundreds of Immune System Boosters to choose from. And we know how there are different factors people judge a product on.

So, after researching dozens and dozens of them, we were able to break them down to our Top 10 Immune System Boosters in 2021.

*Note*: This content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.

🥇Top 10 Immune System Boosters in 2021

1. MaryRuth Organics Elderberry Syrup Immune System Booster

Features & Benefits

• Over 453+ Positive Reviews 
• HIGHLY EFFECTIVE IMMUNE BOOSTER - MaryRuth’s Organic Elderberry will deliver delicious & potent support, while serving as the ultimate defense weapon for your vitally important immune system!
• PURE, SAFE & EFFECTIVE - MaryRuth’s Black Elderberry comes in a delicious blueberry/raspberry flavor & contains high flavonoid levels in a highly absorbable & quick-acting form. Safe & effective for everyday use, each serving size is 30 drops. Made for adults & kids, the entire family can reap the benefits of our great-tasting pure elderberry extract!
• SMALL BUSINESS, BIG HEALTH – Owned and operated by a passionate mother-daughter team. Enjoy healthy supplements formulated by culinary chef, nutritional consultant, and certified health educator MaryRuth Ghiyam.

Testimonial

"Elderberries are an amazing, ancient tool that people have been using for thousands of years to help promote health and wellness. Unfortunately, I don't live in a place where they grow locally so I decided to try MaryRuth's version. First of all, I've tried a bunch of things from this brand and I have genuinely loved all of them, making multiple repeat purchases for items that I've incorporated into my daily supplement routine.

This, like all of Mary Ruth's, is vegan and organic (HUGE plusses for me), made in small batches by a real company in the States. That's basically like hitting the jackpot if you ask me. Also, it tastes good. It tastes and feels real, not hopped up on a bunch of synthetic chemical flavorings and sweetened within an inch of its life. The consistency is great, not overwhelmingly syrupy and not crazy thin either. The product comes in a nice, amber glass bottle, which is meant to keep it nice and fresh, all while helping us cut down on our single-use plastics. Yay!

The big question I guess then is 'does it work?' to which I say, 'hopefully!' This winter has been brutal already (ugh!) but I haven't had even a sniffle since I started taking this. And I share a cubicle at work with a notorious sickie, so that in itself is amazing.
I'm at the end of bottle #1 and I'm about to order #2 to get me through the rest of this month of travel, sick relatives and late nights out with friends." - Kadie I.

2. Naturelo Premium Whole Food Vitamin C Immune System Booster

Features & Benefits

• Over 168+ Positive Reviews
• PURE, ORGANIC INGREDIENTS: each vegetable capsule provides 500mg of vitamin C from Organic Acerola Cherries. The supplement is also free of GMOs, soy, gluten, yeast, dairy, eggs, nuts, caffeine, coloring, preservatives, or flavoring.
• ENHANCED ABSORPTION: We've added Citrus Bioflavonoids from Organic Orange and Organic Lemon to enhance the bioavailability of vitamin C. Studies have shown that bioflavonoids increase the absorption of vitamin C by as much as 35%.
• IMPROVE SKIN HEALTH: Vitamin C is needed for the production of collagen, which prevents wrinkles on your face and reduces the signs of aging*.
• BOOST IMMUNITY: Vitamin C stimulates antibody production to aid the immune system in reducing the severity and duration of colds*.

Testimonial

"Best natural Vitamin C, which is derived from nature and body recognizes the natural form and absorbs better. it really works and especially in the flu season. I work in a hospital and around sick people, this keeps from getting sick and if I feel like getting sick, I do overload with vitamin c , like take 2 caps 3 times and in 24 hrs back to normal. Thanks to Naturelo for this excellent Vitamin C formula." - FG

3. Essential Oxygen Hydrogen Peroxide Immune System Booster

Features & Benefits

• Over 304+ Positive Reviews
• Contains One - 32 fl oz Bottle of Food Grade Hydrogen Peroxide
• It Works! The ultimate cleaner for 1st AID cuts and scrapes; BODY ears, throat and diffusers; HOUSEHOLD counters, surfaces, cutting boards, laundry, stains, toothbrush and baby gear; FOOD nuts, seeds, grains, veggies, fruit, meat, fish and chicken; PETS oral care and skunk odor; and PLANTS vase water and sprouts.
• It's Clean! Free of toxic stabilizers found in brown bottle peroxide. NON GMO. Great for homes with gray water systems.

Testimonial

"no noticeable smell and no fizzy bubbles like brown bottle version has when i spray some on dehumidifier coils or when i put some on my fingernail edges or when i poured some down dirty garbage disposal...i quite honestly started questioning if this brand was actually HP 3% or just all water. going to bathroom and putting a dab on my front gums/teeth quickly halted my questioning it, it slightly bubbled between my not yet brushed gums so nope not all water!!

i guess 'food grade' version, something i've never bought before now, is quite different than the brown bottles. i think i do prefer this one, it left no nasty taste in my mouth!" - Casper & Boo

4. Garden of Life Vitamin D3 Immune System Booster

Features & Benefits

• Over 221+ Positive Reviews
• IMMUNE SYSTEM SUPPORT: Support your immune system with 2,000 IU (500% DV) of certified vegan vitamin d3 and 10 organic mushrooms
• CALCIUM ABSORPTION: Use our organic vitamin d3 supplement to boost calcium absorption for bone health
• VITAMIN CHEW: It's a delicious chewable offered in an organic raspberry lemon flavor with no added sugars or stevia
• VEGAN VITAMIN D3: The mykind D3 chewable contains Organic and Vegan Certified vitamin D from lichen

Testimonial

"I was looking for a vitamin D supplement and I have to say, so far these are my favorite. They’re certified organic, vegan and they’re tasty. Also, they’re not expensive and they’re one of the cleanest vitamin D supplements I’ve ever seen so far.

Also, the guideline recommendation for adults trying to get their vitamin D levels back up, is 1,500 to 2,000 daily. So these can be taken daily. I personally don’t take them every day, I take them about every other day. For anyone taking supplements, be careful when supplementing with fat soluble vitamins, watch for the recommended dosage because you can over dose on fat soluble vitamins and always check with your doctor!

But anyway, these are great, I highly recommend!" - Joanne H

5. AirDoctor UltraHEPA Air Purifier Immune System Booster

Features & Benefits

• Over 49+ Positive Reviews
• AUTO SENSOR measures and adjusts filtration level instantly to air quality -- for True Air Control, Purification & Odor Control. You can also manually choose one of 4 filtration options.
• THE SMART CHOICE FOR YOUNG CHILDREN. ELDERLY, SMOKERS, PET OWNERS and those with allergies or breathing problems. Perfect in the kitchen, bedroom, or nursery. Purify your entire home or office quickly, large space or small with AirDoctor!
• PROFESSIONAL QUALITY AIR PURIFIER at an affordable price. Certified ENERGY STAR energy efficient air filtration system for added cost and energy savings. GO GREEN with a high quality, personal pure air filter & air cleaner system that delivers a massive punch! Amazon A-to-Z Purchase Protection, plus Air Doctor No-Hassle Return Policy with Super-Fast Shipping
• WHISPER-JET FAN for quiet operation – 30% quieter than traditional large or small room air purifiers.

Testimonial

"My mother just turned 74yrs old and has allergies. She lives in Georgia and with the turn of spring her allergies get really bad. And my father smokes cigarettes, so she's pretty miserable. I did some research on home air filters and The AirDoctor stood out big time. The name caught my attention, and its claims of cleaning the air of pollen and smoke made me feel secure it could help my mother so I immediately ordered it for her. Amazons shipping was timely, but we had a hard time getting the package from our local postal carrier so I contacted Amazon to let them know, and they sprung into action pretty quickly to resolve the issue. My mother now has the AirDoctor and set it up herself! She called to tell me how the Air Sensors worked. She's had it for about a week now and already feels a difference in the way she breathes. I'll continue to monitor this and update on whether or not she's still feeling relief but for now so far so good!" - Toney Larrell Reid

6. LiveWell Labs Nutrition Pro-45 Probiotics Immune System Booster

Features & Benefits

• Over 1,256+ Positive Reviews
• 45 Billion CFU Strength: We believe it is the best probiotics for women and men featuring 45-billion guaranteed live cultures and 11 clinically studied probiotic strains, per capsule! Includes NutraFlora Prebiotic Fiber to boost the growth of good gut flora and support overall gut health. This complete formula contains lactobacillus gasseri and lactobacillus acidophilus and many other essential probiotics.
• Dairy, Gluten, Soy, Preservative FREE: Each delay-release capsule is also non-GMO, certified vegan, made in America and does not require refrigeration.
• Bloat Relief: Backed by science. Bye, bye muffin top, hello safe and effective cleansing.
• Digestive + Immune Support: Our doctor-formulated probiotics establish and maintain favorable intestinal flora which is key for healthy digestion, bloat relief, constipation, leaky gut, weight loss and more.

Testimonial

"Like many out there, I, too tried dozens of different kinds, brands, and varieties of Probiotics. After having to increase the dosage of the one and only medicine I have to take, I started having major digestive issues. My doctor said those symptoms would subside, but they lasted over 2 months - I was miserable. I did a lot of research, and the most recommended remedies for my symptoms were ginger, peppermint tea, and a good probiotic.

The teas did a great job of keeping me hydrated and in soothing the ill-feeling in my stomach, but they didn't stop the worst of the symptoms. After reading about why this particular probiotic (and prebiotic) is so highly rated and recommended, I decided to order it. WOW. As recommended by one of the websites I consulted, I took my probiotic pill first thing in the morning on an empty stomach and allowed it to "do it's job" for about 20 minutes before eating or drinking anything else. Just TWO DAYS of this, and my digestive system felt normal! I was shocked, but mostly relieved.

NOTE: I figured I was "healed," and, after the first bottle was done, I didn't order another. My symptoms came back the very day I did not take the probiotic. I ordered more from Amazon, and as soon as I started taking it again, the symptoms went away. I guess I'll be taking this forever, which is fine with me. From what I've read, everyone should be taking a probiotic anyway - so many other great health benefits! But for me, this was truly a Godsend as it brought normalcy back to my digestive system and to my life!" - Sev's Mom

7. Medify Air Purifier Medical Grade Air Purifier Immune System Booster

Features & Benefits

• Over 398+ Positive Reviews
• Medical Grade H13 Filters (higher rated than True HEPA) 99.97% particle removal. H13 True HEPA is considered medical grade air filtration, the unit alone is not a medical device.
• Cleans a room up to 1,300 sq ft in one hour, 800 sq ft in 30 minutes, 400 sq ft in 15 minutes (CADR 330)
• Particle sensor built in with visible air quality indicator by color, CARB, Energy Star & ETL certified.
• Tempered Glass panel (like your cell phone, easy to clean, won't scratch like cheap plastic models), 4 fan speeds, 8 hr timer, night mode, ionizer function can be turned on/off

Testimonial

"I bought this because I have allergies. I like it so far, it has true hepa filte and I feel my allergy got better. When I first received this, I was cooking and I put this in the living room with my Alen air purifier together, Alen became orange right away because of cooking smoke, but medify didn't change color from blue. Perhaps because it's a small air purifier. So I tried to dust some clothes behind medify, and it became red right away LOL. So I know it works. It's good for my bedroom." - Lim&Keller 

8. iSpring RCC7P Boosted Performance Water Filtration System Immune System Booster

Features & Benefits

• Over 312+ Positive Reviews
• High Efficiency Reverse Osmosis system for safer, healthier and on-demand drinking water. This under sink mounted water filter and the best water softener removes up to 99% of over 1, 000 contaminants and hardness, including lead (removes up to 98% of lead), chlorine, fluoride, arsenic, asbestos, calcium, sodium, and more.
• 5-Stage gradient filtration produces great-tasting purified water every time you turn on the faucet right at your kitchen counter – even better than most bottled water. Enjoy crystal clear ice cubes, fresher tea and coffee, better tasting foods, healthier baby formula.
• Premium quality components ensure highest reliability and low maintenance for many years to come. Clear see-through 1st stage housing makes filter inspection a snap.

Testimonial

"For those that don't read instructions carefully, remember to run the filter without the membrane for a minute or three to break in the carbon filter and get rid of all the loose black carbon material without sending it through the membrane.

I really value what this has done for my well water quality. The pump is small by comparison to options someone might purchase additionally, but it seems to work well in spite of it. The automatic shut off and activation valve that detects when to refill based on tank fill level seemed a bit stiff at first, like it didn't turn on until the tank pressure dropped really low, but it seems like it eventually 'broke in', and it refills more regularly now, keeping the water pressure to my fridge outlet sufficiently high.

My biggest gripe is that the documentation for the product wasn't entirely up to date with the package contents, although the documentation is very very robust. Most notably, the package contained an automatic shut off valve for leak detection, but it wasn't mentioned anywhere in the documentation (and I elected not to use it since it seemed like a piece of junk); for the longest time, I couldn't figure out what it actually is or what it does. It took a very long time for me to install, but it couldn't get much easier to install for what it is and what it does. I'm grateful for all of the extra online info in addition to the package documentation." - scradam

9. NaturaLife Labs Activated Charcoal Immune System Booster

Features & Benefits

• Over 480+ Positive Reviews
• SUPERIOR POTENCY 1200 MG: our organic activated charcoal delivers 1200 mg per serving with 100 vegan capsules making it the most potent formula available on the market.
• ORGANIC ACTIVATED CHARCOAL: Derived from 100% organic coconut shells with maximum absorption.
• SUPERIOR QUALITY: We take pride in providing you 100% pure activated charcoal which does NOT CONTAIN fillers, magnesium stearate, dioxides, preservatives, gluten, soy, sugar, yeast, starch, non-mo
• Manufactured in a FDA registered facility in accordance with Good Manufacturing Practices (GMP)

Testimonial

"I have food allergies and intolerances. I use this for when I eat something I shouldn't have.
It works really good, it is stronger than what I was getting at my local grocery store.
When I go on vacation and I can't control my food as closely, I take 2 capsules before I eat. Really helps.
If I'm at home and I have a food reaction ,I take 4, and it will pass through my body more quickly.
If I didn't take this I can be sick up to 4-5 days. Migraines, chest pain, organ pain, fainting ,brain fog, vertigo, are some of my symptoms from my food allergies.
These help tremendously." - jenifer nichols

10. Enterosgel Cleansing The Gut Immune System Booster

Features & Benefits

• Over 2+ Positive Reviews
• Total body detox based on organic silica
• Helps to prevent toxic and allergic reactions, traveller's diarrhea, hangovers, reduces toxic load on liver and kidney
• Used in adults and children in the condition of acute or chronic diarrhea of any cause (bacterial, viral, retroviral, food poisoning)
• Free from sugar, sweeteners, gluten, lactose, fat, color, flavor, preservatives

Testimonial

"This colorless tasteless natural compound truly is a Godsend for those of us suffering with digestive issues because of irritated lining tissue. This can coat so healing can occur. I take it before I am going to eat anything that I think might irritate the issue, and this stuff protects it. Also, if you have chronic diarrhea, this stuff will check it in a day if you follow the instructions on the dosage. It is NOT absorbed by the body at all. It is completely excreted taking toxins out of the body with it." - Likesgoodthings 

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