Can Vitamin C actually protect you against the flu virus or even the current
coronavirus? Are you taking enough of vitamin C? From the dozens of different
brands and products, which one should you choose?
Vitamin C is an
essential nutrient which cannot be produced by humans (
Nutrients. 2017). Because your body doesn't produce or store it, you need daily vitamin C
for continued health. Vitamin C may be one of the most well-known
immune nutrients that protect against immune deficiencies and which supports
the prevention and recovery from the common cold and upper-respiratory issues,
and also protects your cardiovascular system, eyes, skin, and other parts of
your body.
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SOMMAI/ Shutterstock
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Vitamin C is a particularly unique nutrient because it also functions as
an antioxidant that protects your cells against potential damage (
Source).
As of April 2022, there are more than 40 studies that have been published to investigate the benefits of vitamin C against COVID-19. Check out the evidence tracker on vitamin C and COVID-19 from
c19vitaminc.com (constantly updated).
Vitamin C might help prevent COVID-19 and also lessen the inflammatory
reactions behind some severe COVID-19 cases, according to a
review of research on the topic published in the latest issue of the journal Nutrition.
Vitamin C can be found in a variety of whole, plant-based foods like
citrus fruits, bell peppers, strawberries, and broccoli. Obtaining
nutrients from whole foods is always the best approach, but if you have
difficulty meeting your nutrition needs for any reason, a supplement may
be necessary.
Benefits of vitamin C
Vitamin C plays an essential role in the body. Thanks to its antioxidant properties, it has been found to have several benefits, particularly for skin and immune health.
Found concentrated in the skin, vitamin C boosts collagen production and helps protect from UV damage (
Trusted Source).
The most commonly known benefit of vitamin C, though, is for immune health, particularly as it relates to the common cold.
Some research has found that supplementing with vitamin C can shorten the duration of a cold and may help prevent and treat other infections, such as tetanus and pneumonia. But more human studies are needed (
Trusted Source).
Additionally, a systematic review found that vitamin C supplementation was effective in lowering blood pressure in people with hypertension (
Trusted Source).
Preliminary research also suggests that vitamin C has anticancer properties and that a high dose supplement could potentially be used as an alternative treatment in people with cancer (
Trusted Source,
Trusted Source,
Trusted Source).
Other research has been investigating the use of vitamin C supplementation in people with stress-related disorders, such as depression and anxiety, because it has been shown to help improve mood. However, more research is still needed overall (
Trusted Source).
How to choose a Vitamin C Supplement
Selecting the right vitamin C supplement depends on a variety of factors, including the form, quality, dose, and price. There are many forms of vitamin C available (ascorbic acid, sodium ascorbate, calcium ascorbate, liposomal vitamin C etc.) but there is not much evidence that one form is much better than another.
The ascorbate forms may be easier on your stomach, but you will still run a risk of developing loose stools at too high a dose.
You can also start by considering how you’ll be using the supplement. For instance, if you prefer to take a pill, you’ll want to check out encapsulated vitamin C supplements.
If you don’t like swallowing pills or want to mix it into beverages, your best bet is to consider liquid or powdered supplements.
Next, you want to check the supplement’s quality. Evaluate whether a brand is reputable by exploring their ingredient sourcing and manufacturing standards. A good product will also be tested by third-party organizations, such as USP, Consumer Labs, or NSF International.
Take a look at added ingredients, too. If you’re trying to limit your intake of added sugars, you want to opt for a supplement that doesn’t contain sugar.
Another factor to consider is the dosage. The recommended daily amount of vitamin C for adults is 90 mg for men, 75 mg for women, and up to 120 mg for women who are pregnant or breastfeeding. However, certain medical conditions may require that you take much higher doses (NIH).
Children have lower vitamin C requirements, which range from 25–75mg per day, depending on their age. However, it’s not generally advised to give children a vitamin C supplement unless their pediatrician has recommended it.
Note that the Tolerable Upper Intake Level (UL) for vitamin C for men, as well as women ages 19 and above, is 2,000 mg. Meanwhile, the UL for children ranges from 400–1,800 mg, depending on age. Daily intakes at or below these amounts are unlikely to result in any adverse health effects (NIH).
Vitamin C supplements come in a wide range of dosage options. If you’re looking for a high dose, it may be more economical and convenient to find a concentrated supplement. This way you won’t be stuck consuming multiple servings of a lower dose option.
Generally, high doses of vitamin C are unnecessary and could contribute to harmful side effects. Only consume high doses if your healthcare provider recommends doing so.
Finally, you want to consider your budget. Some professional-grade brands can be expensive, but keep in mind that a higher price doesn’t necessarily mean a better product. There are plenty of high quality options available at various price points.
Best vitamin C supplements of 2022
The supplements on this list were chosen based on
quality, manufacturing standards, usability, and price.
Here
are the best vitamin C supplements of 2022.
1. Best Tablet Vitamin C Supplement
1. Nature’s Bounty Vitamin C + Rose Hips, Immune Support, 1000mg
Customer Reviews: 4.8 out of 5 - more than 30,000 global ratings.
Nature’s Bounty is a supplement company that’s maintained a strong reputation for quality for decades.
Each chewable tablet provides a dose of 500 mg of vitamin C, along with rose hips to help boost your intake of antioxidants (
Trusted Source).
Nature’s Bounty holds itself to a high standard when it comes to ingredient sourcing and manufacturing, and each product is tested multiple times throughout the manufacturing process to ensure purity, quality, and strength.
The company’s manufacturing facilities have also been audited by third-party agencies, including USP and Specialized Technology Resources.
2– 4. Best capsules
Capsules are the most popular form of vitamin C supplements. These are
among the best on the market.2. Smarter Raw Whole Food Vitamin C
- Vegan, Real Immune Support
- 60 Vegan Capsules
- 100% Made with 11 Premium Raw & Natural Whole Food Berries such as
Acai, Acerola, Amla, Cranberry, Goji, Jabuticaba, Mangosteen, Maqui,
Pomegranate, Strawberry, & Schisandra.
- Lack of Vitamin C can cause Collagen loss leading to wrinkles, aging,
weakened arteries, and immune system. Stress can cause Vitamin C
deficiencies too.
- Not a synthetic Vitamin C supplement
- Natural Full Spectrum Citrus Bioflavonoids, Polyphenols &
Antioxidants.
- Made in the USA
- No Fillers, Magnesium Stearate, Dioxides, Silica, Maltodextrin,
Carrageenan, Soy, Milk, Egg, Corn, Tree Nuts, Artificial Colors, or
Preservatives.
This product is exactly what I was looking for! I'm a Certified
Health Coach and the source of vitamins and what's in them (read the
ingredient list) are both of the utmost importance to me. Finding a
Non-GMO Whole Food Vitamin C that didn't contain harmful chemicals
such as magnesium stearate, silica, dioxides, maltodextrin, soy,
carrageenan was SO IMPORTANT. Because of the purity of this brand, I
will definitely recommend these Vitamin C supplements to clients.
Supplementing with Vitamin C is crucial, but especially when our
immunity may be at risk of being compromised, like during the cold and
flu season. Additionally, these provide antioxidants, substances found
in certain plants and fruits, that help stop free radicals from
causing cell damage in your body. I'm loving this Non-GMO Whole Food
Vitamin C!!
4.7 out of 5 - 2,285 global ratings
3. Viva Naturals Vitamin C

- Non-GMO Vitamin C Supplements with Citrus Bioflavonoids & Rose Hips for Immune Support & Antioxidant Protection
Features Non GMO Vitamin C
Our C vitamin contains premium Quali-C from Scotland, made by one of the world’s leading providers of this essential nutrient. Each batch is third-party tested for quality, providing 1000mg of vit C per serving.
Vitamin C With Bioflavonoids & Rose Hips
Protect yourself all season long with our specially formulated vitamin C 1000mg vegetarian capsules.* Complementing fruit extracts like citrus bioflavonoids and rose hips provide natural sources of vitamin C and work synergistically to support a healthy immune system.
Supports Collagen For Hair, Skin, Nails & Joints
Often going under the radar, vit C is an essential nutrient for collagen synthesis.* Collagen is the holy grail of beauty and joint support, and adding a high quality ascorbic acid like Vit C 1000mg to your wellness routine can help your body make more of it.
Non GMO Vitamin C 1000 & Veggie-Friendly
Our vitamin C capsules are non GMO and vegetarian friendly, making them an easy addition to any wellness practice or dietary lifestyle. Not to mention they’re manufactured without artificial dyes, salt, soy or dairy, so you can feel confident that you’re getting the most out of your vitamin C pills!
As a diabetic of 43 years, I've done pretty well. I can still see and pee and have all my feet and toes. I recently learned how high dose vitamin C can get rid of those age spots that mar our complexion as we get older. I had a big dark spot on my face go away and today I looked down at my feet and one of two scars was gone and the other was going. They had been there for several years. and They say diabetics don't heal well. Our bodies need Vitamin C to make collagen and to keep our skin healthy we all need more than the RDA, but Diabetics even more so. Diabetics use up our vitamin C quicker than most other people and it is a strong anti-oxidant. Even though I am doing fairly well, I did have a heart attack 10 years ago. My arteries were brittle and since I wasn't taken vitamin C at that time, my body didn't have the materials to repair and keep my arteries flexible. I take this C and I also take another Liposomal Vitamin C 1:1. I have taken up to 40,000 mg in a day spread out throughout the course of the day. Like 2,000 and hour. No ill effects and with some pleasant surprises such as I described.
4.7 out of 5 - more than 7,000 global ratings
4. Nutra Champs Vitamin C

NutraChamps’ naturally sourced, vegan, non-GMO Vitamin C supplement comes in convenient, easy to swallow capsules so that you don’t need to guzzle down sugar-rich juices to get your dose of this essential nutrient.
NutraChamps’ premium formula didn’t just include L-Ascorbic Acid, the naturally occurring form of Vitamin C. Loaded with Elderberry, Citrus Bioflavonoids & Rose Hips, NutraChamps also delivers key antioxidant essentials to ensure you get more out of every dose.
Furthermore, Collagen is vital in ensuring the health of our hair, skin, nails, joints and connective tissue — but without the right amount of Vitamin C, the body can’t actually produce or store collagen. This makes taking the right dose SO important. With NutraChamps, you’ll get the doctor recommended dose and exactly what your body needs to thrive.
- Vitamin C 1000mg with Elderberry, Citrus Bioflavonoids & Rose Hips
- 120 Capsules
- Vegan, Non-GMO
- Antioxidant Supplement for Immune Health & Collagen Production
- Powerful antioxidant : Not only is Vitamin C an important antioxidant by itself, but it has also been shown to regenerate other antioxidants within the body. Add Elderberry, Citrus Bioflavonoids and Rose Hips to the picture and you’ve got an immune support boosting, antioxidant powerhouse!
I like everything about this new Nutra Champs supplement - the right dose, the right combination of complementary ingredients, vegan, non-GMO, easy swallow capsule, all aspects are excellent.
I like splitting my supplements morning and afternoon. I think it gives better, more even protection. The 500 mg capsules provide that and are a bit easier to swallow.
Besides the L-Ascorbic Acid, each capsule includes Elderberry, Citrus Bioflavonoids and Rose Hips. Good complements without sweeteners and flavor enhancers like you might get with tablets.
I'm on a plant based diet so finding high quality vegan supplements requires a capsule without gelatin. Nutra Champs always provide that for me. Ingredients are also not genetically modified.
This is a great way to get your vitamin C!!
4.7 out of 5 - 2,102 global ratings
5 - 6. Best Chewable Vitamin C Supplement
5. NOW Foods’ Chewable C 500
If you’re not a fan of swallowing pills, NOW Foods’ chewable vitamin C
tablets may be the product for you.
NOW Foods is a reputable brand that produces a variety of affordable, high
quality nutritional supplements. Each orange-flavored tablet provides a
500-mg dose of vitamin C and contains just 1 gram of added sugar. They’re
also 100% vegan and free of major allergens.
NOW Foods prides
themselves on their meticulous testing protocols. Each supplement is
tested in-house for purity and potency, and all of their manufacturing
facilities are certified by the Food and Drug Administration (FDA).
I like the taste of slightly sour, so if you don't like that, maybe you
won't like them. But they are better to chew than any other chewable
vitamin C I have tried. I suddenly have more energy too. I wonder if
it's the vitamin C?
4.7 out of 5 - 724 global ratings
6. Puritan's Pride - Chewable Vitamin C with Rose Hips Chewables
- Chewable Vitamin C-500 Mg with Rose Hips Chewables, 90 Count
- Highest quality vitamins and supplements
- Scientifically formulated
- Supports immune system health
- Gluten and Soy Free
- 45 to 90 day supply
These are very easy to chew and since I can not swallow normal dice
vitamins do to surgery on my throat. The taste is also good.
4.6 out of 5 - 690 global ratings
7 - 8. Best Gummies
Gummy vitamins are one of the hottest trends in nutrition supplements — and
understandably so. Whether you’re a kid — or a kid at heart — taking your
vitamin C has never been easier or more delicious.
However,
although gummy vitamins are convenient and taste great, they should not be
confused with candy. It’s important that you don’t exceed the recommended
dose, as too much vitamin C could lead to unintended side effects. Like
other supplements, be sure to store them away from little ones to avoid a
potential overdose.
7. Carlson Labs’ Kid’s Vitamin C Gummies
Carlson Labs’ vitamin C gummies for kids are a great option if you’re looking
for a quality supplement specifically designed with your children in mind.Each
orange-flavored gummy provides 125 mg of vitamin C and contains only 2 grams
of added sugar. They don’t harbor any artificial colors, sweeteners, or
preservatives and are 100% gluten- and soy-free.
When it comes to quality, Carlson Labs has been an industry leader since
1965. All of their products are manufactured in an FDA-certified facility
and come with a purity and potency guarantee.
These gummies are good immune support and also taste great. My kiddo
loves these. No bad taste.
4.7 out of 5 - 47 global ratings
8. Purify Life Vitamin C Gummies for Adults & Kids
- Double Strength Immune Support
- Chewable
- Vegan, Gelatin Free, Gluten Free
- Defense Booster Supplement Replaces Capsules, Pills, Tablets & Syrup
- 90 Gummies : 3 Month Supply for Kids, 45 Day Supply for Adults
- Our Vitamin C Chews are 125mg per gummy and 250mg per serving of
adults.
- Help reduce the cough, cold, allergies, congestion, and respiratory
function issues
- Support your body tissue growth & repair, digestion, iron
absorption, high blood pressure management, collagen formation. Boost
development of stronger bones, cartilage, and teeth.
- Completely safe for toddlers, kids, and adults.
- Vitamin C is loaded with antioxidants, and will allow your body’s
natural defenses to fend off unwanted intruders. Protect your internal
cells from harmful free radicals and maintain immunity
I really like the taste of these gummies. Good sweet orange flavor.
Although I will admit that when you open the container they have an
initial weird smell and kind of odd taste right at first which I think is
the sugar crystals on the outside of each gummy. But the inside tastes
great. It's not all sticky on your teeth like some vitamin gummies. Would
be great for kids for extra dose of Vit C. Good price per serving too
4.6 out of 5 - 400 global ratings
9 - 10. Best Liquid
Liquid supplements are a convenient option for anyone looking for a
supplement that can be easily mixed into beverages and absorbed quickly.
9. Pure Encapsulations’ Liposomal Vitamin C Liquid
Pure Encapsulations’ liquid vitamin C is made with a unique, liposomal
form of vitamin C that’s encapsulated in sunflower oil. Research suggests
that liposomal forms of vitamin C may boost your body’s absorption, so you
get more out of each dose (
Trusted Source).
Each teaspoon (5 mL) provides 1,000 mg of vitamin C and
doesn’t contain any added sugars or artificial sweeteners. All of Pure
Encapsulations’ products are certified gluten-free and third-party tested
for quality, purity, and potency.
I love the flavor! I am on a natural healing journey from cancer and we
use large doses of vitamin C. Since it is water-soluble, it leaves the
body within 2-4 hours, so having this liposomal form allows the body to
absorb the C into fat tissue and dispense it over a longer period of time.
Great as an anti-oxidant or as a cancer-fighter in my case. I use this
3x/day on the days I'm not taking high-dose IV vitamin C.
4.5 out of 5 - 43 global ratings
10. Best Organic Vitamin C: Garden of Life’s Organic Vitamin C Spray
Garden of Life’s vitamin C spray is made from a variety of 100% organic,
whole foods like strawberries, blueberries, and tart cherries.You’ll
receive a 60-mg dose of vitamin C in every 5 sprays, and it doesn’t
contain any added sugar or artificial sweeteners. It comes in two flavors
and is suitable for adults and children over 4 years of age.
The dose of vitamin C in this product is lower than many traditional
supplements, making it a great option for anyone who eats a variety
of vitamin-C-containing foods but still needs some extra help
filling in potential nutrient gaps.
All of Garden of Life’s products are third-party tested for quality and
purity, and its manufacturing facilities are FDA certified.
All 7 of us take this. The kids love the flavor and it’s really helped us
stay healthy all winter long. Some of us have problems with our stomachs
after using other kinds of vitamins but not with this spray. We use several
different vitamin sprays made by Garden of Life and love their products
4.8 out of 5 - 24 global ratings
11 - 12. Best Vitamin C Powder Supplement
Powdered supplements are a great, flexible option. Whether you plan on
drinking them mixed into juices and smoothies or want to fill your own
capsules with customized doses, powdered vitamin C is the way to go.
11. Emergen-C 1000mg Vitamin C Powder for Daily Immune Support (Best Vitamin C Supplements with Zinc and Manganese, B Vitamins and Electrolytes)
#1 in Vitamin C Supplements of Amazon Best Sellers.
Customer Reviews: 4.8 out of 5 - more than 60,000 global ratings.
- Provides daily immune support with Vitamin C, plus other antioxidants (zinc and manganese), B Vitamins and electrolytes.
- Each serving delivers 1,000 mg of Vitamin C – more than 10 oranges. Based on the USDA.gov nutrient database value for a large, raw orange.
12. Best Vitamin C Supplement for Immune System: Emergen-C Immune+
#7 in Vitamin C Supplements of Amazon Best Sellers.
Customer Reviews: 4.9 out of 5 - more than 20,000 global ratings.
About this item
- One serving provides 1,000 mg vitamin C, 1,000 IU (25 mcg) Vitamin D and 10 mg zinc.
- Includes 10 single-serving packets (033 oz each) of Emergen-C Immune+ in Super Orange flavor
- An Enhanced Immune Support Formula with 1,000 mg of Vitamin C, plus Vitamin D and Zinc*
- Packed with more Vitamin C than 10 oranges(1) to support your immune system*
- Made with natural fruit flavors and sweeteners for a delicious Super Orange flavor
- Contains the Proprietary complex with Wellmune WGP beta-glucans and arabinogalactans
- Vitamin C drink mix dissolves quickly in water; it’s fizzy, refreshing and caffeine-free
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Can Vitamin C help against the Coronavirus?
Vitamin C may be one of the most well-known immune nutrients that protect against immune deficiencies and which supports the prevention and recovery from the common cold and upper-respiratory issues, and also protects your cardiovascular system, eyes, skin, and other parts of your body. Research has found that vitamin C may help to optimize the immune system.
Vitamin C and COVID-19
Check out the evidence tracker on vitamin C and COVID-19 from
c19vitaminc.com (constantly updated).

Safety: The U.S. Recommended Dietary Allowance (RDA) for vitamin C is 75 to 120 milligrams per day. Taking large doses of vitamin C (ascorbic acid) on a regular basis lowers your level of copper, so if you are already deficient in copper and take high doses of vitamin C, you can compromise your immune system.
While generally considered safe even in high doses, way too much vitamin C — anything above 2,000 milligrams daily—can cause headaches, insomnia, diarrhea, heartburn, and other issues.
Temporarily taking megadoses of vitamin C supplements to combat a case of the cold or flu is likely not going to cause a problem.
Many vitamin C supplements that are above the US RDA are sold in the market. It’s important to seek a physician’s advice if you intend to take high dose vitamin C on a long term basis. To be on the safe side, you may also request for your kidney functions to be monitored.
For long-term, daily use, your best bet is to eat a diet that is full of high quality organic vegetables and fruits that are minimally processed. Not only will you get vitamin C, but you will get all the other accessory nutrients and micronutrients that are needed to optimize it.
Do take note that the vitamin C dosages given in the hospitals intravenously are different from those over the counter vitamin C supplements. Therefore, when you come across studies on vitamin C, you need to differentiate those that are given intravenously vs your ordinary over-the-counter vitamin C that you purchase from your local drug store.
Moreover, although high dose vitamin C appears promising
for COVID-19 treatment, these doses were exceptionally high and given
via IV (intra-venous) — not taken orally. Additionally, it was only given in cases
severe enough to require hospitalization. Therefore, please do not try these dosages without medical supervision.
Vitamin C, Omicron and Deltacron
Will Vitamin C Work Against Omicron or Deltracron? Vitamin C is not variant specific because it's primary mode of action is to support the body’s immune system which reacts in a variety of ways against viral attack, not just in a specific antibody reaction to a specific spike protein.
Possible side effects
Although vitamin C is a natural compound, getting too much of it can cause
uncomfortable and potentially serious side effects.
Some of the
most common reported side effects include headaches, flushed skin, nausea,
and vomiting (
NIH). Consuming high doses of vitamin C for prolonged periods may also
increase your risk of kidney stones (
NIH).
Always consult your healthcare provider prior to adding any nutritional
supplement to your routine.
Conclusion
Vitamin C is an essential nutrient that plays a diverse role in keeping your
body healthy. We need Vitamin C and we should ideally get it from whole
fruits and vegetables.
Although vitamin C deficiency is rare in developed countries, it can cause
serious health problems that, if left untreated, could be fatal. If you have
trouble getting enough vitamin C from your diet, supplements are a great
option. They come in a variety of physical forms, dosages, and price points.
Most people do not take 5 servings of fruits and vegetables on a daily
basis. Further, Vitamin C is easily destroyed by heat during cooking and our
human bodies are not capable of producing and storing Vitamin C. That being
said, we would not recommend taking high dose supplementation of Vitamin C
for maintenance purposes. Up to 500 mg/day should be reasonable.
Many vitamin C supplements in the market are above the US RDA. It’s important
to seek a doctor’s advice if you intend to take high dose vitamin C on a long
term basis. To be on the safe side, you may also request for your kidney
functions to be monitored.
High dose Vitamin C are considered prescription dosage and is meant for
'treatment' and not 'maintenance'.
So should you just focus on
Vitamin C alone or should you consider other supplements? Vitamin C alone
might not be enough as an optimal strategy. A combination and a synergistic
mix of supplements would be better.
What if you have seen
multiple doctors and they are giving you mixed recommendations? Our
recommendation is to stick to a data driven principle and discuss the
evidence out there with doctors who are open to be updated with data-driven
science and evidence based medicine.
Related..
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Accordingly, reliance on any such information provided herein is solely
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terms.
Always see your doctor before taking these supplements. Be aware
that most of the 'treatment' dosages are above the recommended dietary
allowance (RDA) and therefore such doses should not be maintained on a
long term basis.