Vitamin C: Benefits, Side Effects and Best Supplements 2023

Vitamin C has been a subject of controversy for many years. It may appear to be as simple as ABC, but is not. What's so confusing about Vitamin C? Let's dive into some facts and evidence.

Vitamin C - The Basics

Vitamin C, also known as L-ascorbic acid, is a water-soluble vitamin that is naturally present in some foods, added to others, and available as a dietary supplement. Humans, unlike most animals, are unable to synthesise vitamin C endogenously, so it is an essential dietary component.

The recommended daily intake for vitamin C is 75 mg for women and 90 mg for men.

While it’s commonly advised to get your vitamin C intake from foods, many people turn to supplements to meet their needs.

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 SourceTrusted SourceTrusted 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).

Best vitamin C supplements of 2023

The supplements on this list were chosen based on quality, manufacturing standards, usability, and price.

Here are the best vitamin C supplements.

1. Best Tablet Vitamin C Supplement

1. Nature’s Bounty Vitamin C + Rose Hips, Immune Support, 1000mg

#2 in Vitamin C Supplements of Amazon Best Sellers

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 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.

Related: Best Vitamin C Supplements

Sources of Vitamin C - Food

Fruits and vegetables are the best sources of vitamin C. Citrus fruits, tomatoes and tomato juice, and potatoes are major contributors of vitamin C to the American diet. Other good food sources include red and green peppers, kiwifruit, broccoli, strawberries, Brussels sprouts, and cantaloupe. Although vitamin C is not naturally present in grains, it is added to some fortified breakfast cereals. The vitamin C content of food may be reduced by prolonged storage and by cooking because ascorbic acid is water soluble and is destroyed by heat. Steaming or microwaving may lessen cooking losses. Fortunately, many of the best food sources of vitamin C, such as fruits and vegetables, are usually consumed raw. Consuming five varied servings of fruits and vegetables a day can provide more than 200 mg of vitamin C.

Sources of Vitamin C - Dietary supplements and Different Forms of Vitamin C

Supplements typically contain vitamin C in the form of ascorbic acid, which has equivalent bioavailability to that of naturally occurring ascorbic acid in foods, such as orange juice and broccoli. Other forms of vitamin C supplements include sodium ascorbate; calcium ascorbate; other mineral ascorbates; ascorbic acid with bioflavonoids; and combination products, such as Ester-C®, which contains calcium ascorbate, dehydroascorbate, calcium threonate, xylonate and lyxonate.

A few studies in humans have examined whether bioavailability differs among the various forms of vitamin C. In one study, Ester-C® and ascorbic acid produced the same vitamin C plasma concentrations, but Ester-C® produced significantly higher vitamin C concentrations in leukocytes 24 hours after ingestion. Another study found no differences in plasma vitamin C levels or urinary excretion of vitamin C among three different vitamin C sources: ascorbic acid, Ester-C®, and ascorbic acid with bioflavonoids.

Liposomal Vitamin C

Liposomal vitamins don’t use capsules or tablets or powders to deliver nutrients. Instead, the vitamins are encapsulated in pockets of fat cells called liposomes (hence the name). Apparently this is the most effective way of ensuring the vitamins in the supplement actually get absorbed into your body.

Vitamin C To Boost Your Immune System

One of the main reasons people take vitamin C supplements is to boost their immunity, as vitamin C is involved in many parts of the immune system. 

First, vitamin C helps encourage the production of white blood cells known as lymphocytes and phagocytes, which help protect the body against infection (PubMed).

Second, vitamin C helps these white blood cells function more effectively while protecting them from damage by potentially harmful molecules, such as free radicals.

Third, vitamin C is an essential part of the skin’s defense system. It’s actively transported to the skin, where it can act as an antioxidant and help strengthen the skin’s barriers (ScienceDirect).

Studies have also shown that taking vitamin C may shorten wound healing time (PubMedPubMed).

What’s more, low vitamin C levels have been linked to poor health outcomes.

Vitamin C other Benefits

A review of 28 studies (Diabetes Care. 2021 Feb) in 1,574 people with type 2 diabetes mellitus, demonstrated that vitamin C supplementation may improve blood sugar control and blood pressure in people with type 2 diabetes.

People who have pneumonia tend to have lower vitamin C levels, and vitamin C supplements have been shown to shorten the recovery time (PubMedPubMed).

A large review of 29 studies in 11,306 people demonstrated that regularly supplementing with vitamin C at an average dose of 1–2 grams per day reduced the duration of colds by 8% in adults and 14% in children (PubMed).

Interestingly, the review also demonstrated that regularly taking vitamin C supplements reduced common cold occurrence in individuals under high physical stress, including marathon runners and soldiers, by up to 50% (PubMedPubMed).

Additionally, high dose intravenous vitamin C treatment has been shown to significantly improve symptoms in people with severe infections, including sepsis and acute respiratory distress syndrome (ARDS) resulting from viral infections (PubMedPubMed).

Side Effects of too much Vitamin C

Since vitamin C is water-soluble and your body excretes excess amounts of it within a few hours after you consume it, it’s quite difficult to consume too much.

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. It is suggested that dietary ascorbic acid reduces tissue copper concentrations primarily by interfering with intestinal copper absorption. 

In fact, it is nearly impossible for you to get too much vitamin C from your diet alone. In healthy people, any extra vitamin C consumed above the recommended daily amount simply gets flushed out of the body (PubMed). To put it in perspective, you would need to consume 29 oranges or 13 bell peppers before your intake reached the tolerable upper limit (USDA), which is 2 grams/day.

However, the risks of vitamin C overdose are higher when people take supplements, and it is possible to consume too much of the vitamin in some circumstances. For example, those with conditions that increase the risk of iron overload or are prone to kidney stones should be cautious with their vitamin C intake (PubMedPubMed).

For those with beta-thalassemia major and sickle cell anemia who suffer from iron overload due to regular blood transfusions or excessive destruction of red blood cells need specialized medical treatment with iron chelators and should also control their intake of iron (PubMed).

All the adverse effects of vitamin C, including digestive distress and kidney stones, appear to occur when people take it in mega doses greater than 2,000 mg (PubMed).

In summary, individuals with existing renal disease, Glucose-6-Phosphate Dehydrogenase Deficiency (G6PD), kidney stones, or Hemochromatosis should avoid high dose Vitamin C.

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. High doses of vitamin C (over 500 mg per day) over the long-term may increase the risk of cataracts. High-dose vitamin C can also reduce the effectiveness of certain medications and interfere with certain blood tests.

To be on the safe side, talk to your doctor and you may also request for your kidney functions to be monitored as well.

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.

Key Takeaways

If you do choose to take a vitamin C supplement, it’s important to choose one that’s high quality and to take the correct dose.

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.



Editor's Note: The subject on Vitamin C supplement has been controversial. Although we have tried to summarise and tried to provide important essential information on this topic, it's also likely that we have missed out some important information as well; or it's still confusing.

Let's begin with the non-controversial part. Yes, we need Vitamin C and we should ideally get it from whole fruits and vegetables.

The controversial part is on Vitamin C 'supplement'. Should we supplement our diet with Vitamin C supplement? Our answer is Yes, as most people do not take 5 servings of fruits and vegetables. 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 of Vitamin C as maintenance or on long term basis. Up to 500 mg/day should be reasonable.

As for high dose Vitamin C supplement, we would suggest that you discuss with your doctor. This is a more complicated subject as high dose Vitamin C is considered therapeutic 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, do your own research and discuss the evidence out there with doctors who are open to be updated with data-driven science and evidence based medicine.


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