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Product Review: Vitamin C Supplements

Initial Posting: 3/10/17 Last Update: 4/8/17
Vitamin C Supplements Tested by Best Vitamin C Supplements and Whether You Should Take One

-- 20% Fail CL's Tests of Quality --

Vitamin C supplements compared in this review
American Health Ester-C Metagenics Ultra Potent-C Sundown Naturals Vitamin C
Bronson Laboratories Vitamin C Crystals Nature Made C The Vitamin Shoppe Vitamin C 1,000 mg - Capsule
CVS Pharmacy C Nature's Bounty C The Vitamin Shoppe Vitamin C 1,000 mg - Softgels
Dynamic Health Liquid Vitamin C for Kids - Natural Citrus Flavors Nature's Bounty C-1000 mg TwinLab C-1000 Caps
Emergen-C Nature's Plus Vitamin C Up & Up [Target] Vitamin C
Garden of Life Mykind Organics Vitamin C Vitamin C Vitacost Vitamin C
GNC Vitamin C 1000 Rainbow Light Gummy Vitamin C Slices Vitafusion L'il Critters Immune C Plus Zinc & Echinacea
Jamieson C Rexall Vitamin C Vitafusion Power C
Kirkland Signature (Costco) Vitamin C Shaklee Vita -C Vitamin World C-1,000 mg
Life Extension Vitamin C with Dihydroquercetin Spring Valley [Walmart] C Well at Walgreens Vitamin C With Natural Rose Hips
LivOn Laboratories Lypo-Spheric Vitamin C    
Make sure the vitamin C supplement you take passed our quality review and is right for you!
Isn't your health worth it?
Many people take a vitamin C supplement believing it will improve their health or prevent disease. Will it really? Are there downsides? 

And if you take a vitamin C supplement, does the product actually contain what it says? Is it the best product in terms of quality and value?'s tests of popular vitamin C supplements revealed that 20% contained much more vitamin C than listed on their labels — a concern because too much vitamin C can have negative short-term and long-term health effects.

In this report you'll learn about the benefits of vitamin C as an essential nutrient and whether taking it as a supplement helps prevent a cold, gout, or heart disease. You'll also learn that vitamin C may cause problems, including diarrhea, cataracts, and kidney stones. 

Of course, you'll also get's tests and comparisons of vitamin C supplements based on independent, laboratory analyses. You'll find out which products were "Approved" or "Not Approved" and why. You'll also learn which products offer exceptional quality and value - making them CL's Top Picks. Some of these cost as little as 1 or 2 cents per dose! 

You must be a member to get the full test results along with's recommendations and quality ratings. You will get results for 15 vitamin C supplements selected for testing 
by as well as for 15 others which passed the same testing in CL's voluntary Quality Certification Program. In this comprehensive report about vitamin C supplements you'll learn:
    • Which vitamin C supplements passed testing, and which failed
    • Which high-quality vitamin C supplements are also lowest cost
    • What vitamin C can and cannot do for your health
    • The potential advantages and differences of forms of vitamin C, such as Ester-C, sodium ascorbate, slow-release vitamin C, and liposomal vitamin C
    • The value of additional ingredients, such as bioflavonoids (e.g., quercetin, dihydroquercetin, rutin, and hesperidin)
    • The dosage of vitamin C used for different purposes
    • The potential side-effects of vitamin C and its interactions with drugs and diagnostic tests

If you already are a member, SIGN IN now. Answers -- for Vitamin C Supplements
Do vitamin C supplements help prevent cataracts? Get the answer >>

Is it better to get vitamins from foods or supplements, and are natural vitamins better than synthetic vitamins? Get the answer >>

I've been buying nutritional supplements in powder form, as I find them cheaper than tablets and capsules. I am concerned about the effect of air when I open the bottles daily because sometimes my powdered supplements get clumpy. Should I be concerned? Get the answer >>

After several weeks of taking a vitamin C supplement, my wife noticed blood in her urine along with difficult and painful urination. This stopped a week after discontinuing the supplement, but started again when she resumed taking the vitamin C. Could there be glass in the supplement? Get the answer >>

What is Lipo-flavonoid and does it work for tinnitus or other ear problems? Get the answer >>

Which supplements have been shown to be helpful for autism? Get the answer >>

Do any supplements help prevent sunburn or skin damage from sun exposure? Get the answer >>

Some websites claim that synthetic vitamin C in supplements may be a combination the active "L" form and the inactive "D" form of ascorbic acid. Is that true? Should I be concerned? Get the answer >>

Is liposomal vitamin C (sold as Lypo-Spheric) better than other forms of vitamin C? Get the answer >>

Is there cause for concern with "gummy vitamins?" There are many different gummies out there. Are some better than others? Get the answer >>

Is it possible to take too much vitamin C? Get the answer >>

Do any supplements help with gum disease or periodontitis? Get the answer >>

I thought the B vitamins were all water soluble and did not build up in the body, so you would not build up toxic levels. Am I wrong? Get the answer >>

Do any supplements help prevent or improve cataracts? Get the answer >>

I take estrogen replacement (Vagifem), to help relieve the symptoms of menopause. Are there supplements I should avoid, or be taking, due to this drug? Get the answer >>

Which supplements can help to lower blood pressure? Get the answer >>

Which supplements are helpful for age-related macular degeneration (AMD)? Get the answer >>

Do any supplements help for irritable bowel syndrome (IBS)? Get the answer >>

Are there negative interactions between the following supplements I take twice each day, as well as 60 mg of beta-sitosterol with dinner: Vitamin C (500 mg), CoQ10 (100 mg), grape seed extract (100 mg), fish oil (500 mg), vitamin D3/calcium/magnesium/zinc (200 IU/333 mg/113 mg/5mg)? Get the answer >>

After developing kidney stones, I was told to avoid tea -- but recently I've heard that green tea might actually be helpful for kidney stones. Is that true? Get the answer >>

Which supplements can help lower or control my blood sugar? Get the answer >>

I've been taking a Daily Advantage multi but am now concerned by the very high % DV for vitamin C (833% DV), niacin (325% DV), and B vitamins (over 1,000% DV for several). The company tells me this formula is based on clinical experience and the scientific literature. What do you think? Get the answer >>

Are the "% DV" numbers on vitamin supplement labels really based on what I need? Get the answer >>

I do moderate exercise for about an hour a few times a week. Which supplements might help me? Get the answer >>

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