vitamin

Vitamin C supplements

Half of the 18,583 vitamin C supplements in the NIH label database that print an amount list 100 mg or less per serving; the middle half list 60 mg to 270 mg, and 1 in 82 of the 18,422 with a plausible amount give more than the adult upper limit at the most servings their labels direct (DSLD version 9.4.0, January 2026). The 775 products whose only supplement ingredient is vitamin C list a median of 500 mg, and 1 in 15 of them give more than the upper limit.

How much vitamin C do supplements contain?

The median product lists 100 mg per serving. One in ten lists 21 mg or less, one in ten 750 mg or more. The amount printed most often is 60 mg (2,234 products).

How do the amounts compare with the Daily Value and the upper limit?

The FDA Daily Value for vitamin C is 90 mg (adults and children 4 and older). The median product gives 111% of it per serving; the 90th percentile 833%.

The adult Tolerable Upper Intake Level is 2,000 mg a day (total intake from food, water and supplements). At the most servings their labels direct, 224 of the 18,422 products with a plausible amount (1.2%) give more than that from the supplement alone (what counts as plausible).

The upper limit is for total intake from food, water and supplements unless stated, and does not apply under medical supervision. A label amount is what the maker printed. This is data, not advice: the NIH ODS fact sheets explain what each nutrient does.

Which products list the most vitamin C?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

• Ultra Preventive Forte-Chel (Capsules)Douglas Laboratories3,000 mg
• Ultra Preventive Forte-ChelDouglas Laboratories3,000 mg
• C-500Optimox3,000 mg
• C Buffered CrystalsThompson3,000 mg
• Vitamin C 1,000 mgIndiana Botanic Gardens3,000 mg
• Anti-Alcohol Antioxidants With HepatoProtection ComplexLife Extension3,000 mg
• Mega-Liposomal Vitamin C 3000 mgAurora Nutrascience3,000 mg
• Ortho C+ Lemon FlavorAOR Advanced Orthomolecular Research Premium3,000 mg

Have the amounts changed over the years?

Products whose current label entered DSLD in 2011 list a median of 120 mg; those entered in 2025, 100 mg.

In which products and brands?

Brands listing it most: Nature's Way (366), Douglas Laboratories (330), Nature's Plus (284), ProCaps Laboratories (169), Bronson (151), NOW (144), Country Life (129), Puritan's Pride (110), Source Naturals (108), Nature Made (106).

Every product listing vitamin C

19,919 products, A to Z by name (page 82 of 399), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• Clear FXHealthy Body For Her · off the market60 mg
• Clear Nails Plusnutra4health · off the market120 mg
• Clear Response VanillaInnate Response Formulas300 mg
• Clear SkinShape by HIT Nutrition · off the market60 mg
• Clear ViewNatures Nectar100 mg
• Clear View 1200MaritzMayer Laboratories · off the market60 mg
• Clear Vision FormulaWindmill Rx Premium Vitamins250 mg
• Clear-HMBioclinic Naturals333 mg
• ClearfaceCodeage · off the market120 mg
• Clearface Vitamins+Codeage120 mg
• ClearFX Acne FormulaHealthy Body · off the market60 mg
• ClearheadCodeage · off the market500 mg
• Clearhead Echinacea+Codeage500 mg
• ClearLungs ImmuneRidgeCrest Herbals145 mg
• ClearVisionLidtke140 mg
• Clincally Advanced Hair, Skin & NailsNOW Solutions · off the market60 mg
• Clinical AllergyNatural Clinician500 mg
• Clinical Antioxidant ComplexAnabolic Laboratories · off the market120 mg
• Clinical Chelation CompanionNatural Clinician600 mg
• Clinical Cholesterol/Anti-Homocysteine SupportNatural Clinician60 mg
• Clinical DyspepsiaNatural Clinician30 mg
• Clinical EssentialsTerry Naturally62.5 mg
• Clinical Essentials ImmuneTerry Naturally250 mg
• Clinical ImmuneBergaMet North America500 mg
• Clinical Immune Modulator BiodefenseNatural Clinician500 mg
• Clinical Immunity Daily BoostLifeSeasons500 mg
• Clinical Immunity Elderberry Drink Berry-Lemon FlavorLifeSeasons1,000 mg
• Clinical Immunity Elderberry GummyLifeSeasons225 mg
• Clinical Immunity Quick-StartLifeSeasons1,000 mg
• Clinical Mood ModulatorNatural Clinician60 mg
• Clinical Nutrients 45 - Plus WomenIntegrative Therapeutics300 mg
• Clinical Nutrients 50-Plus MenIntegrative Therapeutics · off the market300 mg
• Clinical Nutrients 50-Plus Men Iron-FreeIntegrative Therapeutics300 mg
• Clinical Nutrients AntioxidantIntegrative Therapeutics · off the market500 mg
• Clinical Nutrients AOXIntegrative Therapeutics500 mg
• Clinical Nutrients Eye FormulaIntegrative Therapeutics600 mg
• Clinical Nutrients For DiabeticsIntegrative Therapeutics300 mg
• Clinical Nutrients for Female TeensIntegrative Therapeutics300 mg
• Clinical Nutrients for Male TeensIntegrative Therapeutics300 mg
• Clinical Nutrients For MenIntegrative Therapeutics300 mg
• Clinical Nutrients For WomenIntegrative Therapeutics300 mg
• Clinical Nutrients HPIntegrative Therapeutics · off the market250 mg
• Clinical Nutrients HP Iron-FreeIntegrative Therapeutics250 mg
• Clinical Nutrients Prenatal FormulaIntegrative Therapeutics300 mg
• Clinical Ocular CareNatural Clinician120 mg
• Clinical Osteoporosis SupportNatural Clinician100 mg
• Clinical Prostate SuppportNatural Clinician12 mg
• Clinical Skin, Hair & NailsNatural Clinician125 mg
• Clinical Strength Ocu SupportProtocol For Life Balance250 mg
• Clinical Strength Ocu SupportNOW250 mg

Where next?

• Liquid vitamin C
• Vitamin C capsules
• Vitamin C drops
• Vitamin C gummies
• Vitamin C powder
• Check an amount of vitamin C
• Labels above the upper limit
• All ingredients