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 54 of 399), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• Brown Rice Protein Concentrate Chocolate FlavorJarrow Formulas · off the marketin a blend
• Brown Rice Protein Concentrate Mixed Berry FlavorJarrow Formulas · off the marketin a blend
• Bruise FreeDreamQuest Nutraceuticals · off the market60 mg
• Bubble Gummies Delicious Bubble Gum FlavorNature's Plus Source of Life Animal Parade · off the market60 mg
• Buddy BearsDC30 mg
• Buddy BearsDee Cee Laboratories30 mg
• Buen Dia Natural French Vanilla FlavorConvida. Powered by Vibrant Health36 mg
• Buffer-CMBi Nutraceuticals4,000 mg as transcribed, likely a slip
• Buffer-C pH Controlled 1000 mgCountry Life1,000 mg
• Buffer-C pH Controlled 500 mgCountry Life500 mg
• Buffered Ascorbic Acid CapsulesPure Encapsulations670 mg
• Buffered Ascorbic Acid PowderPure Encapsulations1,220 mg
• Buffered Bio C CompleteVitamer Laboratories1,000 mg
• Buffered CSwanson Premium Brand · off the market500 mg
• Buffered C 1,000Health Products Distributors1,000 mg
• Buffered C 1,000 mgVitaCeutical Labs1,000 mg
• Buffered C 1,000 mg Plus MineralsVitaCeutical Labs · off the market1,000 mg
• Buffered C 1,000 mg Plus MineralsVSN Vital Strength Nutrition · off the market1,000 mg
• Buffered C 1,000 mg Plus MineralsVitamer Laboratories1,000 mg
• Buffered C 1,000 mg Plus MineralsVillage Vitality · off the market1,000 mg
• Buffered C 1,000 mg Plus MineralsWoodstock Vitamins1,000 mg
• Buffered C 1000Vinco's · off the market1,000 mg
• Buffered C 1250 mgDC1,000 mg
• Buffered C 2500 mg PowderDC2,000 mg
• Buffered C 500 mgNatural Grocers by Vitamin Cottage500 mg
• Buffered C 500 mgVital Nutrients1,000 mg
• Buffered C CapsulesOrtho Molecular Products700 mg
• Buffered C CapsulesNatural Healthy Concepts700 mg
• Buffered C CapsulesNHC Natural Healthy Concepts700 mg
• Buffered C Complex 750 mg w/BioflavonoidsWonder Laboratories600 mg
• Buffered C CrystalsBluebonnet4,100 mg as transcribed, likely a slip
• Buffered C PowderThorne Research · off the market2,350 mg
• Buffered C PowderMaxi Health800 mg
• Buffered C PowderThorne2,350 mg
• Buffered C Powder 1,000 mgCalifornia Gold Nutrition1,000 mg
• Buffered C Powder Natural Berry FlavorAdvanced Nutrition by Zahler2,350 mg
• Buffered C Powder Natural Fruit Punch FlavorXYMOGEN3,000 mg
• Buffered C SelectMoss Nutrition500 mg
• Buffered C with BioflavonoidsSwanson Premium Brand · off the market500 mg
• Buffered C-1000 ComplexNOW1,000 mg
• Buffered C-500Nature's Way500 mg
• Buffered C-500 mgSpecialty Pharmacy · off the market500 mg
• Buffered C-ComplexThe Vitamin Shoppe750 mg
• Buffered C-Complex PowderThe Vitamin Shoppe1,000 mg
• Buffered C-Complex PowderNOW500 mg
• Buffered Cassava Vitamin C with Calcium and MagnesiumAllergy Research Group500 mg
• Buffered Cassava Vitamin C with Calcium and MagnesiumNutriCology500 mg
• Buffered Gold CCalifornia Gold Nutrition750 mg
• Buffered Gold C 750 mgCalifornia Gold Nutrition750 mg
• Buffered Lemon C PowderOrtho Molecular Products2,350 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