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

• Barlean's GreensBarlean's · off the market40 mg
• Barley GrassNOW3 mg
• Barley GrassHerbal Hills0.91 mg
• Barley Grass 500 mgAmazing India0.91 mg
• Barley Grass Green Food SupplementHerbal Hills3.2 mg
• Barley Grass Juice PowderThe Vitamin Shoppe10 mg
• Barley Grass Tablet 1000 mgHerbal Hills0.91 mg
• BarleyMax CapsulesHallelujah Dietin a blend
• Barn Dad's FiberDX 8-Layer Fiber MatrixBarnDad Innovative Nutrition · off the marketno amount
• Barn Dad's FiberDX Ultimate Fiber Matrix German Chocolate ShakeBarnDad Innovative Nutrition · off the marketin a blend
• BarnDad's FiberDX Strawberry CreamBarnDad Innovative Nutritionin a blend
• Base ControlHUM100 mg
• Baseline Iron+Gnarly Sports Nutrition15 mg
• Baseline Multi Iron FreeNutra Sport100 mg
• Baseline Vitamin C 500 mgNutra Sport500 mg
• Basic 4 Travel PakWachters' · off the market100 mg
• Basic Anti-OxidantDouglas Laboratories1,000 mg
• Basic AntioxDouglas Laboratories1,860 mg
• Basic Detox NutrientsThorne Research · off the market1,000 mg
• Basic Detox NutrientsThorne · off the market83.3 mg
• Basic MaintenanceMetabolic Maintenance125 mg
• Basic MultiVitamer Laboratories100 mg
• Basic MultiNatural Nutra100 mg
• Basic Nutrient Support TabletPathway To Healing1,025 mg as transcribed, likely a slip
• Basic Nutrients 2/DayThorne Research · off the market250 mg
• Basic Nutrients 2/DayThorne250 mg
• Basic Nutrients IIIThorne · off the market141.6 mg
• Basic Nutrients IVThorne · off the market850 mg
• Basic Nutrients IV Multi With Copper And IronThorne · off the market141.6 mg
• Basic Nutrients VThorne Research · off the market425 mg
• Basic Nutrients VThorne · off the market850 mg
• Basic Nutrients V With Copper Without Iron & IodineThorne Research · off the market850 mg
• Basic OneVitalBulk100 mg
• Basic One Iron FreeCooper Complete150 mg
• Basic One with IronCooper Complete · off the market150 mg
• Basic PlusLife Zone60 mg
• Basic PrenatalThorne Research · off the market150 mg
• Basic PrenatalThorne150 mg
• Basic Preventive 1 (Plus Iron And Copper)Douglas Laboratories1,200 mg
• Basic Preventive 2 (Iron and Copper Free)Douglas Laboratories1,200 mg
• Basic Preventive 3Douglas Laboratories1,200 mg
• Basic Preventive 3 (Plus Iron)Douglas Laboratories · off the market1,200 mg
• Basic Preventive 4 (Iron and Copper Free)Douglas Laboratories1,200 mg
• Basic Preventive 5 (Iron Free)Douglas Laboratories535 mg
• Basic Preventive 5 Plus Extra Vitamin DDouglas Laboratories1,200 mg
• Basic Preventive JuniorDouglas Laboratories300 mg
• Basic ScavengersMetabolic Maintenance1,000 mg
• BasicsGNC Mega Men60 mg
• BasicsGNC Women's Ultra Mega60 mg
• Basics 50 PlusGNC Mega Men120 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