fiber

Fiber supplements

Half of the 6,987 fiber supplements in the NIH label database that print an amount list 2 g or less per serving; the middle half list 1 g to 4 g (DSLD version 9.4.0, January 2026). The 506 products whose only supplement ingredient is fiber list a median of 2 g.

How much fiber do supplements contain?

The median product lists 2 g per serving. One in ten lists 1 g or less, one in ten 6 g or more. The amount printed most often is 1 g (2,773 products).

Which products list the most fiber?

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).

• QCarbo32 Grape FlavorHerbal Clean16 g
• Lean Meal Grass-Fed Whey Protein VanillaAdaptogen Research16 g
• Lean Meal Grass-Fed Whey Protein ChocolateAdaptogen Research16 g
• QCarbo32 Tropical FlavorHerbal Clean16 g
• Complete Whole Food Health Optimizer Natural FlavorSequel Vega15 g
• Complete Whole Food Health Optimizer Berry FlavorSequel Vega15 g
• Complete Whole Food Health Optimizer Vanilla Chai FlavorSequel Vega15 g
• Liquid Fiber Sugar Free OrangeNature's Way15 g

Have the amounts changed over the years?

Products whose current label entered DSLD in 2011 list a median of 2 g; those entered in 2025, 1.2 g.

In which products and brands?

Brands listing it most: Nature's Plus (123), Nature's Way (116), Garden of Life (76), XYMOGEN (76), Natural Factors (74), NOW (67), Metagenics (64), Enzymatic Therapy (61), Source Naturals (60), Amazing Grass (57).

Every product listing fiber

8,718 products, A to Z by name (page 171 of 175), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• Whey Protein Isolate StrawberryPrecision Engineered · off the market1 g
• Whey Protein Isolate StrawberryNOW Sports1 g
• Whey Protein Isolate Toffee Caramel FudgeNOW Sportsno amount
• Whey Protein Isolate UnflavoredBodyTechno amount
• Whey Protein Isolate UnflavoredAntler Farmsno amount
• Whey Protein Isolate UnflavoredCalifornia Gold Nutrition SPORTno amount
• Whey Protein Isolate UnflavoredNOW Sportsno amount
• Whey Protein Isolate UnflavoredAbout Timeno amount
• Whey Protein Isolate VanillaAbout Time · off the marketno amount
• Whey Protein Isolate VanillaThorne Research · off the market1 g
• Whey Protein Isolate VanillaEXOS Performance Nutrition · off the market1 g
• Whey Protein Isolate VanillaPrecision Engineeredno amount
• Whey Protein Isolate VanillaAntler Farms · off the marketno amount
• Whey Protein Isolate VanillaAboutTimeno amount
• Whey Protein Isolate VanillaKagedno amount
• Whey Protein Isolate Vanilla FlavorAntler Farms · off the marketno amount
• Whey Protein Isolate Vanilla FlavoredThorne Research · off the market1 g
• Whey Protein Isolate Vanilla FlavoredEXOS Performance Nutrition · off the market1 g
• Whey Protein Isolate Vanilla FlavoredThorne1 g
• Whey Protein Isolate Vanilla WaveTwinlab CleanSeries1 g
• Whey Protein Isolate Very VanillaCalifornia Gold Nutrition SPORTno amount
• Whey Protein Milk ChocolateGHOST1 g
• Whey Protein Natural ChocolateIMSOALPHA1 g
• Whey Protein Natural Chocolate FlavorParadiseno amount
• Whey Protein Natural VanillaNOW Sports · off the market2 g
• Whey Protein Natural VanillaDouglas Cooper Co.2 g
• Whey Protein Natural Vanilla FlavorParadiseno amount
• Whey Protein Nutter ButterGHOST1 g
• Whey Protein OreoGHOST1 g
• Whey Protein Oreo Birthday Cake FlavorGHOSTno amount
• Whey Protein Oreo MintGHOST1 g
• Whey Protein Peanut Butter Cereal MilkGHOSTno amount
• Whey Protein Piña ColadaJay Robbno amount
• Whey Protein Plus Elite Series Triple ChocolateSix Star Pro Nutrition1 g
• Whey Protein Plus Probiotics and Enzymes ChocolateLake Avenue Nutrition2 g
• Whey Protein Plus Probiotics and Enzymes VanillaLake Avenue Nutrition2 g
• Whey Protein Plus Triple ChocolateSix Star Pro Nutrition · off the market1 g
• Whey Protein Powder Natural Chocolate FlavorVitaCeutical Labs1 g
• Whey Protein Powder Natural FlavorVitaCeutical Labsno amount
• Whey Protein Powder Natural Strawberry FlavorVitaCeutical Labsin a blend
• Whey Protein Powder Natural Vanilla FlavorNutra Sport · off the market1 g
• Whey Protein Powder Natural Vanilla FlavorVitaCeutical Labsno amount
• Whey Protein Powder VanillaMarket Pantryno amount
• Whey Protein Pumpkin PieGHOSTno amount
• Whey Protein Raw ChocolatePromix1 g
• Whey Protein StrawberryNOW Sports · off the market2 g
• Whey Protein Strawberry ShortcakeGHOST1 g
• Whey Protein Supplement VanillaEquateno amount
• Whey Protein Swiss Chocolateproject#1no amount
• Whey Protein Swiss Chocolate FlavorIRONMAN3 g

Where next?

• Fiber gummies
• Check an amount of fiber
• Labels above the upper limit
• All ingredients