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 168 of 175), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• Whey Isolate ChocolateThorne FX · off the market1 g
• Whey Isolate ChocolateMyology1 g
• Whey Isolate Chocolate Milkshake FlavorPrimeGENIX · off the marketno amount
• Whey Isolate Chocolate Peanut ButterStaunch · off the market1 g
• Whey Isolate Cookies 'N' CreamStaunch · off the market1 g
• Whey Isolate Hot ChokkieStaunch · off the market1 g
• Whey Isolate Midnight CerealStaunch · off the marketno amount
• Whey Isolate Milk ChocolateProlab · off the market0.5 g
• Whey Isolate VanillaThorne FX · off the market1 g
• Whey Isolate VanillaMyologyno amount
• Whey Isolate Vanilla Ice CreamProlab · off the marketno amount
• Whey Isolate Vanilla Ice CreamStaunch · off the marketno amount
• Whey More Brownie Batter DelightAxe & Sledge Supplements1 g
• Whey Non-GMO Protein Vanilla BeanPropello Life1 g
• Whey Non-GMO Protein West Indies CocoaPropello Life1 g
• Whey of Life Multi-Action Whey Protein Natural Chocolate Blitz FlavorBluebonnet1 g
• Whey Phase Chocolate4 Dimension Nutrition · off the market1 g
• Whey Phase Strawberry4 Dimension Nutrition · off the market1 g
• Whey Phase Vanilla4 Dimension Nutrition · off the market1 g
• Whey Potein StrawberryOrganic Food Barno amount
• Whey Powder 92%Vital Nutrients · off the marketno amount
• Whey Powder 92% Natural Vanilla FlavorVital Nutrients · off the marketno amount
• Whey Powder 92% with Organic Raw CacaoVital Nutrients · off the marketno amount
• Whey Pro XLInterActive Nutrition · off the market1 g
• Whey Pro XL Cookies & CreamInterActive Nutrition · off the market1 g
• Whey Pro XL VanillaInterActive Nutrition · off the market1 g
• Whey ProteinBulkSupplements.com · off the marketno amount
• Whey Protein & Probiotic Blend Vanilla FlavorSolumeve2 g
• Whey Protein + Probiotics BananaPure Power5 g
• Whey Protein + Probiotics StrawberryPure Power5 g
• Whey Protein + Probiotics VanillaPure Power5 g
• Whey Protein 100% Grass-Fed Creamy VanillaFREZZOR0.4 g
• Whey Protein 100% Grass-Fed Rich ChocolateFREZZOR0.4 g
• Whey Protein 25 g Blueberry Toaster PastryGHOSTno amount
• Whey Protein 25 g Chips Ahoy!GHOSTno amount
• Whey Protein 25 g Fruity Cereal MilkGHOSTno amount
• Whey Protein 44 ChocolateHuman Evolution Supplements · off the marketno amount
• Whey Protein Apple Cider DoughnutGHOSTno amount
• Whey Protein Blend ChocolateElevation2 g
• Whey Protein Cereal MilkGHOSTno amount
• Whey Protein ChocolateJay Robbno amount
• Whey Protein ChocolateOrganic Food Barno amount
• Whey Protein ChocolateAll Natural Assets · off the marketno amount
• Whey Protein ChocolateLife Time Fitness · off the market1 g
• Whey Protein ChocolateCenegenics · off the market4 g
• Whey Protein ChocolateRanger Nutrition · off the marketno amount
• Whey Protein ChocolateNewtonEverett1 g
• Whey Protein Chocolate21st Century ReNourish2 g
• Whey Protein Chocolate21st Century ReNourish Sport3 g
• Whey Protein Chocolatec/o1 g

Where next?

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