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

• Matrix 2.0 Mint CookieSyntraxno amount
• Matrix 2.0 Orange CreamSyntraxno amount
• Matrix 2.0 Peanut Butter CookieSyntrax1 g
• Matrix 2.0 Perfect ChocolateSyntrax1 g
• Matrix 2.0 Simply VanillaSyntraxno amount
• Matrix 2.0 Snickerdoodle (Speculoos)Syntrax0.5 g
• Matrix 2.0 Strawberry CreamSyntraxno amount
• Matrix 5.0 Bananas & CreamSyntraxno amount
• Matrix 5.0 Cookies & CreamSyntraxno amount
• Matrix 5.0 Milk ChocolateSyntrax1 g
• Matrix 5.0 Mint CookieSyntraxno amount
• Matrix 5.0 Orange CreamSyntraxno amount
• Matrix 5.0 Peanut Butter CookieSyntrax1 g
• Matrix 5.0 Perfect ChocolateSyntrax1 g
• Matrix 5.0 Simply VanillaSyntraxno amount
• Matrix 5.0 Strawberry CreamSyntraxno amount
• Matrix Bananas & CreamSyntraxno amount
• Matrix Cookies & CreamSyntrax1 g
• Matrix Milk ChocolateSyntrax1 g
• Matrix Mint CookieSyntrax1 g
• Matrix Orange CreamSyntraxno amount
• Matrix Peanut Butter CookieSyntrax2 g
• Matrix Perfect ChocolateSyntrax1 g
• Matrix Simply VanillaSyntraxno amount
• Matrix Snickerdoodle (Speculoos)Syntrax0.5 g
• Matrix Strawberry CreamSyntraxno amount
• Matrix Tiramisu MacchiatoSyntrax1 g
• Max & Ruby GummiesTreehouse Kids Supplements1 g
• Max ACM UnflavoredMM Sports Nutritionno amount
• Max ARM Intense StrawberryMM Sports Nutrition1 g
• Max ARM Lemon LimeMM Sports Nutrition1 g
• Max ARM TangerineMM Sports Nutrition1 g
• Max ARM WatermelonMM Sports Nutrition1 g
• Max EnergeeMaxi Health0.2 g
• Max Gluta Matrix UnflavoredMM Sports Nutritionno amount
• Max Green Synergy Mixed Berry FlavorMM Sports Nutrition3 g
• Max Isolate Berry BlitzMM Sports Nutrition1 g
• Max Isolate Strawberry LemonadeMM Sports Nutrition1 g
• Max Isolate Watermelon SlushMM Sports Nutrition1 g
• Max Lean Protein Chocolate MousseMM Sports Nutrition2 g
• Max Lean Protein French VanillaMM Sports Nutrition2 g
• Max Mass StrawberrySEI Pharmaceuticals · off the market2 g
• Max Mass VanillaSEI Pharmaceuticals · off the market3 g
• Max Protein StrawberrySEI Pharmaceuticals · off the marketno amount
• Maxi Allergy SupportMaxi Health0.1 g
• Maxi Green Energee Natural Berry FlavorMaxi Health0.2 g
• Maxima Green Green Tablets Green Food SupplementHerbal Hills0.97 g
• MaxImmunityPlusBody Dynamics MaXzorb Nutrition · off the market1 g
• MaxImmunityPlusBody Dynamics MaXzorbceuticals Nutrition1 g
• Maximum Anti-Oxidant FormulaRadiance0.05 g

Where next?

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