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

• Natural Whey Protein Dutch ChocolateMRM · off the market1 g
• Natural Whey Protein Isolate 25 g ChocolateTrue Athleteno amount
• Natural Whey Protein Isolate 25 g VanillaTrue Athleteno amount
• Natural Whey Protein Rich VanillaMRM1 g
• Natural Whey Protein UnflavoredMRM1 g
• Natural Whey Rich VanillaMRM1 g
• Natural Whey StrawberryMRM1 g
• Natural Whey UnflavoredMRM · off the market1 g
• Naturally Gluten-Free Golden Fields Fiber IISwanson Premium Brand · off the market6 g
• Nature Cleanse PuriFiberNature's Plus · off the market0.5 g
• Nature's HarvestNature's Sunshine · off the marketno amount
• Nature's Lab Fit Complete Delightful Vanilla FlavorDrVita Labs2 g
• Nature's Lab Fit Complete Luxurious Chocolate FlavorDrVita Labs3 g
• Nature's Sweet Life Dark Chocolate 55% CacaoNature's Sunshine2 g
• Nature's ThreeNature's Sunshine2 g
• NatureMAX BOOST Pea Protein Natural Vanilla FlavorMaxi Health3 g
• NatureMAX ENERGIZE Whey Protein Natural Vanilla FlavorMaxi Health1.3 g
• NatureMAX ORIGINAL Soy Protein Natural Vanilla FlavorMaxi Health1 g
• NatureMAX PLUS Soy Protein Natural Chocolate FlavorMaxi Health0.9 g
• Natures's HarvestNature's Sunshine2 g
• Natursyl CapsulesDouglas Laboratories1.5 g
• Nectar Apple EcstasySyntraxno amount
• Nectar Caribbean CoolerSyntraxno amount
• Nectar Crystal SkySyntraxno amount
• Nectar Dragon Fruit FusionSyntraxno amount
• Nectar Fuzzy NavelSyntraxno amount
• Nectar Honeycrisp AppleSyntraxno amount
• Nectar Lattes CappuccinoSyntraxno amount
• Nectar Lattes Caramel MacchiatoSyntraxno amount
• Nectar Lattes Vanilla LatteSyntraxno amount
• Nectar Lemon TeaSyntraxno amount
• Nectar Medical UnflavoredSyntraxno amount
• Nectar Naturals Natural ChocolateSyntrax1 g
• Nectar Naturals Natural Fruit PunchSyntraxno amount
• Nectar Naturals Natural OrangeSyntraxno amount
• Nectar Naturals Natural PeachSyntraxno amount
• Nectar Naturals Natural Strawberry CreamSyntraxno amount
• Nectar Naturals Natural VanillaSyntraxno amount
• Nectar Pink GrapefruitSyntraxno amount
• Nectar Roadside LemonadeSyntraxno amount
• Nectar Strawberry KiwiSyntraxno amount
• Nectar Super Fruit PunchSyntraxno amount
• Nectar Sweets Chocolate TruffleSyntrax1 g
• Nectar Sweets Double Stuffed CookieSyntraxno amount
• Nectar Sweets Strawberry MousseSyntraxno amount
• Nectar Sweets Vanilla Bean TorteSyntraxno amount
• Nectar Tangy MangoSyntraxno amount
• Nectar Twisted CherrySyntraxno amount
• Nectar Wild GrapeSyntraxno amount
• NeoLife Shake Berries N' CreamNeoLife Shake5 g

Where next?

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