Independent fiber research for US shoppers
Fiber supplements, finally decoded.
Gut Elements compares grams, labels, formats, and cost per gram—so you can choose a fiber supplement on evidence instead of packaging.
- Head-to-head comparisons
- 7
- Sources cited
- 46+
- Paid placements
- 0
Supplement Facts
Ingredients: psyllium husk.3
- 1 Real serving size, not the scoop
- 2 Grams of fiber that actually count
- 3 One ingredient, easy to audit
Start here
What are you trying to decide?
A conservative, food-first framework for increasing fiber gradually, tracking one change at a time, following supplement labels, and knowing when to seek advice.
Read it Comparison · 11 min readFiber powder vs capsules: dose, cost, and convenienceCompare fiber powder vs capsules by dose, capsule count, texture, and cost per 5 grams, with current US label examples and a calculator.
Read it Comparison · 12 min readPsyllium vs PHGG: gel-forming vs low-viscosity fiberCompare psyllium and PHGG by gel formation, fermentability, mixing, label dose, price, and the limits of current human evidence.
Read it Comparison · 11 min readPure psyllium vs flavored fiber powder: what the extras changeCompare plain psyllium with sugar-free and real-sugar flavored powders by ingredients, fiber density, serving size, mixing directions, and cost.
Read it Guide · 10 min readHow to read a fiber supplement labelLearn how to compare fiber supplement labels by serving size, fiber grams, source, sweeteners, warnings, and cost—before choosing a product.
Read itCompare
One question per page. Answered properly.
All comparisonsPsyllium vs PHGG: gel-forming vs low-viscosity fiber
Psyllium forms a viscous, water-holding gel; PHGG is a low-viscosity, more readily fermented soluble fiber. They are not gram-for-gram substitutes, and neither is universally better.
Acacia fiber vs PHGG
Compare acacia fiber and PHGG by source, processing, fermentation, evidence, label dose, mixing, and cost—with a clear account of what is unknown.
Gummies vs Powder or pillsFiber gummies vs powder or capsules
Compare fiber gummies, powder, and capsules by fiber per serving, units, sweeteners, ingredients, and current US cost per 5 grams.
Psyllium vs AcaciaPsyllium vs acacia fiber
Compare psyllium vs acacia fiber by gel formation, fermentability, evidence, mixing, label dose, and cost—with clear limits on what is known.
Know your fiber
“Soluble” is not the whole story.
Two soluble fibers can behave very differently in a glass and in the gut. Here’s how the three most common supplement fibers compare.
Psyllium
Holds water and thickens fast. Drink it promptly.
- Viscosity
- High
- Fermentability
- Lower
PHGG
Processed guar gum that stays thin in a glass.
- Viscosity
- Low
- Fermentability
- Higher
Acacia
Disperses easily with a mild, neutral taste.
- Viscosity
- Low
- Fermentability
- Higher
Relative properties, not a ranking of benefit. Each comparison explains the evidence and its limits.
The Gut Elements standard
No gold stars for good packaging.
Every page shows its sources, its review status, and how we make money. Verdicts are written before any affiliate link is added—and never sold.
- 01Normalize the dose
We compare equal grams of fiber, not scoops or jars.
- 02Link the primary label
Product facts point back to the manufacturer’s own label.
- 03Bound every claim
We say what the evidence shows—and what it doesn’t.
- 04Show the money
Commercial relationships are disclosed on the page.
Guides
The foundations, minus the wellness fog.
All guidesStop comparing scoops. Compare grams.
Plug in any two labels and see the real cost of the same amount of fiber.