Product Comparison
Compare the three fiber chemistries head-to-head — the trial-backed psyllium, the prebiotic inulin, and the gentle acacia. In fiber's comparison, the honest principle is: the chemistry is the product, and the question determines the chemistry.
At a glance
NOW Psyllium Husk Powder
NOW Inulin (Chicory Root FOS)
Acacia Fiber (Gum Arabic)
Multi-dimensional comparison
Multi-dimensional Comparison
| Metric | 🏆NOW Psyllium Husk Powder NOW Foods | NOW Inulin (Chicory Root FOS) NOW Foods | Acacia Fiber (Gum Arabic) Various |
|---|---|---|---|
| Delivery Form | Powder | Powder | Powder |
| Strength | 6 g psyllium husk per serving | 5 g inulin/FOS per serving | 5 g acacia fiber per serving |
| Servings / Container | 85 | 100 | 60 |
| Retail Price | $9.99 | $12.99 | $16.99 |
| Cost / Serving | $0.12BEST 💰 | $0.13 | $0.28 |
| Overall Score | 83/100 | 81/100 | 73/100 |
| 3rd-Party Testing | None | None | None |
| Vegan Friendly | ✓ Yes | ✓ Yes | ✓ Yes |
Did you know?
The category rule
Psyllium (soluble, gel-forming) has the clinical trials; inulin (fermentable, prebiotic) has the ecological mechanism; acacia (low-fermentation soluble) has the tolerability. The 'fiber blend' products serving all chemistries to all users are the borrowed-science category.
The water rule
Bulk-forming fibers without adequate fluid are the category's one genuine safety line — the choking/obstruction risk. The full glass of water is non-negotiable, every dose, every time.
The medication rule
Fiber interferes with medication absorption — the separation rule is part of the pharmacology. Separate from other supplements too (the mineral-binding).
The gas window
The adjustment gas is the microbiome adapting — real, temporary, and manageable by starting at half servings and building. The quit-in-week-one mistake loses the benefit.
The food superior
The lentil serving delivers more fiber than the capsule scoop — plus the protein, the minerals, the mixed chemistry. The supplement is the bridge to the pattern, never the destination.
The LDL dose
The psyllium LDL-lowering trials used ~7–10 g daily — the dose above the single serving, the two-servings-daily pattern. The heart pages' soluble-fiber adjunct quantity.