Product fact sheet
NOW Organic Acacia Fiber: IBS-C Stool-Frequency Evidence & Dose
NOW Organic Acacia Fiber provides 6.5 g acacia gum per tablespoon; a 10 g/day randomized IBS-C trial improved stool frequency but not several other outcomes.
A single-ingredient USDA Organic acacia gum powder providing 6.5 g acacia gum and 6 g soluble fiber per tablespoon. A 2024 randomized IBS-C trial used 10 g/day acacia fiber and significantly improved stool frequency versus placebo, while not significantly improving stool consistency, stool mass or quality of life.
Adults comparing acacia gum as a gradually titratable soluble fiber, People who value a simple organic powder and want a fiber with randomized IBS-C stool-frequency data
Anyone expecting the 6.5 g retail serving to reproduce a 10 g/day trial automatically, People with alarm gastrointestinal symptoms who need diagnostic evaluation rather than escalating fiber
Key tradeoff: Simple formula and useful randomized constipation data, but the trial dose was higher than one NOW serving and improvements were selective rather than global.
This is a factual fit-and-tradeoff summary, not a product recommendation. Formula, device and brand claims remain manufacturer claims unless the cited source is explicitly regulatory or independent testing.
NOW’s Acacia Fiber is a single-ingredient organic gum acacia powder derived from Acacia senegal / Acacia seyal. One tablespoon provides 6.5 g acacia gum and 6 g soluble fiber.
Its clinical story became more interesting with a 2024 randomized, double-blind, placebo-controlled trial in 180 adults with IBS-C.
What the IBS-C trial found
Participants receiving acacia fiber took 10 g/day for four weeks. Compared with placebo, acacia significantly increased stool frequency.
The effect was not universal across every outcome. The trial did not find significant between-group improvement in stool consistency, stool mass or quality of life, and constipation-symptom improvement was only a trend.
That distinction matters. The evidence supports a useful stool-frequency signal—not “acacia cures IBS-C.”
How the NOW serving compares
The NOW serving is 6.5 g, below the 10 g/day trial dose. Two servings would exceed the trial amount, so simply doubling is not an evidence-based instruction. A fiber trial should be approached by gradual titration and tolerance, not by chasing a study number mechanically.
Current product details
| Feature | Specification |
|---|---|
| Ingredient | Organic acacia gum powder |
| Botanical sources | Acacia senegal / Acacia seyal |
| Amount | 6.5 g per tablespoon |
| Soluble fiber | 6 g |
| Certifications shown | USDA Organic / QAI organic, Non-GMO Project Verified, vegan |
| Other ingredients | None |
Where acacia fits among prebiotics
Acacia is a soluble fermentable fiber with direct constipation-level evidence from the cited IBS-C trial. Its evidence is stronger for stool frequency than for stool consistency, stool mass, quality of life or global symptom relief.
People with new bleeding, weight loss, anemia, severe pain, obstruction risk or major bowel-habit change should not keep escalating fiber without medical assessment.
Compare acacia with PHGG, XOS, FOS, GOS, resistant maltodextrin, HMOs and resistant starch.
Formula facts
Ingredients, actives and label details
- Prebiotic substrate
- Organic acacia gum powder from Acacia senegal / Acacia seyal Basis: Manufacturer Source: NOW Acacia Fiber Organic Powder — official product information
- Acacia per serving
- 6.5 g per tablespoon, providing 6 g soluble dietary fiber Basis: Manufacturer Source: NOW Acacia Fiber Organic Powder — official product information
- Organic certification
- Certified Organic by QAI; USDA Organic shown on current product page Basis: Manufacturer Source: NOW Acacia Fiber Organic Powder — official product information
- IBS-C evidence
- A 180-person randomized trial used 10 g/day acacia fiber for 4 weeks and significantly increased stool frequency versus placebo; stool consistency, stool mass and quality of life did not significantly improve Basis: Randomized trial Source: Acacia fiber or probiotic supplements to relieve gastrointestinal complaints in patients with constipation-predominant IBS
Source labels preserve provenance. Manufacturer specifications, ingredient lists and performance claims are not treated as independent clinical evidence; regulatory records and independent measurements are identified separately when available.
Safety first
What should make you slow down?
Use the product as directed, avoid treating concentrated wellness products as automatically harmless, and ask a qualified clinician when your situation or medication use makes the decision less routine.
Where to buy
Current tracked merchants
Commerce note: merchant economics never enter our editorial score. Affiliate links are identified as (paid link) and use sponsored-link markup.
No merchant destination is currently tracked for this product.
Source trail
Primary documents and supporting evidence
- NOW Acacia Fiber Organic Powder — official product informationNOW Foods · Manufacturer · retrieved 2026-08-12
- Acacia fiber or probiotic supplements to relieve gastrointestinal complaints in patients with constipation-predominant IBSEuropean Journal of Nutrition · Professional health · retrieved 2026-08-12