Stool form and regularity
NOW Foods Acacia Pure Powder
A single-ingredient soluble fiber that dissolves without thickening, for people who could not get on with psyllium.
- Format
- Powder, once a day
- Type
- Fiber
- Cost
- $0.24 a day
- Customer rating
- 4.5 out of 5 from 2,203 ratings from Amazon
What customers consistently report
- Regularity without the gas or bloating some get from psyllium
- A mild taste that disappears into any drink
- Feeling fuller between meals
Those are the themes that recur across the reviews. High review confidence — 4.5 from 2,203 Amazon ratings on the 12 oz listing.
Why it might work
Acacia is a soluble fiber that, unlike psyllium, does not form a thick gel; it dissolves clear in water and is fermented slowly by colonic bacteria, which produces short-chain fatty acids and adds bacterial mass and water to stool. That slow fermentation is why it is usually better tolerated than inulin and why it is marketed as a prebiotic, and the lack of a gel is why it has no cholesterol effect and why the trial found regularity improved while bloating did not. Like every fiber it needs a full glass of liquid.
What the research supports
Ingredient-level evidence from one recent trial. A 2024 randomized, double-blind, placebo-controlled trial gave 10 g of acacia fiber a day for four weeks to adults with constipation-predominant IBS (176 completed): stool frequency rose by about 1.3 stools a week against placebo, a change above the FDA’s threshold for a meaningful effect, with a trend toward fewer constipation symptoms that did not reach significance and no difference in bloating or quality of life. That is a smaller evidence base than psyllium’s 16 trials, but it is a real one. No trial of this brand was found.
What the label discloses
The entire ingredient list is certified organic acacia (gum arabic) powder. NOW states NPA A-rated GMP certification. A level tablespoon is the label serving; the trial dose of 10 g is somewhat more. No third-party testing certificate is published beyond the GMP statement, and the label carries no allergen statement.
Who this tends to suit
We match this product to people reporting constipation, irregular bowel habits and a feeling of incomplete emptying. It fits someone whose priority is regularity or a steady daily routine. Whether it is the best fit for you depends on the rest of your answers — what you have already tried, what format you will take, and anything that has to be ruled out.
Where it may not fit
The label supports vegan, gluten-free, dairy-free, no added sweeteners and minimal ingredient list. A powder only works if you will take it once a day, every day.
Side effects and what to be aware of
The one placebo-controlled trial found more frequent stools but no change in bloating or quality of life, so it is a regularity product rather than a comfort one. The trial used 10 g a day, which is more than a level tablespoon. It does not gel, so it does nothing for cholesterol, and it is fermented slowly in the colon, which is gentle for most but not gas-free for everyone. Some reviewers say it clumps unless stirred hard.
Is this the right one for you?
The quiz works out which of the products we have researched fits your symptoms, your routine and what you have already tried — and tells you plainly if none of them do.
Take the quiz →Free. Private. Nothing to sign up for.
Others we researched for the same job
These sit in the same role as NOW Foods Acacia Pure Powder — stool form and regularity — so they are the sensible things to weigh it against.
See all the products we have researched →
Related reading
Background on how this type of product works, read from the trial evidence.