Stool form and regularity
Yerba Prima Psyllium Husks Powder
A single-ingredient psyllium husk powder, one teaspoon (4.5 g of fiber) stirred into a full glass of liquid.
- Format
- Powder, once a day
- Type
- Fiber
- Cost
- $0.29 a day
- Customer rating
- 4.7 out of 5 from 775 ratings from iHerb
What customers consistently report
- Regularity that settles within days of daily use
- A fine powder that stirs in without much clumping
- One ingredient with no sugar or additives
Those are the themes that recur across the reviews. Moderate review confidence — iHerb’s independent 4.7 comes from 775 ratings with verified-purchase tags, Amazon’s 4.4 and 4.5 (709 and 563 ratings) are sold by a third-party seller, there is no Trustpilot profile, and the brand’s own website is not reachable.
Why it might work
Psyllium husk is a viscous, gel-forming soluble fiber that is only slightly fermented in the colon. It holds water, which softens and adds bulk to stool, and the gel slows the absorption of some sugars and bile acids, which is the proposed route for its effects on cholesterol. Each teaspoon is 3.5 g of soluble and 1.0 g of insoluble fiber. The effect depends on drinking plenty of fluid with it: the label warns that taking it with too little liquid may cause choking. The label does not print the husk’s grade or particle size or test its metal content, so those cannot be checked from it.
What the research supports
No trial of this product was found, and the label names no brand ingredient, so the evidence is for psyllium husk as a class. A meta-analysis of 16 trials in 1,251 adults with chronic constipation found psyllium effective, with the clearest effect above 10 g a day and at four weeks or more, and a 275-person trial in IBS found 10 g a day of psyllium gave more relief than placebo (57% against 35% in month one). One serving here is 5 g of husk, about half those doses, so those results apply at two or three servings a day.
What the label discloses
The panel lists one ingredient, psyllium, without a gram amount; with a 5 g serving and 4.5 g of fiber the husk is about 5 g. The jar carries a Non-GMO Project Verified seal and no stated laboratory test, heavy-metal result or certificate of analysis, and a California Proposition 65 notice appears on the retailer text. The brand’s own website redirects to a missing eBay store, so the label photograph on retailer pages was the source.
Who this tends to suit
We match this product to people reporting irregular bowel habits, constipation and general abdominal discomfort. 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 gluten-free, no added sweeteners and minimal ingredient list. We flag this product for anyone taking prescription medication, and the quiz removes it rather than recommending it in those cases. That is a caution about who should be deciding, not a claim about the product. A powder only works if you will take it once a day, every day.
Side effects and what to be aware of
Reviews report constipation or a blocked feeling in a minority, powder that is hard to mix or swallow, and a gritty or dark result when baking. The label says not to take it within one to two hours of prescription medications, to take it with a full glass of liquid, and not to use it with difficulty swallowing; minor gas or bloating can occur, and the constipation meta-analysis found more flatulence with fiber.
Common questions
Does Yerba Prima psyllium husks powder work?
No trial of this product was found, but psyllium husk has trial evidence as an ingredient. A review of 16 trials in 1,251 adults with chronic constipation found psyllium effective, with the clearest effect above 10 g a day and at four weeks or more, and a trial of 275 adults with IBS found 10 g a day gave more relief than placebo (57% against 35% in the first month). One label serving is 5 g, so those doses are two or three servings.
Is Yerba Prima psyllium husks powder safe, and what are the side effects?
The label lists one ingredient, psyllium, and warns that taking it without a full glass of liquid may cause choking, that it should not be used by people with difficulty swallowing, and that it should be kept one to two hours apart from prescription medications. It says minor gas or bloating may occur and to reduce the amount until the body adjusts. A small number of iHerb reviewers report constipation or a blocked feeling.
How much does Yerba Prima psyllium husks powder cost?
A 12 oz jar is $19.99 at iHerb, Vitacost and Amazon ($19.95 at Walmart), which is about $0.29 a day at the one-teaspoon serving (68 servings). Taking the 10 g used in the IBS trial, two teaspoons a day, is about $0.59 a day. iHerb’s Subscribe & Save price is $18.99.
Yerba Prima vs NOW psyllium husk powder: what is different?
Both are single-ingredient psyllium husk powders. A Yerba Prima teaspoon is 5 g with 4.5 g of fiber ($19.99 for 340 g, about 5.9 cents per gram); a NOW tablespoon is 9 g with 7 g of fiber ($11.30 for 340 g at Vitacost, about 3.3 cents per gram). The Yerba Prima label has a Supplement Facts panel and a Non-GMO Project seal; NOW’s retailer text shows a Nutrition Facts panel.
Where is Yerba Prima psyllium sold?
The brand’s own website currently redirects to an eBay store page that says the store was not found. The psyllium powder is sold at iHerb, Vitacost, Amazon (through a third-party seller) and Walmart, and the company lists an Ashland, Oregon address and has operated since 1980 according to the Better Business Bureau.
Before you take this. Speak to a doctor or pharmacist first if you are taking prescription medication. Nothing on this page is medical advice, and no supplement diagnoses, treats, cures or prevents disease.
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Related reading
Background on how this type of product works, read from the trial evidence.