Stool form and regularity
Bio.me Daily Prebiotic Fiber, Unflavored
A tasteless two-ingredient prebiotic fiber powder, one tablespoon a day with 7 g of fiber from partially hydrolyzed guar gum and resistant potato starch.
- Format
- Powder, once a day
- Type
- Fiber and prebiotic
- Cost
- $1.17 a day
- Customer rating
- 4.1 out of 5 from 314 ratings from Amazon
What customers consistently report
- A tasteless powder that mixes into coffee or a smoothie without clumping
- Less bloating and more regular digestion within a few weeks
- No cramping compared with other prebiotics
Those are the themes that recur across the reviews. Moderate review confidence — Amazon shows 4.1 from 314 independent ratings and the brand’s own page shows 67 reviews with no numeric score, there is no Trustpilot profile for bio.me, and the Amazon review text and star split were not readable.
Why it might work
PHGG is guar gum broken into shorter chains so it dissolves without thickening and ferments slowly in the colon; resistant potato starch passes undigested through the small intestine and is fermented by colon bacteria. The brand says this feeds bacteria such as Bifidobacterium and Akkermansia, which the Solnul trial measured in healthy adults, and eases bloating and irregularity, which that trial did not test. Fermentable fibers can add gas at first, and 7 g a day is below the dose above 10 g at which the constipation review found the clearest effect for psyllium. The label does not let you check how much of each fiber is in a tablespoon.
What the research supports
No trial of this product was found. The resistant potato starch, Solnul, raised Bifidobacterium and Akkermansia more than placebo at 3.5 g a day in 72 healthy adults over 4 weeks, but not significantly at 7 g, and the study was funded by its maker; this label prints an 8.5 g blend with no split between the two fibers. For PHGG, an open trial of 5 g a day in 188 adults with IBS improved pain and bowel habit about as well as wheat bran, and the fiber with the clearest constipation evidence in a 2022 review of 16 trials was psyllium at above 10 g a day.
What the label discloses
Both fibers are named but the 8.5 g Bio.me Fiber Blend is one number with no PHGG or resistant starch split, and 8.5 g of blend gives 7 g of fiber. The panel is a Supplement Facts panel with no other ingredients, and the packaging shows Non-GMO Project Verified and Monash low FODMAP marks. The brand says third-party tested without naming a laboratory.
Who this tends to suit
We match this product to people reporting bloating, gas, irregular bowel habits and general abdominal discomfort. It fits someone whose priority is a steady daily routine, regularity or day-to-day comfort. 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, dairy-free, vegan and no added sweeteners. A powder only works if you will take it once a day, every day.
Side effects and what to be aware of
The brand notes that the starch comes from potato for people with a nightshade sensitivity, gives no pregnancy or medication warning on the pages read, and accepts returns only within 30 days, unopened, with return shipping and a $6 fee. No critical review text was readable for this page.
Common questions
Does Bio.me Daily Prebiotic Fiber work?
No trial of the product was found. Its resistant potato starch, Solnul, raised Bifidobacterium and Akkermansia versus placebo at 3.5 g a day in 72 healthy adults, but not significantly at 7 g, and this label does not say how much of its 8.5 g blend is Solnul. Amazon reviewers (4.1 from 314) and the brand’s testimonials mention less bloating and easier regularity.
Is Bio.me Daily Prebiotic Fiber safe, and what are the side effects?
The panel lists only partially hydrolyzed guar gum and resistant potato starch, and the brand says people with a nightshade sensitivity should check with a healthcare provider first because the starch is from potato. No pregnancy or medication warning was found on the pages read; fermentable fibers can cause some gas when you start.
How much does Bio.me Daily Prebiotic Fiber cost?
One tablespoon a day makes a 30-serving pouch a 30-day supply. It is $34.99 on Amazon and on the brand site ($1.17 a day), $29.74 with Subscribe & Save on Amazon ($0.99 a day), and the brand advertises 30% off subscriptions. The brand page showed the pouch as sold out when read.
Bio.me vs Sunfiber or psyllium: how do they compare?
Bio.me gives 7 g of fiber per tablespoon from PHGG plus resistant potato starch. The 2022 constipation review found psyllium and pectin effective at above 10 g a day, so this dose and fiber type sit below the option with the clearest evidence, and no trial was found of PHGG at this dose combined with Solnul.
What is Bio.me’s refund policy?
The brand accepts returns within 30 days of purchase for unopened items in original packaging, with the customer paying return shipping and a $6 processing fee; refunds take 10 to 15 days after the return arrives. The brand does not state a guarantee for opened product.
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Others we researched for the same job
These sit in the same role as Bio.me Daily Prebiotic Fiber, Unflavored — stool form and regularity — so they are the sensible things to weigh it against.
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Related reading
Background on how this type of product works, read from the trial evidence.