Daily gut routine
Micro Ingredients Organic Inulin FOS Fiber Powder
A single-ingredient organic inulin powder with a 2.6 g scoop for a once-a-day prebiotic fiber routine.
- Format
- Powder, once a day
- Type
- Prebiotic and fiber
- Cost
- $0.08 a day
- Customer rating
- 4.6 out of 5 from 5,359 ratings from Amazon
What customers consistently report
- A neutral taste that mixes into smoothies and drinks
- A large bag that lasts months
- More regular bowel movements
Those are the themes that recur across the reviews. Moderate review confidence — Amazon shows 4.6 from 5,359 ratings (the seller is a third party) and the brand’s own page shows 4.8 from 446 reviews, but the brand-wide Trustpilot profile is unclaimed with 1.7 from 97 reviews about service and shipping, and there is no Better Business Bureau listing.
Why it might work
Inulin is a chain of fructose units that the small intestine does not digest. It reaches the colon intact, where bacteria, especially bifidobacteria, ferment it into short-chain fatty acids and gas. That fermentation adds bacterial mass and draws water into stool, which is how inulin is meant to ease constipation, and it is also why gas and bloating are common side effects. Inulin is a fructan, a fermentable carbohydrate that can worsen symptoms in some people with irritable bowel syndrome. At 2.6 g the label dose is small, so any effect on stool is likely to be smaller than in the 12 g trials. What the label does not let you check is the plant source, the inulin chain length and the tested contaminant levels.
What the research supports
The evidence is for the ingredient class, not this product. Placebo-controlled trials of 12 g a day of chicory inulin in constipated adults found more bowel movements (a median of 4.0 against 3.0 a week in a 44-adult trial), and a pooled analysis of five trials found softer stools but no improvement in pain or bloating. The one Jerusalem artichoke inulin trial gave 5 g a day to 66 healthy adults and raised bifidobacteria, with mildly more flatulence. This label gives 2.6 g, about a fifth of the constipation-trial dose.
What the label discloses
One ingredient, 2.6 g of organic inulin per scoop with nothing else added, so there is no blend to decode. The label does not name the plant source; the Amazon page says Jerusalem artichoke, and several reviewers on the brand’s site say the bag and brand page do not. The brand says it uses third-party laboratories for heavy metals and microbes but publishes no certificate or laboratory name, and the bag carries a California lead warning.
Who this tends to suit
We match this product to people reporting constipation and irregular bowel habits. 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. We flag this product for anyone pregnant or breastfeeding or 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
Amazon reviewers report mixed digestive effects, with some feeling better and others bloated, some find it does not dissolve well in hot drinks, and some say it clumps. Several brand-site reviewers returned it because the source plant is not on the bag. The label advises asking a physician if pregnant, lactating or taking medication, and carries a California lead warning.
Common questions
Does Micro Ingredients Organic Inulin work?
No trial of this product was found. Trials of inulin at 12 g a day raised stool frequency in constipated adults (4.0 against 3.0 a week in one 44-adult trial), but a pooled analysis found pain and bloating did not improve, and this label gives 2.6 g. On Amazon 80% of 5,359 ratings are five-star.
Is Micro Ingredients Inulin safe, and what are the side effects?
The label advises consulting a physician if pregnant, lactating or taking any medication. Inulin is fermented quickly in the colon, so gas and bloating are the usual side effects in trials, and Amazon’s summary says some customers feel better while others get bloated. The bag carries a California Proposition 65 warning for lead.
How much does Micro Ingredients Inulin cost?
The 2.2 lb (998 g) bag is $29.95 on Amazon and $33.28 on the brand site, with 384 scoops of 2.6 g, which is about $0.08 a day or $0.03 a gram on Amazon. NOW’s inulin on Amazon is about $0.044 a gram for 8 oz and $0.059 a gram for 1 lb, so Micro Ingredients is about 31% to 50% lower per gram.
Micro Ingredients Inulin vs NOW Inulin: what is different?
Both are single-ingredient organic inulin with servings of about 2.6 to 2.8 g. NOW’s product is chicory inulin and Micro Ingredients’ label names no plant (its Amazon page says Jerusalem artichoke); Micro Ingredients costs less per gram, and Amazon shows 4.6 from 5,359 ratings against 4.6 from 5,661 for NOW. No trial compares the two.
Who sells Micro Ingredients Inulin, and what is the return policy?
Amazon sells the bag through a third-party seller with 4.6 stars from 5,359 ratings, but the brand’s Trustpilot profile (unclaimed) shows 1.7 from 97 reviews, mostly about missing customer service and late orders, and the Better Business Bureau lists no profile. The brand allows returns within 30 days if unused and in original packaging, and Amazon lists the item as non-returnable.
Before you take this. Speak to a doctor or pharmacist first if you are pregnant or breastfeeding, or taking prescription medication. Nothing on this page is medical advice, and no supplement diagnoses, treats, cures or prevents disease.
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 Micro Ingredients Organic Inulin FOS Fiber Powder — daily gut routine — 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.