Home Ingredients Fenumannan® (Fenugreek Galactomannan Fiber)
Metabolic HealthWeight ManagementGut Health

Fenumannan® (Fenugreek Galactomannan Fiber)

Trigonella foenum-graecum
Evidence Level
Limited
1 Clinical Trial
3 Documented Benefits
2/5 Evidence Score

Fenumannan® is Sabinsa's fenugreek seed extract standardized to at least 60 percent galactomannans, the gel-forming soluble fiber of fenugreek seed. We found no published human trials of Fenumannan itself. Short studies of other fenugreek fibers and seed preparations suggest support for fullness after a meal and for healthy blood sugar; effects on body weight over time have not been tested.

Studied Dose No Fenumannan dose has been tested in humans. A different fenugreek fiber (FenuLife) was used at 8 g in a one-meal satiety study and at 2 g twice daily before meals in a 2-week heartburn pilot; fenugreek seed meta-analysis trials used 1 to 100 g of seed a day.
Active Compound Fenugreek (Trigonella foenum-graecum) seed galactomannan, a soluble dietary fiber; Sabinsa standardizes Fenumannan to not less than 60 percent galactomannans.

Benefits

Healthy blood sugar

A meta-analysis of 10 trials of fenugreek seed preparations (seed powder, debitterized powder or a seed extract) found fasting glucose about 0.96 mmol/L lower and HbA1c about 0.85 points lower, with clear effects mainly in people with diabetes at medium to high doses. In one small acute study, fenugreek gum in a pudding lowered peak glucose; a one-meal study of another fenugreek fiber saw no glucose change. Fenumannan is untested.

Supported by Trial 1

Satiety and fullness after a meal

In one small one-meal crossover study in 18 adults with obesity, 8 g of an isolated fenugreek fiber at breakfast (Frutarom's FenuLife, per trade press, not Fenumannan) raised fullness and satiety ratings and lowered hunger. Lunch intake was lower than after 4 g but not significantly lower than with no fiber, and later intake did not differ. Effects on body weight have not been tested.

Supported by Trial 1

Occasional heartburn (studied with FenuLife, not Fenumannan)

A 2-week pilot in 45 adults with heartburn after 3 to 8 meals a week tested a galactomannan-rich fenugreek fiber reported as FenuLife (Frutarom), not Fenumannan. Taking 2 g 30 minutes before two meals a day eased diary-rated heartburn more than a starch placebo, which also helped. Symptoms were self-reported and a comparator arm was unblinded. Frequent heartburn needs a doctor's review.

Supported by Trial 1

Mechanism of action

1

Soluble fiber gel

Fenugreek galactomannan forms a viscous solution in the gut. In an acute human study, viscous fibers including fenugreek gum appeared to slow gastric emptying, and that tracked with smaller post-meal glucose and insulin peaks; whether the same thickening explains fullness is not established.

2

Glucose-handling support

In trials of fenugreek seed preparations (seed powder, debitterized seed or a seed extract), glucose and HbA1c fell, most clearly in people with diabetes. Fenugreek seed also contains 4-hydroxyisoleucine, saponins and trigonelline, so these effects cannot be credited to the fiber alone.

3

Fermentable prebiotic fiber (lab data)

In a lab study by the maker's scientists, Fenumannan (63.5 percent galactomannan in the tested batch) resisted simulated stomach acid and pancreatic enzymes and was fermented by the probiotic Bacillus coagulans MTCC 5856, which produced short-chain fatty acids. This was test-tube work only; prebiotic effects in people have not been tested.

Clinical trials

1
Meta-Analysis of Fenugreek Seed Preparations and Blood Sugar
PubMed

Meta-analysis of clinical trials of fenugreek intake on glycemia. (Neelakantan et al. 2014, Nutrition Journal)

Adults, mostly with type 2 diabetes, in 10 trials of fenugreek seed powder, debitterized seed powder or a hydro-alcoholic seed extract at 1 to 100 g a day.

Fasting glucose fell by 0.96 mmol/L (95% CI -1.52 to -0.40; 10 trials) and HbA1c by 0.85 percent (95% CI -1.49 to -0.22; 3 trials). Significant effects on fasting and 2 hour glucose were seen only with medium or high doses in people with diabetes. Most trials were of low quality, and none tested the isolated galactomannan fiber or Fenumannan.

Side effects and drug interactions

Common Potential side effects

Digestive symptoms such as diarrhea, gas, nausea and vomiting can occur.
Fenugreek can give urine, sweat and feces a maple-syrup odor, caused by its sotolon content.
Allergic reactions, including serious ones, have been reported, and cross-reaction with chickpeas, peanuts and other legumes is possible.
Liver toxicity has been reported with fenugreek taken alone and in herbal combinations that included it.

Important Drug interactions

Diabetes medication: large intakes of fenugreek (about 25 g a day or more) may lower blood sugar, so use caution with glucose-lowering drugs and monitor blood sugar.
Warfarin: fenugreek can interact with warfarin and cause bleeding; anyone on warfarin or another blood thinner should check with a clinician first.
Pregnancy: fenugreek is not considered safe during pregnancy in amounts above those in food and has been linked to birth defects; avoid unless a doctor advises it.

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Frequently asked questions about Fenumannan® (Fenugreek Galactomannan Fiber)

What is Fenumannan?

Fenumannan® is Sabinsa's fenugreek seed extract standardized to at least 60 percent galactomannans, the gel-forming soluble fiber of fenugreek seed. We found no published human trials of Fenumannan itself.

What is Fenumannan used for?

Fenumannan is researched primarily for Metabolic Health, Weight Management, and Gut Health. A meta-analysis of 10 trials of fenugreek seed preparations (seed powder, debitterized powder or a seed extract) found fasting glucose about 0.96 mmol/L lower and HbA1c about 0.

What is the recommended dosage of Fenumannan?

No Fenumannan dose has been tested in humans. A different fenugreek fiber (FenuLife) was used at 8 g in a one-meal satiety study and at 2 g twice daily before meals in a 2-week heartburn pilot; fenugreek seed meta-analysis trials used 1 to 100 g of seed a day. Always follow the product label and check with a healthcare provider for personal advice.

Is Fenumannan safe, and does it have side effects?

Side effects and cautions reported for Fenumannan include: Digestive symptoms such as diarrhea, gas, nausea and vomiting can occur. Fenugreek can give urine, sweat and feces a maple-syrup odor, caused by its sotolon content. It may also interact with some medications. Fenumannan is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does Fenumannan interact with any medications?

Possible interactions include: Diabetes medication: large intakes of fenugreek (about 25 g a day or more) may lower blood sugar, so use caution with glucose-lowering drugs and monitor blood sugar. If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for Fenumannan?

NutraSmarts rates the evidence for Fenumannan as Limited (2 out of 5). It is backed by 1 study summary and 8 cited references summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(8 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Neelakantan N, Narayanan M, de Souza RJ, van Dam RM. Effect of fenugreek (Trigonella foenum-graecum L.) intake on glycemia: a meta-analysis of clinical trials. Nutr J. 2014;13:7. doi: 10.1186/1475-2891-13-7.PubMedUsed to support: Meta-analysis of 10 trials of fenugreek seed preparations (seed powder, debitterized seed powder or a hydro-alcoholic seed extract, 1 to 100 g a day), none of the isolated galactomannan fiber: fasting glucose fell by 0.96 mmol/L, 2 hour glucose by 2.19 mmol/L and HbA1c by 0.85 percent (3 trials). Significant fasting and 2 hour effects were seen only with medium or high doses in people with diabetes. Most trials were of low methodological quality.
  2. Mathern JR, Raatz SK, Thomas W, Slavin JL. Effect of fenugreek fiber on satiety, blood glucose and insulin response and energy intake in obese subjects. Phytother Res. 2009;23(11):1543-8. doi: 10.1002/ptr.2795.PubMedUsed to support: Randomized single-blind crossover trial in 18 obese adults: 8 g of isolated fenugreek fiber at breakfast raised satiety and fullness and lowered hunger and prospective consumption ratings. Lunch intake was lower than after 4 g but not significantly lower than control (p = 0.11), and later intake did not differ. Glucose AUC did not change; insulin AUC rose with 8 g, and palatability fell with dose. Trade press reported the fiber was Frutarom's FenuLife, not Fenumannan.
  3. Repin N, Kay BA, Cui SW, Wright AJ, Duncan AM, Douglas Goff H. Investigation of mechanisms involved in postprandial glycemia and insulinemia attenuation with dietary fibre consumption. Food Funct. 2017;8(6):2142-2154. doi: 10.1039/c7fo00331e.PubMedUsed to support: Acute crossover trial in 15 adults at risk of type 2 diabetes: puddings with yellow mustard mucilage, flaxseed gum or fenugreek gum, each dosed to the same target viscosity (5.9 to 15.5 g across the three fibers), generally lowered peak blood glucose and insulin versus control, apparently through slower gastric emptying rather than slower sugar transport. The abstract does not name the gum's source; it is class evidence, not a Fenumannan trial.
  4. DiSilvestro RA, Verbruggen MA, Offutt EJ. Anti-heartburn effects of a fenugreek fiber product. Phytother Res. 2011;25(1):88-91. doi: 10.1002/ptr.3229.PubMedUsed to support: Pilot placebo-controlled trial in adults with frequent heartburn: a fenugreek fiber product taken 30 minutes before two meals a day for 2 weeks reduced diary-rated heartburn severity and rescue antacid use, with effects that differed significantly from placebo, which also had some effects. A ranitidine arm (75 mg twice daily) gave generally similar results. The product was Frutarom's FenuLife (trade press; a Frutarom scientist co-authored), not Fenumannan.
  5. Schulz RM, Ahuja NK, Slavin JL. Effectiveness of Nutritional Ingredients on Upper Gastrointestinal Conditions and Symptoms: A Narrative Review. Nutrients. 2022;14(3):672. doi: 10.3390/nu14030672.PubMedUsed to support: Narrative review that tabulates the fenugreek heartburn pilot: 45 adults with heartburn after 3 to 8 meals a week took 2 g twice daily of a fenugreek fiber the review describes as standardized to 85% galactomannan (maker descriptions differ), versus a starch placebo or an unblinded ranitidine arm, for 2 weeks, with self-reported outcomes. The review rates the evidence for fenugreek and galactomannan on upper digestive symptoms as limited.
  6. Drugs and Lactation Database (LactMed). Bethesda (MD): National Institute of Child Health and Human Development. Fenugreek. Drugs and Lactation Database (LactMed) [Internet], NCBI Bookshelf. 2026;Record updated 15 July 2026..PubMedUsed to support: NIH monograph on fenugreek. It states that fenugreek is generally well tolerated in adults but can cause diarrhea, flatulence, nausea and vomiting; that allergic reactions have been reported and cross-reaction with chickpeas, peanuts and other legumes is possible; that intakes of about 25 g a day or more may lower blood sugar; that liver toxicity has been reported with fenugreek alone and in herbal combinations; that it can interact with warfarin to cause bleeding; and that its sotolon can give urine, sweat and feces a maple-syrup odor.
  7. National Center for Complementary and Integrative Health. Fenugreek. NCCIH Herbs at a Glance (not PubMed-indexed). 2025;Page last updated February 2025..SourceUsed to support: Not PubMed-indexed; NIH consumer fact sheet. It states that fenugreek can cause diarrhea, nausea and other digestive symptoms, that large doses may cause a harmful drop in blood sugar, that allergic reactions including serious ones occur, and that fenugreek is not safe during pregnancy in amounts above those in food, having been linked to birth defects.
  8. Majeed M, Majeed S, Nagabhushanam K, Arumugam S, Natarajan S, Beede K, Ali F. Galactomannan from Trigonella foenum-graecum L. seed: Prebiotic application and its fermentation by the probiotic Bacillus coagulans strain MTCC 5856. Food Sci Nutr. 2018;6(3):666-673. doi: 10.1002/fsn3.606.PubMedUsed to support: In vitro study of Sabinsa's Fenumannan (tested batch 63.52% galactomannan, 65.42% soluble fiber): the galactomannan was not digested by simulated gastric acid or pancreatic enzymes, was fermented (71.4% utilized) by Bacillus coagulans MTCC 5856 with short-chain fatty acid production, and the co-culture inhibited E. coli growth. No human or animal testing; all authors are employees of the maker.