Home Ingredients Fenumannan® (Fenugreek Galactomannan Fiber)
Metabolic HealthWeight Management

Fenumannan® (Fenugreek Galactomannan Fiber)

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

Fenumannan® is a purified fenugreek galactomannan, the soluble-fiber fraction of fenugreek seed. This gel-forming fiber can blunt the rise in blood sugar after a meal by slowing carbohydrate absorption. In one small acute trial, 8 g of isolated fenugreek fiber raised fullness and cut food intake at the next meal; effects on body weight over time have not been tested.

Studied Dose An acute satiety trial used 4 g and 8 g of isolated fenugreek fiber, with 8 g working better. Postprandial glucose trials of fenugreek gum used about 6 to 16 g. Whole-seed glucose trials used more, often 10 g/day or more of seed powder.
Active Compound Fenugreek (Trigonella foenum-graecum) seed galactomannan, a soluble dietary fiber.

Benefits

Healthy blood sugar

A meta-analysis of 10 trials of whole fenugreek seed found lower fasting glucose (by about 1.0 mmol/L) and HbA1c (by about 0.85 percent), mainly in people with diabetes at medium-to-high doses. In small acute trials of the isolated fiber, fenugreek gum blunted the post-meal glucose rise, though a separate satiety study saw no change in glucose.

Supported by Trial 1

Satiety and reduced food intake

Fenugreek's soluble galactomannan forms a gel that slows gastric emptying. In one small acute trial, 8 g of the isolated fiber increased fullness and reduced food intake at the next meal. Effects on body weight over time have not been tested.

Supported by Trial 1

Digestive effects

As a soluble fiber, fenugreek galactomannan is fermentable and can slow the release of nutrients from a meal. Effects on stool regularity or digestive symptoms have not been measured in human trials.

Supported by Trial 1

Mechanism of action

1

Soluble fiber gel

Fenugreek galactomannan forms a viscous gel that slows carbohydrate absorption, blunting post-meal blood-sugar spikes and prolonging fullness.

2

Glucose-handling support

In trials of whole fenugreek seed, glucose and HbA1c fell, most clearly in people with diabetes. These trials used the whole seed, which also contains 4-hydroxyisoleucine, saponins, and trigonelline, so the effect cannot be credited to the fiber alone.

Clinical trials

1
Meta-Analysis (Review) of Whole Fenugreek Seed and Blood Sugar
PubMed

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

Adults, mostly with diabetes, taking whole fenugreek seed.

Across 10 trials of whole fenugreek seed, fasting glucose fell by 0.96 mmol/L (95% CI 1.52 to 0.40) and HbA1c by 0.85 percent (95% CI 1.49 to 0.22), with significant effects mainly in people with diabetes at medium-to-high doses. Most trials were low quality, and none tested the isolated galactomannan fiber.

Side effects and drug interactions

Common Potential side effects

Generally well-tolerated — digestive symptoms are most common.
Gas, bloating, or a maple-like body odor can occur.
Those allergic to chickpeas or peanuts may react (cross-reactivity).

Important Drug interactions

Diabetes medication — fenugreek may lower blood sugar; monitor.
Anticoagulants — possible mild additive effect; monitor.
Pregnancy — high doses may affect the uterus; consult a doctor.

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Frequently asked questions about Fenumannan® (Fenugreek Galactomannan Fiber)

What is Fenumannan?

Fenumannan® is a purified fenugreek galactomannan, the soluble-fiber fraction of fenugreek seed. This gel-forming fiber can blunt the rise in blood sugar after a meal by slowing carbohydrate absorption.

What is Fenumannan used for?

Fenumannan is researched primarily for Metabolic Health and Weight Management. A meta-analysis of 10 trials of whole fenugreek seed found lower fasting glucose (by about 1.0 mmol/L) and HbA1c (by about 0.85 percent), mainly in people with diabetes at medium-to-high doses.

What is the recommended dosage of Fenumannan?

The clinically studied dose is An acute satiety trial used 4 g and 8 g of isolated fenugreek fiber, with 8 g working better. Postprandial glucose trials of fenugreek gum used about 6 to 16 g. Whole-seed glucose trials used more, often 10 g/day or more of seed powder. Always follow the product label and check with a healthcare provider for personal advice.

Is Fenumannan safe, and does it have side effects?

For most healthy adults, Fenumannan is well tolerated at studied doses. Reported effects can include: Generally well-tolerated — digestive symptoms are most common. Gas, bloating, or a maple-like body odor can occur. 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 — fenugreek may lower blood sugar; monitor. Anticoagulants — possible mild additive effect; monitor. 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 clinical trial and 3 cited references summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(3 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, et al. Effect of fenugreek (Trigonella foenum-graecum L.) intake on glycemia: a meta-analysis of clinical trials. Nutr J. 2014;13:7..PubMedUsed to support: Meta-analysis of 10 trials of whole fenugreek seed (not the isolated galactomannan fiber): fasting glucose fell by about 0.96 mmol/L and HbA1c by about 0.85 percent, mainly in people with diabetes taking medium-to-high doses. Most of the pooled 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;2009;23(11):1543-8.PubMedUsed to support: Randomized single-blind crossover trial in 18 obese adults: 8 g of isolated fenugreek fiber at breakfast increased fullness and satiety, reduced hunger and prospective food intake, and lowered energy intake at a later lunch, but did not change post-meal blood glucose. A single small acute study; palatability fell as the dose rose.
  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;2017;8(6):2142-2154.PubMedUsed to support: Acute human trial in 15 adults at risk of type 2 diabetes: fenugreek gum, dosed to match the viscosity of other soluble fibers, lowered the post-meal rise in blood glucose and insulin, apparently by slowing gastric emptying. Small single-meal study; fenugreek gum was one of three fibers tested.