- Guar gum is an extract of the guar bean (Cyamopsis tetragonoloba). The plant is primarily grown in Pakistan and India. Guar gum is widely used as a food-thickening agent and as an ingredient in nutritional supplements.
- Guar gum is considered a plant-based dietary fiber, meaning that it is the edible part of a plant that may otherwise be hard to digest and absorb in the intestines. Dietary fibers may help promote bowel movements and may reduce cholesterol and blood sugar levels.
- There is much evidence supporting the use of guar gum in reducing cholesterol levels. Guar gum may help enhance the function of the gastrointestinal (GI) tract and may help people who have diarrhea, constipation, or irritable bowel syndrome (IBS). Studies have also shown that guar gum may lower blood sugar following meals, as well as insulin levels in people with and without diabetes.
- According to some research, guar gum may not be effective for weight loss. Following reports of side effects, the U.S. Food and Drug Administration (FDA) moved to ban guar gum as a weight loss ingredient.
- Commonly reported side effects associated with guar gum include stomach pain, diarrhea, and gassiness. Guar gum may also affect how the body absorbs drugs given at the same time, such as metformin and penicillin.