Benefits
Gentle prebiotic fiber
In a 4-week dose study in healthy volunteers, gum arabic at 5 to 40 g a day raised stool counts of Bifidobacteria and Lactobacilli compared with water, with about 10 g a day working best, and no notable drawbacks were reported. In a single-dose test, 40 g caused more bloating and gas than the control drink, though tolerance scores stayed low.
Bifidobacterium and Lactobacillus growth
In the same 4-week study, 10 g a day of gum arabic led to higher Bifidobacteria, Lactobacilli and also Bacteroides counts than 10 g of inulin. Bacteria counts are a lab marker, not a measured digestive benefit. The lead author listed an address at Kerry Bioscience, an ingredient company, and the study has not been repeated.
Satiety and fullness after a dose
In single-dose tests, 5 to 40 g of gum arabic in water raised ratings of fullness and cut food eaten 3 hours later by roughly 60 to 200 kcal, and 40 g in juice with breakfast reduced hunger in 48 healthy adults in a Nexira-funded test. These were short tests. No cited study measured GLP-1 or other gut hormones, or tested a capsule-sized dose.
Blood sugar response after a meal
In a Nexira-funded crossover test in 48 healthy adults, 20 g of acacia gum with breakfast gave a lower blood glucose reading at 30 minutes, but the overall glucose response over time did not differ from control, and people varied a lot. No cited study in healthy people measured fasting glucose or cholesterol.
Body fat and BMI in a 6-week trial
In a placebo-controlled trial, 120 healthy women took 30 g a day of gum arabic or a pectin placebo for 6 weeks. In the gum arabic group, BMI fell by 0.32 and body fat by 2.18% from baseline. The abstract reports these within-group changes, not a comparison with placebo, and the dose is far above a capsule.
Mechanism of action
Fermented by colon bacteria
Gum arabic is described as indigestible by human enzymes, so it reaches the colon, where gut bacteria can use it. In the 4-week dose study, taking it went along with higher Bifidobacteria and Lactobacilli counts in stool.
Low-viscosity soluble fiber
Acacia gum dissolves in water without forming a thick gel, which is why it mixes easily into drinks. How it raises fullness is not settled; the human studies cited here measured fullness and food intake, not stomach emptying or gut hormones.
Clinical trials
Randomized controlled dose-finding trial; gum arabic at 5, 10, 20 or 40 g a day in water for up to 4 weeks, with water as negative control and 10 g inulin as positive control (Calame et al. 2008, Br J Nutr)
Healthy adult volunteers
After 4 weeks Bifidobacteria and Lactobacilli counts were higher than with water, with about 10 g a day the best dose. At 10 g, Bifidobacteria, Lactobacilli and Bacteroides counts were higher than with inulin. No significant drawbacks were reported. The lead author listed an address at Kerry Bioscience, an ingredient company.
Two-arm randomized, placebo-controlled, double-blind trial; gum arabic 30 g a day or pectin 1 g a day for 6 weeks (Babiker et al. 2012, Nutr J)
120 healthy adult women who completed the study, 60 per group
In the gum arabic group BMI fell by 0.32 and body fat by 2.18% from baseline. The abstract reports these within-group changes and not a between-group comparison. Side effects in the first week included a thick feeling in the mouth, morning nausea, mild diarrhea and bloating.
Randomized crossover trial; 0, 20 or 40 g acacia gum in orange juice with breakfast after a 12-hour fast (Larson et al. 2021, Nutrients)
48 healthy adults, single-dose tests
With 40 g, people felt less hungry and fuller at 15 and 240 minutes. Blood glucose at 30 minutes was lower with 20 g, but the overall glucose response did not differ from control. Bloating, gas and rumbling were higher with 40 g, though tolerance scores stayed low. Funded by Nexira, which supplied the acacia gum.
Two single-dose studies: a feasibility study with 10 to 40 g and a dose-finding study with 5 or 10 g of gum arabic in water, with water as control (Calame et al. 2011, Appetite)
Healthy volunteers
Food eaten 3 hours later fell by more than 100 to 200 kcal at 40 g, more than 100 kcal at 10 or 20 g, and more than 60 kcal at 5 or 10 g, and fullness ratings rose at all doses. Short tests only, not weight loss.
Randomized, double-blind, placebo-controlled trial; gum arabic 30 g a day or 5 g placebo for 3 months (Babiker et al. 2018, Lipids Health Dis)
91 adults with type 2 diabetes taking diabetes medicines
In the gum arabic group BMI fell 2% and visceral adiposity index 23.7%, and systolic blood pressure fell 7.6% versus 2.7% in the placebo group. Waist size and waist-to-hip ratio did not change. A diagnosed patient group, so the results do not transfer to healthy people.