Cluster Bean


Partially-Hydrolyzed Guar Gum from Cyamopsis tetragonoloba

Evidence: Strong

Partially hydrolysed guar gum (PHGG) from the cluster bean is one of the backbone prebiotic fibres in All-in-One Gut Essentials, and for good reason. It is a low-FODMAP, highly soluble galactomannan that dissolves cleanly into liquid and reaches the colon intact, where your resident bacteria ferment it into short-chain fatty acids such as butyrate and acetate. In plain terms, it is food for the microbes that keep digestion running smoothly.

What sets PHGG apart is how kindly it behaves. It ferments steadily rather than explosively, so it nourishes beneficial Bifidobacteria and encourages a balanced microbial community without the bloating and excess gas that coarser fibres can trigger. In a controlled human trial it also supported more regular, comfortable bowel habits. That combination, real prebiotic activity with excellent tolerability, is exactly why we build the formula around it.

PubMed indexes over 2,900 peer-reviewed papers on guar gum.

Selected study

Abe A, Morishima S, Kapoor MP, Inoue R, Tsukahara T, Naito Y, Ozeki M. Partially hydrolyzed guar gum is associated with improvement in gut health, sleep, and motivation among healthy subjects. Journal of Clinical Biochemistry and Nutrition. 2023;72(2):189-197. doi:10.3164/jcbn.22-75

Study summary

Study type: Randomised, double-blind, placebo-controlled parallel trial. Sixty healthy Japanese adults with mild constipation were randomised and 51 completed the eight-week protocol.

Intervention: PHGG at 3 g/day or 5 g/day versus a maltodextrin placebo.

Observed benefits:

  • At 5 g/day, weekly bowel frequency rose by about one extra movement per week and the sense of complete, comfortable evacuation improved versus placebo.
  • Both doses reduced less desirable mucin-degrading bacteria, while 5 g/day enriched beneficial short-chain fatty acid producers.
  • Self-reported wellbeing measures, including refreshment on waking and daytime motivation, improved at the higher dose.

Mechanisms: PHGG resists digestion in the small intestine and is fermented in the colon to short-chain fatty acids, while selectively shifting the microbial balance toward beneficial species.

Safety: No serious adverse events; good overall tolerability at up to 5 g/day.

Evidence strength: Dose-dependent, clinically meaningful benefits from a well-designed human trial, with an excellent safety profile.

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