Partially hydrolyzed guar gum

Also known as PHGG, guar gum fibre.

Last reviewed October 9, 2026 · Jump to references

What is Partially hydrolyzed guar gum?

In plain words

PHGG is a soluble fibre made by breaking down some of the long fibre chains in guar seeds. It reaches the large intestine, where gut bacteria break it down into substances that help support the gut lining. Researchers study it for bowel regularity, digestive symptoms, and changes in gut bacteria. Human studies suggest benefits for some bowel symptoms, but it can also cause gas or bloating.

Technical definition

Partially hydrolyzed guar gum (PHGG) is a soluble dietary fibre produced by controlled enzymatic hydrolysis of guar seed galactomannan, reducing its molecular size and viscosity. Rather than acting through a specific receptor, it resists digestion in the small intestine and is fermented by colonic microbes, generating short-chain fatty acids that influence the intestinal environment. It is used as a food and dietary supplement ingredient, not as an approved drug treatment.

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Evidence by use

Each use is rated on its own. There is no single overall effectiveness score.