Partially Hydrolyzed Guar Gum

“The Under-Utilised Gut Optimiser”
Partially hydrolyzed guar gum (PHGG) is a soluble fiber, also considered a prebiotic derived from Cyamopsis tetragonolobus L., with lower viscosity and the ability to retain a considerable share of the fiber content. It is used on a large scale in enteral feeding, as a dietary fiber supplement, in drinks and foods, and in the food industry in general. However, little is known about the effect of PHGG on the absorption of minerals and its mechanisms, but recent studies have shown the benefits associated with prebiotic intake on mineral absorption, with no damage to the body growth of the animals.
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This product is not approved by the TGA and is only suitable for US customers and other approved countries.
How to use


PHGG increases the concentration of bifidobacterium and lactobacilli species and increases short-chain fatty acids in the colonic lumen [8–13]. It has also been shown to have a positive effect on some medical conditions, e.g., reducing blood cholesterol and controlling blood sugar levels [14–16]. In addition, it was found to be effective in the treatment of acute diarrhea in children and adult patients of intensive care units [17–19]. PHGG has proved to be effective in softening and improving fecal output and increasing bulking capacities (8).


  • The intake of PHGG significantly increases ferroportin expression in the cecum, thereby enhancing Iron absorption and preventing iron-deficiency (4).
  • High dose PHGG supplement decreases the level in triglyceride, total cholesterol, LDL and VLDL, thereby improving overall cardiovascular health (5).

Gut Health

  • When used experimentally, PHGG relieved symptoms in constipation-predominant and diarrhea-predominant forms of IBS and improved the quality of life (1).
  • PHGG appears to exert prebiotic properties, by increasing the concentration of intestinal short-chain fatty acids, Lactobacilli and Bifidobacteria (1).
  • One study suggests that PHGG can be considered a potential prebiotic compound that may further stimulate the growth of potentially probiotic bacteria or native gut microflora (3).
  • Partially hydrolyzed guar gum (PHGG), improves corticotropin-releasing hormone (CRH)-induced intestinal dysmotility in rats (7).

Blood Sugar

  • PHGG is excellent for blood sugar control, since it can decrease postprandial blood glucose by lowering the rate of absorption from the small intestine, by reducing the diffusion of glucose in the lumen (2).
  • In patients with high blood sugar levels and metabolic syndrome, the addition of PHGG to the usual diet improved cardiovascular and metabolic profiles by reducing WC, HbA1c, UAE and trans-FA (6).

How to use

Partially Hydrolyzed Guar Gum




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Dosing strategy:

Daily use, for longer than 6 weeks appears to exert the greatest effects.

Ideal for:

Gut Health, IBS, Digestive discomfort, Diarrhoea, Constipation.


All vendors are vetted for quality, to ensure they contain the right active ingredients and ratios. Each vendor provides a Certificate of Analysis ℹ️, to ensure accurate dosing, and a product free of contaminants/heavy metals. Further, when brands we work with have been randomly pulled off the shelf and tested by Labdoor, they have tended to score A+ ℹ️.


Before listing products, we compile a list of available research, to determine if claims match the evidence. Likewise, we scour the the internet to gauge people’s experience with each product. Most of the products listed typically score at least [4.5/5 from reviews]. All the studies we’ve found are listed at the bottom of the page, under citations.


All products listed on the BYB website follow screening before listing, to ensure there’s a history of long-term usage without adverse effects. Many products fall under the FDA’s Generally Recognized as Safe (GRAS) guidelines.

Medication interactions and allergies

Please consult your healthcare professional before making any changes to your lifestyle or regime.

For further information on contraindications and allergies, please visit the vendors website.

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PHGG is a highly useful type of fiber that can be easily merged into one's current diet and lifestyle. It works best when used longer term and feeds your good bugs.

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PHGG is entirely water soluble and completely tasteless. It is super easy to incorporate into smoothies, or even sprinkling on food. It has a very strong normalising effect on stool frequency and consistency. Anyone serious about gut health should aim to take this daily.

Lucas, BYB founder
DISCLAIMER: This product is not intended to diagnose, treat, cure, or prevent any diseases. These statements have not been evaluated by the Therapeutic Goods Administration (TGA) or Food and Drug Administration (FDA). This product is intended for research purposes only. All product information available on the website is for educational purposes only. Bodily introduction of any kind into humans is done at the person’s own risk, and Boost Your Biology assumes no responsibility for health outcomes, good or bad, that may result from ingestion or use. Use should be supervised by a qualified healthcare professional.