SunFiber® (Partially Hydrolyzed Guar Gum)

Proprietary Source

Partially Hydrolyzed Guar Gum fiber called SunFiber™ by Taiyo Inc. is an all natural, galactomannan based soluble fiber made from hydrolyzed guar gum and otherwise known as a “pre-biotic”. SunFiber is also FODMAP diet approved. 

Ingredient Details

Chemical name: Partially Hydrolyzed Guar Gum

Synonyms: Galactomannan Fiber, Guar Fiber

Chemical Formula: (C6H10O5)n

CAS Registry No: 11078-30-1

HTS Number: 1302.32.0020

Immune support

Sunfiber® is a proven prebiotic fiber that increases both Bifidobacteria and Lactobacillus levels. Good bacteria (probiotics) promote a healthy gut microbiota and immunity.

Other uses

Fermentation of Sunfiber® by the gut microbiome results in production of short-chain fatty acids such as butyrate, which provide energy for the digestive tract.
Most fibers help alleviate constipation, but do little to address diarrhea and can lead to loose stools. Sunfiber® alleviates occasional constipation and diarrhea by helping food move through the gut at the right pace; improving stool consistency and regularity of bowel movements.* Sunfiber® accomplishes this without causing excess gas or bloating that can be felt after consumption of some fibers.
Sunfiber® is a secret weapon for anybody aiming to help control their blood glucose levels.* Regardless of whether Sunfiber® is embedded in the food or ingested with water during a meal, it assists the body to reduce post meal blood sugar spikes by decreasing the glycemic index of foods.
Consuming Sunfiber® helps people feel less hungry and fuller after eating. A research study also showed volunteers decreased their calorie intake at their next meal. Appetite control is one part of a successful weight management program.

How it works

Sunfiber soluble fiber acts as food for your good gut bacteria which in turn work to support a healthy immune system. Some dietary fibers can limit the absorption of macronutrients or essential minerals such as magnesium and calcium into the body. Sunfiber® does not inhibit the absorption of macronutrients and helps support the absorption of such minerals.

Hydrolyzation is a controlled natural enzymatic process that breaks guar gum down into smaller units, greatly decreasing its viscosity and allowing the particles to dissolve more readily, while maintaining the original fiber content. Sunfiber is a 100% gluten free fiber. In contrast, many soluble fibers contain gluten, or claim to be gluten free while having levels as high as 20 ppm

Sunfiber® is among the most adaptable of all dietary fibers. It is highly soluble in water, colorless, odorless, tasteless, and gluten free. It also features a very low viscosity, remains stable at low pH levels and is extremely resistant to high temperatures. It’s appearance is a fine white powder, and in solution is transparent. These factors make Sunfiber a superb choice for a wide range of applications, including fruit juices, powdered drinks, carbonated and noncarbonated beverages including coffee, milk and tea; as well as yogurts, creams, cereals and bakery products.


Sunfiber has GRAS affirmation, having no adverse effect at levels over 60 grams per day. It also has approved health claims in Canada – 20% reduction in postprandial blood glucose levels, and regulatory approval in most countries

Interactions with medications

None known

Interactions with Herbs, Supplements, and Foods

None known


Effect of Repeated Consumption of Partially Hydrolyzed Guar Gum on Fecal Characteristics and Gut Microbiota: A Randomized, Double-Blind, Placebo-Controlled, and Parallel-Group Clinical Trial. Yasukawa, Z, et al. Location: Nutrients. 2019 Sep 10;11(9). pii: E2170. doi: 10.3390/nu11092170

Role of guar fiber in improving digestive health and function. Nutrition 2019, 158 – 169.

MAR 21, 2019 Rao, et al. Location: Nutrition. 2019 March Read Full Study:

Dietary supplementation with PHGG helps improve constipation and gut dysbiosis symptoms and behavioral irritability in children with autism spectrum disorder. J. Clin. Biochem. Nutr. March 2019, 1-7. Inoue, et al. Location: Journal of Clinical Biochemistry and Nutrition. 2019 May

Impact of partially hydrolyzed guar gum (PHGG) on constipation prevention: A systematic review and meta-analysis. Kapoor M, et al. Location: Journal of Functional Foods. 2017 Jun

Role of Sunfiber (guar fiber) in appetite control. Rao TP Location: Physiol Behav. 2016 Jun 15;164(Pt A):277-283. doi: 10.1016/j.physbeh.2016.06.014

Soluble dietary fibre partially hydrolysed guar gum markedly impacts on postprandial hyperglycaemia, hyperlipidaemia and incretins metabolic hormones over time in healthy and glucose intolerant subjects. Mahendra P. Kapoor, Noriyuki Ishihara, Tsutomu Okubo Location: doi:10.1016/j.jff.2016.04.008 Author: Russo L, Andreozzi P, Zito FP, Vozzella L, Savino IG, Sarnelli G, Cuomo R Location: Saudi J Gastroenterol. 2015 Mar-Apr;21(2):104-10. doi: 10.4103/1319-3767.153835

Randomized clinical study: Partially hydrolyzed guar gum (PHGG) versus placebo in the treatment of patients with irritable bowel syndrome. Niv E, Halak A, Tiommny E, Yanai H, Strul H, Naftali T, Vaisman N Location: Nutr Metab (Lond). 2016 Feb 6;13:10. doi: 10.1186/s12986-016-0070-5. eCollection 2016

Identification of cysteinylated transthyretin, a predictive biomarker of treatment response to partially hydrolyzed guar gum in type 2 diabetes rats, by surface-enhanced laser desorption/ionization time-of-flight mass spectrometry. Naito Y, et al. Location: J Clin Biochem Nutr.

Improvement of colonic healing by preoperative oral partially hydrolyzed guar gum (Benefiber) in rats which underwent preoperative radiotherapy. Author: Sevinc, et al. Location: J Drug Target.