Sunfiber is made from guar beans, specifically from guar gum that has been broken down through an enzymatic process into a form called partially hydrolyzed guar gum (PHGG). This processing transforms a thick, sticky natural fiber into a fine, dissolvable powder that mixes into food and drinks without changing their taste or texture.
From Guar Bean to Soluble Fiber
Guar gum comes from the seeds of the guar plant, a legume grown primarily in India and Pakistan. In its natural state, guar gum is extremely viscous. It’s the same thickening agent used in ice cream, sauces, and gluten-free baking. That thick, gel-like quality makes raw guar gum impractical as a daily fiber supplement, since it would turn any drink into something resembling pudding.
To solve this, manufacturers use enzymes to partially break down (or “hydrolyze”) the long molecular chains in guar gum. The enzymes typically used include a type that specifically targets the sugar backbone of the gum’s structure, cutting it into smaller, lighter fragments. This process runs at moderate temperatures, around 50°C (122°F), for roughly four hours. The result is a powder with dramatically lower viscosity that dissolves clear in water and remains stable when heated, so you can stir it into coffee, soup, or baked goods without any gritty texture or noticeable flavor.
What’s in a Serving
A standard scoop of Sunfiber weighs about 7 grams and delivers 6 grams of soluble fiber at just 15 calories. That 6-gram dose covers roughly 21% of the daily fiber recommendation for most adults. Because it’s nearly pure soluble fiber, it works differently than insoluble fiber sources like wheat bran. Instead of adding bulk through roughage, soluble fiber dissolves in water and forms a soft gel in your digestive tract, which helps regulate how quickly food moves through your system.
Why PHGG Behaves Differently Than Other Fibers
One of the main reasons people seek out Sunfiber specifically is its reputation for causing less gas and bloating than other fiber supplements. This comes down to how quickly gut bacteria ferment it. Highly fermentable fibers like inulin (found in chicory root and many “added fiber” products) break down rapidly in the colon, producing a burst of gas that people with sensitive stomachs often find uncomfortable. PHGG ferments more slowly and evenly, which means less of that sudden bloating.
Sunfiber carries Monash University’s Low FODMAP certification, which matters if you’re following a low-FODMAP diet for irritable bowel syndrome. FODMAPs are short-chain carbohydrates that pull water into the intestines and ferment quickly, triggering symptoms in sensitive individuals. The Monash certification confirms that PHGG at its recommended serving size stays within the thresholds that most people with IBS can tolerate. This puts it in a different category from supplements based on inulin or fructo-oligosaccharides, which are themselves FODMAPs.
How It Works as a Prebiotic
Beyond adding fiber to your diet, PHGG acts as a prebiotic, meaning it feeds beneficial bacteria in the large intestine. As those bacteria slowly ferment the guar fiber, they produce short-chain fatty acids. These fatty acids nourish the cells lining your colon and help maintain the slightly acidic environment that supports a healthy gut microbiome. This prebiotic effect is one reason PHGG shows up in clinical research on both constipation and diarrhea. Rather than simply speeding things up or slowing them down, it supports a more balanced digestive rhythm.
How to Use It
Sunfiber dissolves completely in both hot and cold liquids, which gives it a practical edge over psyllium husk (which thickens into a gel you need to drink quickly) or methylcellulose (which can clump). You can mix it into water, juice, smoothies, yogurt, oatmeal, or sauces. It holds up under heat, so adding it to soups or baked recipes won’t break down the fiber or change the final product’s consistency. The powder itself is tasteless, odorless, and colorless once dissolved.
A single scoop per day is the standard serving. Some people split the dose across meals, stirring half a scoop into morning coffee and the other half into an evening drink, particularly if they’re new to fiber supplements and want to ease into it. Even though PHGG is gentler than many alternatives, starting with a smaller amount and building up over a few days gives your gut bacteria time to adjust.
What It Isn’t
Sunfiber is purely soluble fiber. It doesn’t contain vitamins, minerals, protein, or significant calories. It’s not a meal replacement or a complete nutritional supplement. It’s also not the same as regular guar gum, which you’d find in the baking aisle. The enzymatic processing changes the molecular structure enough that the two behave very differently in your body and in your glass. If you’ve tried guar gum in cooking and found it thick and gloopy, that experience won’t carry over to PHGG.
It’s also distinct from Benefiber, though the two are related. Benefiber’s original formula used wheat dextrin, but some newer Benefiber products (marketed as “Digestive Advantage”) now use PHGG as well. If you’re comparing labels, the ingredient to look for is “partially hydrolyzed guar gum” regardless of the brand name on the front.