Quick answer
Tomorrow’s Nutrition lists Sunfiber at about one scoop (7 g, giving 6 g of fiber) mixed into 6 to 8 ounces of water or any non-carbonated beverage. The brand says it can be taken once or twice daily and at any time of day. Sunfiber is partially hydrolyzed guar gum, a clear, low-FODMAP soluble fiber.
Key takeaways
This guide explains partially hydrolyzed guar gum, a gentle, low-FODMAP soluble fiber that mixes clear into drinks.
The article explains that some people ease into it gradually so their gut has time to adjust.
Research suggests it may help regularity, and people with a history of bowel blockage or on medications should check with a clinician first.
If you have questions about whether Sunfiber fits your plan, a short call is a simple place to start.
Sunfiber is a soluble fiber made from guar beans. It dissolves clear and has little taste, which is why many people use it. This page covers the label directions and how it is commonly started. It is educational information. For fiber supplements in general, see How to take a fiber supplement.
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What it is
Sunfiber is partially hydrolyzed guar gum (PHGG). According to the label on Fullscript and Sunfiber’s FAQ, one 7 g scoop provides 6 g of dietary fiber. It is certified low FODMAP by Monash University.
Label dosing
Mix about one scoop (7 g) into 6 to 8 ounces of water or any non-carbonated beverage. The brand says a typical serving is 3 to 7 g and that it can be taken once or twice daily.
A professional version on Fullscript uses 2 smaller scoops (6 g), so follow the scoop on your own tub.
Start-low and timing
Many people start with half a scoop and build up to the full serving over a week or two. This is a general description of how labels are often paced, so please follow the plan your own clinician gives you.
Sunfiber can be taken at any time of day, and many people take it in the morning. It can also be stirred into yogurt, smoothies, or recipes. Drink enough water, as with any fiber. Fiber can affect how some medications are absorbed, so many people separate them by a couple of hours.
What the research says
In a randomized, placebo-controlled trial, healthy adults with a tendency toward constipation took PHGG or placebo, and researchers measured stool characteristics and gut bacteria (Yasukawa 2019). A separate randomized trial compared PHGG with placebo in people with IBS (Niv 2016). Results were mixed across measures.
Cautions and who should check with a provider
Ask first if you are pregnant or nursing, or take medications, and also if you have had a bowel obstruction or have trouble swallowing. Some people notice mild gas at first, and starting with a smaller amount can help.
Questions to bring to your clinician
These questions can help you get the most out of your next visit.
Would a gentle soluble fiber like this be a good fit for my digestion?
Is a soluble fiber like this a reasonable choice alongside my current medications and supplements?
Would it be worth checking any labs before I try a soluble fiber like this, or is my history enough to decide?
What would tell us that a soluble fiber like this is working well for me, and how long should we wait before reviewing it?
Practitioner-grade options in my Fullscript catalog: if you and your clinician decide a supplement makes sense, my supplement guide by health goal links to the practitioner-grade products I trust.
Frequently asked questions
How much Sunfiber should I take?
The label says about one scoop (7 g) in 6 to 8 ounces of a non-carbonated drink. The brand says a typical serving is 3 to 7 g.
When is the best time to take Sunfiber?
The brand says it can be taken at any time of day. Many people take it in the morning.
Is Sunfiber low FODMAP?
Yes. It is certified low FODMAP by Monash University.
Can I mix Sunfiber into coffee?
The label says any non-carbonated beverage, and it can be stirred into foods. Stir until dissolved.
Can I take Sunfiber with medications?
Fiber can slow absorption of some medications. A common approach is to separate them by about 2 hours, but check with your own doctor or pharmacist.
Can I take Sunfiber with probiotics?
Yes. Sunfiber is a prebiotic fiber and is often used with probiotics.
Can I take Sunfiber with other supplements?
Many people space fiber about 2 hours from vitamins and minerals.
How long does Sunfiber take to work?
Many people give it a few weeks of steady daily use. Responses vary.
Related reading
- How to take a fiber supplement
- Best time to take probiotics
- How to take Pendulum Akkermansia
- How to take Saccharomyces boulardii
Sources
- Fullscript catalog. SunFiber (Tomorrow’s Nutrition): Supplement Facts and suggested use.
- Sunfiber. Frequently asked questions.
- Yasukawa Z, et al. 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. Nutrients. 2019. PubMed 31509971
- Niv E, et al. Randomized clinical study: Partially hydrolyzed guar gum (PHGG) versus placebo in the treatment of patients with irritable bowel syndrome. Nutr Metab (Lond). 2016. PubMed 26855665
Talk with your own doctor or healthcare provider about the right dose for you before starting any supplement, especially if you’re pregnant, nursing, or take medications.
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If you have questions about whether Sunfiber fits your plan, a short call is a simple place to start.
This page shares general educational information and is not medical advice. These statements have not been evaluated by the Food and Drug Administration. Talk with your healthcare provider before starting any supplement, especially if you take medications, are pregnant or nursing, or have a health condition. Product labels can change, so always follow the label on the bottle you have.
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