Best fiber supplement for gut health

Sunfiber® 90-Day

Tomorrow’s Nutrition Sunfiber® delivers 6 grams of clinically proven, clear, grit free soluble fiber. A true regulating fiber, improves both conditions of occasional constipation and poor elimination as well as occasional diarrhea and loose stools. The result is regularity with healthy consistency.* Tomorrow’s Nutrition Sunfiber® promotes intestinal and colon health, aids in the transit of food through the intestines and helps control the glycemic index of foods.* Tomorrow’s Nutrition Sunfiber® dissolves fast and clear in your favorite beverage and won’t alter the taste or texture of foods. Sunfiber® may be added to recipes when cooking and baking. Simply stir in Sunfiber® until dissolved.

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Benefits
  • Excellent Source of Low FODMAP Fiber, delivering 6 grams of soluble fiber per serving.
  • Sunfiber delivers true regularity without excess gas or bloating*
  • Sunfiber has been shown to improve the growth of helpful bacteria and decrease harmful bacteria.*
  • Sunfiber not only helps with occasional constipation, but uniquely helps with diarrhea as well, returning stool content to a normal healthy state. Unlike other prebiotic fibers, Sunfiber will not lead to a state of diarrhea with frequent consumption.*
  • Sunfiber has a healthy satiety effect, slowing gastric transit time and increasing satiation hormones, resulting in a comfortably full and satiated feeling.*
  • Sunfiber is all natural and 100% Gluten Free (many so called gluten free fibers contain levels up to 20 ppm).
  • Non GMO Project Verified, Low FODMAP certified, Certified Glyphosate Residue Free, Kosher and Vegan.
  • No dairy, soy, sugar, salt, wheat, eggs, artificial flavors or other potential allergens.
  • No taste, odor or grit. Mix with your favorite recipes, beverages, smoothies, cereals and more.
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Best fiber supplement for gut health

Sunfiber® 90-Day

$64.99
Woman drinking water from a glass.

Why Your Gut Will Thank You?

Gentle Yet Effective

Unlike harsh laxatives or bloating-prone fibers, Sunfiber® works naturally with your body.

Low-FODMAP Certified

Ideal for sensitive digestion, including those with IBS.

Truly tasteless and mixes easily

Add to water, smoothies, or coffee - no grit, no flavor, just gut goodness.

Backed by Science

With over 180 published studies, Sunfiber® is one of the world’s most researched soluble fibers.

Safe for Daily Use

Non-GMO, gluten-free, and suitable for adults, kids, and seniors.

Certifications

Best fiber supplement for bloating

How To Take Sunfiber® Daily for Best Results?

1.

Add 1 scoop (7 grams) of Sunfiber® into at least 8 oz. of water, yogurt, smoothies, or another beverage or food.

2.

Stir well for 60 seconds until completely dissolved.

3.

Take once or twice daily as part of your routine.

Dietary supplements for digestion

Why Are Prebiotics Important for a Healthy Gut Microbiome?

Probiotics may get all the spotlight, but prebiotics are the unsung heroes of gut health. These powerful plant fibers don't just pass through your system,they serve as fuel for the good bacteria already living in your gut. By nourishing these friendly microbes, Sunfiber® helps support digestion, improve regularity, and strengthen the gut lining from within.* Think of it as prepping the soil before planting seeds - a healthy gut needs strong roots.
Best fiber supplement for gut health

Science Behind Tomorrow's Nutrition

We are industry leaders in the research and manufacturing of high quality nutritional supplements. Our reputation is built on providing a full range of simple, proven, and trusted supplements using only the finest ingredients.
By focusing on ingredients supported by clinical studies, we offer nutritional support for the entire family. Our award-winning products enhance the body’s own ability to promote and manage health. We are continuously developing safe, innovative products formulated with proven, trusted ingredients from around the world.
Benefits of Sunfiber

What are the benefits of Sunfiber®?

Supports healthy bowel movement frequency*

Helps promote a healthy gut microbiome*

Reduces occasional bloating and gas*

Promotes satiety and blood sugar support*

About Sunfiber®

What is Sunfiber®?

Sunfiber® is an all-natural, regulating soluble dietary fiber derived from the guar bean. Sunfiber® acts as the perfect food source for probiotics, helping increase beneficial bacteria and reduce harmful bacteria in the gut.*

What’s the difference between soluble and insoluble fiber?

Insoluble fiber adds bulk to stool (found in grains, nuts, seeds, and fruit skins). Soluble fiber dissolves in water. The right soluble fiber supports digestion, feeds good bacteria, moderates glucose levels, helps lower cholesterol, and promotes satiety.* Some soluble fibers, however, ferment too quickly, causing gas, bloating, and even diarrhea. Sunfiber® is a soluble, low-FODMAP fiber that supports digestive health without these side effects.*

What are prebiotics?

Prebiotics are food for probiotics. The right prebiotic fiber is essential for probiotics to thrive - but it must be gentle and well tolerated. Sunfiber® is unique among prebiotics: it ferments steadily, producing more short-chain fatty acids (SCFAs) over time, without causing uncomfortable gas or bloating.*

What are short-chain fatty acids (SCFAs)?

SCFAs are small compounds produced by fermentation of dietary fiber by gut bacteria. The three primary SCFAs are acetate, propionate, and butyrate. Butyrate fuels the cells of the colon and supports intestinal health.*

What is the difference between guar gum and Sunfiber®?

Guar gum is a viscous, water-soluble carbohydrate from the guar seed, used in foods as a thickener and stabilizer. Sunfiber®, however, is a low-viscosity form called partially hydrolyzed guar gum (PHGG). It dissolves completely and is used as a gentle fiber source in supplements and functional foods.

What are FODMAPs?

FODMAPs (Fermentable oligosaccharides, disaccharides, monosaccharides, and polyols) are poorly absorbed sugars that may trigger digestive discomfort in those with IBS or other functional GI disorders. Many high-fiber foods are also high in FODMAPs, making it difficult to meet daily fiber needs when following a low FODMAP diet. Sunfiber® is proud to be the first prebiotic fiber to achieve Low-FODMAP Certification by Monash University.

Taking Sunfiber®

Are there any side effects?

At recommended dosages, side effects like gas, bloating, or diarrhea are virtually nonexistent.

What is the recommended intake?

25 grams/day for women and 38 grams/day for men, yet most people only get 10–15 grams. Sunfiber® helps close this gap.

Can Sunfiber® be taken when pregnant or breastfeeding?

Sunfiber® is safe and has long been used during pregnancy and lactation, though you should consult your healthcare practitioner before use.

Can children take Sunfiber®?

Appropriate for all ages above 9 months. One 6-gram serving is recommended.

Can Sunfiber® be added to hot foods or liquids?

Sunfiber® is stable in hot foods and beverages.

Overall rating: 4.878564 / 5 from 947 reviews.

AI Generated Review Summary

Sunfiber® 90-Day by Tomorrow’s Nutrition is a highly regarded soluble fiber supplement praised for its quality and effectiveness. Customers report positive results with no bloating or gas, and appreciate its ability to dissolve quickly and clear in beverages without altering taste. The product is also noted for its role in promoting intestinal health and regularity.

Summary topics

  • Product Quality (3%): Customers keep praising the great quality of the product, with multiple reviews emphasizing its high quality and effectiveness.
  • Gas Relief (3%): It was observed by customers that there was no gas or bloating after using the product.
  • Effectiveness (3%): Customers keep praising the positive results they have seen after using the product, with no bloating reported.
  • Fiber Quality (22%): A significant number of customers pointed out that this fiber supplement is the best they have ever tried.
  • User Feeling (4%): Customers loved how this product made them feel, with many stating that they felt great and healthier after using it.

Review topics: ["feel","packaging","results","issues","quality","texture","improvement","shipping","effects","ingredients","stomach","price","benefits","liquid","customer service","fiber","size","alternative","symptoms","taste","relief","discomfort","consistency","dissolves","pain","blend","sunfiber","works","mixes","grit"].

Review highlights

  • "Enjoying the benefits of using this quality fiber daily!"Josh B.
  • "No gas, no trouble digesting and I feel great."Carole D.
  • "Great fiber supplement that dissolves easily and completely without any taste and works well and consistently."Luisa D.

Reviews

SunFiber

"Very happy with Sunfiber!! Other fiber supplements made me feel more bloated without improving constipation issues. Seems soluble fiber, and particularly SunFiber is the answer for me. So easy to use, without any unpleasantness in taste or texture, and no bloating, and most importantly greatly improved regularity. Sun Fiber gets 5stars x2 from me."

Michele H. (5/5)

Great product

"This fiber dissolves very well and is tasteless and textureless and easy on the stomach! The large size is a good value as well because I use it every day."

Carolyn K. (5/5)

Love this giant container of

"Love this giant container of my favorite fiber! This product was recommended to me by my dietician - after doing a bit of research, it was easy to see why! This 90-day serving size is economical and makes it so easy to incorporate into my daily routine. SO grateful for Sunfiber! I know I'm getting a high-quality supplement that is great for my gut health. :)"

Kim B. (5/5)

SunFiber is an exceptional digestive aid tool

"I have been taking SunFiber for over a year. It is an exceptional digestive aid for my system, aiding in regularity and elimination. I appreciate how it dissolves quickly and completely, even in plain water. I have found all claims on the website to be true for me. I highly recommend SunFiber!"

Jeanne T. (5/5)

Excellent product

"I add this powder to my hot tea daily and it has done wonders for a regular easy bowel routine!! No taste and easily dissolves. Im sold and will continue to use!!"

Kathy (5/5)

Tasteless and easy

"This is truly tasteless. My cousin (a GI doc) and her colleagues all use it, so I tried it. It makes the drink a little more viscous but I put it in my coffee in the morning and can barely tell the difference - and honestly, that’s probably mostly in my head! Highly recommend."

Julia D. (5/5)

Sunfiber is a Lifesaver

"This product was a lifesaver for me. Following a diagnosis of microscopic colitis, I have been able to get my gut back in working order. Daily Sunfiber supported me coming off of budesonide and will be my first line of intervention whenever I have a flare of my MC. Thank you!"

Janice S. (5/5)

Being patient

"I have IBS C and have been taking this for almost 3 weeks but still no changes however, it does not cause any gas or bloating as stated. Just waiting for it to start working."

Tracy B. (5/5)

Helped my husband.

"Seems to work well. I was looking for an alternative to the standard OTC fiber. This sounded natural and had good reviews. It definitely helped my husband's digestive tract come back to normal function."

Sandra R. (5/5)

Great fiber support

"Was recommended to take this daily by my dietitian. Now my boyfriend is on it too! Mixes super easily into literally everything and has no flavor. I believe it has helped with gut regularity and cleanup and will continue to use it!"

Gabi B. (5/5)

Q&A