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: 4.871116 / 5 from 869 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%
  • Gas Relief: 3%
  • Effectiveness: 3%
  • Fiber Quality: 22%
  • User Feeling: 4%

Review topics: [size, ingredients, pain, taste, results, quality, improvement, service, feel, benefits, texture, issues, consistency, packaging, effects, price, relief, stomach, customer service, shipping, symptoms, discomfort, blend, use, order, difference, works, found, fiber, sunfiber].

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

Actually helps me stay regular without feeling bloated

"I’ve tried a lot of fiber supplements and this one has honestly been one of the easiest to stick with. It mixes well, tastes good, and doesn’t leave me feeling heavy or uncomfortable afterward. I noticed a difference in digestion and regularity pretty quickly, and I also like that it fits easily into my morning routine. Definitely feels gentler than some other fiber products I’ve tried. Would repurchase."

Galina A. (5/5)

No hype, just help

"There's so much hype and outlandish promises when it comes to supplements. I'm so glad I took a chance on SunFiber. It dissolves cleaner and works faster than the Miralax I used to swear by. I can also take it every day, something that always brought on the mess of runny stools with other products."

Eleanor S. (5/5)

celiac relief

"I have celiac and needed a good prebiotic to keep a healthy gut and minimize any discomfort. This has been excellent and I love waking up without gas and some abdominal discomfort. I'm a science based person and truly believe in this product"

Laura B. (5/5)

Great fiber!

"The fiber dissolves perfectly with really no taste or flavor. It works well and I find it is more effective than straight up psyllium husk by far."

Ella R. (5/5)

Easily dissolves

"I love how easily this disappears when mixed in any liquid. No grit, no sediment and over the past couple weeks I’ve noticed my gut just feels better."

Lori (5/5)

Best Fiber Supplement

"I've been using Sunfiber for over a year since my doctor recommended it for a GI disorder. It is odorless, tasteless, dissolves quickly in almost any liquid, & is even available in "to go" single dose packets. I buy it on line by subscription with free shipping. I highly recommend it for anyone who needs fiber."

Deanna S. (5/5)

Tomorrow’s Nutrition Sunfiber

"I have been using this great product for the last year. I simply love it! I can mix it in anything without any taste! I have had absolutely no issues with using as directed. My gut has never felt so good since being on this fabulous product-I highly recommend it!"

Melissa C. (5/5)

Easy dissolve

"Our 4 year old daughter had SIBO and her GI doctor recommended we add this to her daily routine. So far it’s been great and she doesn’t notice it at all! I’m starting to take it myself too!"

Karly C. (5/5)

Works like a charm!

"I was having terrible issues due to SIBO. This product really helped get my system moving. I take it every day and will forever. My belly issues have decreased exponentially. I am not a doctor and none of this is medical advice. It just really works for me."

Joey S. (5/5)

Works great

"Sunfiber works great for me. I put a scoop in my smoothie everyday for a little boost of fiber. I hear it can help reduce cholesterol too."

Robin L. (5/5)

Q&A