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.

$64.99 Regular price
Unit price
per 
Shipping calculated at checkout.
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.
American Express
Apple Pay
Diners Club
Discover
Google Pay
JCB
Mastercard
PayPal
Shop Pay
Venmo
Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

This website is encrypted. We take your security very seriously. All transactions powered by Shopify.

Rates are approximations. Exact rates will be provided at checkout.

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: 4.877133 / 5 from 879 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, results, improvement, issues, quality, feel, benefits, taste, ingredients, texture, packaging, service, effects, stomach, customer service, price, alternative, relief, discomfort, works, symptoms, consistency, pain, shipping, blend, use, difference, fiber, sunfiber, mixes].

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

Great Fiber Supplement - without added junk!

"Really love this product. It's such an easy way to add a boost of fiber to your diet. And there's no taste, no grit, and no extra "stuff" like sugar or artificial sweeteners. (Some fiber products have as much as 16 added grams of sugar and 80 calories. Who needs that?!) I add it to my morning iced coffee and don't notice a thing. I highly recommend this fiber supplement."

Rachel D. (5/5)

It works!

"Since being on SunFiber I have noticed a difference in my bowel movements. I was taking a GLP-1 which caused constipation all the time. Once I started taking this fiber supplement it helped soften the stool and it didn’t cause bloating and gas like other fiber supplements I’ve tried in the past. I would recommend this product."

Lindsay B. (4/5)

Wonderful

"I have diverticulosis and the G. I. doctors recommended more fiber and I took over-the-counter stuff. Unfortunately, I believe it then blew up my stomach, and I was more miserable and which has led to another journey which has led me to this wonderful product. This is the best way to add fiber to your stomach without the negative side effects."

Rhonda W. (5/5)

Tomorrow's Nutrition SunFiber

"I'm really enjoying this easy to use product. It has made a noticeable difference in my digestion. The unflavored powder is easy to add to my greek yogurt in the mornings."

Bekki P. (5/5)

Super helpful!

"I've been using SunFiber for the last few months to help with my H2S sibo and I've noticed quite a difference. The price is very reasonable and I highly recommend giving this a try."

Richard R. (5/5)

Sunfiber for Toddler (granddaughter)

"My granddaughter started using SunFiber at 2 years old due to constipation. It was hard for her to poop in her diaper. After a few days of using SunFiber, she no longer strained to poop and is still on it today at 4. 5 years old. Great product ."

Michael G. (5/5)

I love this stuff

"Keeps my pooper pooping and pleasantly so."

Stephanie S. (5/5)

Great supplement

"This was recommended by my dietician and has been hugely helpful. I do eat a lot of fiber, but adding this to my diet has helped my gut and GI issues. It also doesn't taste bad and dissolves easily which I appreciate."

Kelsey (5/5)

BEST fiber supplement ever!

"After years of trying to increase my fiber I am so glad when I found SunFiber. It has no taste, no weird feel in my mouth and it supports my bowels moving every day. Thanks for a great product."

Teresa S. (5/5)

"Disolves superbly. Great product. No bloating or issues so far."

John (5/5)

Q&A