Best Insoluble Fiber Supplement For Constipation (10 Best Supplements)

This article is for you if you are looking for the best insoluble fiber supplement for constipation. 

Constipation is one of the most common gastrointestinal problems and is defined as incomplete and rare stools or difficult stools that last several weeks or more. It is the opposite of diarrhea.

In the United States, about 4 million people suffer from frequent constipation. Constipation is the most common gastrointestinal disease, which leads to 2.5 million visits to the doctor every year.

Fiber laxatives contain fibers that use water from your intestines to make your stool bulkier. A more extensive chair contracts the intestine and finally evacuates solid waste. It is essential to take bulk products with water to avoid side effects such as bloating and gas.

There are two types of Fiber Laxatives, one is soluble, and the other is insoluble.

Soluble fiber dissolves easily in water and breaks down into a jelly substance in a part of the gut called the large intestine. Insoluble fiber does not dissolve in water and remains intact when food passes through the gastrointestinal tract.

Insoluble fiber bulks up your stool and acts like a brush, sweeping through your bowels to get everything out and keep things moving. At the same time, The soluble variety absorbs water and forms a gel-like substance. This helps your stool pass smoothly through your bowels and improves its form and consistency.

This study has linked the increased intake of dietary fiber that can benefit several gastrointestinal disorders; one of them is constipation.

The first part ( From 1-5) of this article is about insoluble fiber supplements, while the second part (from 6-10) is about the mixed form (soluble and insoluble).

Best insoluble fiber supplement for constipation

Here we compiled a list of the best insoluble fiber supplements for constipation.

1. Dr. Natura® Unifiber, Natural Fiber Supplement

Dr. Natura Produced from pure and untreated vegetable cellulose, Natura Unifiber has some significant benefits that are particularly useful for people who follow a restrictive diet or take other medications. It is the best insoluble fiber supplement for constipation that you can take immediately. It has no long-term adverse effects on your health.

Dr. Natura Unifiber gives the stool more volume, allowing food to flow more rapidly into the intestine and stomach. This helps prevent and relieve occasional constipation.


  • Help occasional constipation
  • No gas and bloating
  • Easy to digest
  • Tasteless
  • Non-gelling
  • Gluten-free
  • Easy to use
  • Won’t interfere with other medicine
  • No minimum liquid requirement


  • Sometimes it causes nausea
  • Bad taste
Best insoluble fiber supplement for constipation
Pic: Amazon

2. Nutricology Dietary Fiber Cellulose

This is another best insoluble fiber supplement for constipation because it affects cholesterol levels and does not feed on unwanted bacteria.

Cellulose is an excellent source of insoluble fiber that can help intestinal function. Unlike soluble fiber, insoluble fiber does not ferment quickly in short-chain fatty acids and does not affect cholesterol levels. Insoluble fiber does not nourish unwanted bacteria.

As a dietary supplement, take one teaspoon mixed with water two or three times a day before meals. Sensitive people may want to start with less or as directed by their healthcare professional.


  • Free from Preservatives, diluents, or artificial additives.
  • It can support bowel function.
  • One of the best insoluble fiber supplement for constipation


  • The taste is not good.
Best insoluble fiber supplement for constipation
Pic: Amazon

3. Vital Nutrients – Cellulose Fiber

It is one of the best cellulosic fiber sources and provides 15 grams of insoluble fiber per serving. These insoluble fibers make it the best insoluble fiber supplement for constipation and eliminate toxins. It also helps increase stool volume, promote normal daily bowel function, and promote bowel movement in the colon.

Since insoluble fiber in the intestine is not fermentable, it is less likely to cause gas or flatulence. This product does not contain coatings, binders, gluten (wheat, rye, barley), milk/dairy products (casein, whey), soy protein, protein, and sugar.

The amount per serving is two tablespoons (15 grams) containing 15 g of cellulose fiber (source of insoluble fiber). Apart from cellulose, no other ingredients are used.

The normally recommended use is 1 to 2 tablespoons per day in juice, water, or soft foods or directed by a healthcare professional. If you are pregnant, consult your doctor before taking it.


  • Third-Party tested and is manufactured in FDA approved facility
  • Doesn’t contain binders, gluten, egg protein, milk, sugar, etc
  • All ingredients tested by U.S Labs


  • Expensive from other competitors.
Best insoluble fiber supplements for constipation
Pic: Amazon

4. Reset360 Fiber Love Powder

Do you feel a little late and looking for a greater regularity of the gastrointestinal tract in your life?

Reset360 is there to help you, as it is the best insoluble fiber supplement for constipation. This complete combination of powdered fibers is designed to promote a healthy intestinal transit time and regular bowel function of your body. One serving contains approximately 83% insoluble fiber and 17% soluble fiber, which is entirely adequate to promote healthy bowel activity.

The ingredients in this formula are rice bran, isomalto-oligosaccharide, oat fiber, apple fiber, cellulose, olive oil, and d-alpha-tocopherol acetate (antioxidant).

The regular use is Mix, shake, or vigorously mix one tablespoon in 8 ounces of juice or other beverage, or as prescribed by your doctor.


  • Gluten-Free
  • Non-GMO
  • Vegetarian
  • Blend well
  • Best for occasional constipation and weight management
  • Best insoluble fiber supplement for constipation


  • Sometimes it causes stomach problems
  • Price is high as compared to other competitors
Best insoluble fiber supplement for constipation
Pic: Amazon

5. Botanica Research Adult Fiber Gummies

This formula acts as an appetite suppressant to prevent you from being too hungry. The gummy formula supports explicitly digestive health, and by promoting regularity and digestion, you will immediately notice a higher level of energy. This is the best insoluble fiber supplement for constipation and weight loss.

By optimizing your digestive system, our fibrous gum fibers reduce the time needed for the colon.

The recommended use is the daily intake of 3 gels as a dietary supplement or as directed by your doctor.

Overall, it is a great product. I would recommend it to anyone who wants to start digestion or help with weight loss.


  • Gluten-free
  • Taste is good


  • Gassy
  • You have to take 3 Gummy Fiber a day.
Best insoluble fiber supplement for constipation
Pic: Amazon

Soluble and Insoluble Fiber Supplements (Mix)

Here is a list of both soluble and insoluble fiber supplements for constipation and other GI health.

6. Garden of Life Raw Organic Superfood Fiber

This raw fiber contains 9 grams of fiber per serving (36% of the daily value) and 7 grams of protein, probiotics, and omega-3 fatty acids for health.

Garden Of Life consists of 15 raw organic superfoods, including sprouted seeds, cereals, and legumes.

It supports intestinal health, regular bowel function, cardiovascular function, and general health. It also promotes the healthy excretion of toxins while maintaining healthy blood sugar levels and cholesterol, which are already in the normal range.

The usual use for adults is to mix one tablespoon once (or more times) per day with 10-12 ounces of water. Children over four years can take ½ spoon a day (under supervision).


  • Dairy-Free,
  • Gluten-Free, 
  • Psyllium Free with No Fillers, 
  • No Isolates, No Synthetic Nutrients, 
  • No Artificial Sweeteners, and 
  • No Preservatives
  • GMO Project Verified


  • It thickens up before you can finish stirring it. (Difficult to drink)
  • Slimmy
Best insoluble and soluble fiber supplements for constipation
Pic: Amazon

7. Benefiber Fiber Supplement Powder Stick Packs

Benefiber Original is a daily prebiotic dietary supplement based on 100% natural fibers. Unlike other forms of fiber, such as gums, capsules, and tablets, Benefiber can be added to your favorite foods and drinks.

Prebiotic fiber increases good bacteria and suppresses harmful bacteria, and creates an environment for good digestive health. Adding a 100% natural prebiotic fiber like Benefiber to your diet can help this process and maintain your digestive system’s balance.

It supports good bacteria and the overall digestive health of your digestive system with wheat endotoxin with natural prebiotic fiber.

The usual dose from 12 years three times a day two teaspoons of Benefiber Original in 4.8 ounces of soft drinks or food, with hot or cold stirring. Stir well until dissolved for up to 60 seconds. For children 6 to 11 years, use half of the recommended dose. If you are under six years old or breastfeeding, consult a doctor before using it.


  • Easy to use fiber
  • Taste free, 
  • gluten-free and 
  • sugar-free and dissolves clear
  • best fiber supplement for constipation


  • Bloating
Best insoluble fiber supplement for constipation
Pic: Amazon

8. Biotics Research Colon-Plus Caps

This is also the best fiber supplement for constipation. Each serving of Colon-Plus Capsule contains a mixture of the soluble and insoluble fiber of psyllium, kelgin, apple pectin, mint, flaxseed, anise, bromelain, aloe vera, lactobacillus acidophilus (probiotic), and prunes, specifically designed to promote health Gastrointestinal was developed.

Psyllium powder relieves constipation, stimulates normal peristalsis, and cleanses the intestine of waste. Colon Plus Caps contribute to regularity. Also, proper nutrition with soluble fiber helps improve heart health.


  • Easy to take
  • Tested for toxin and heavy metals
  • Proven potency and efficacy
  • Manufactured in FDA and GMP certified facility
  • Gluten-free


  • Expensive
Best insoluble fiber supplement for constipation
Pic: Amazon

9. Renew Life Adult Fiber Supplement

Renew Life Fiber Smart is an advanced fiber preparation based on flax seeds that promote regularity and promotes intestinal health in adults. Sometimes it relieves swelling and constipation and contains L-glutamine, probiotics, prebiotics, and relaxing botanicals to promote digestive balance.

Renew Life fiber formulations are guaranteed on the expiration date for their quality, purity, and effectiveness. They are made in the USA with ingredients of the highest quality in the world.

Smart Fiber contains L-Glutamine, probiotics, and relaxing botanicals to promote digestive balance and intestinal health in adults.

Fiber Smart is a dietary supplement rich in fiber and is the best fiber supplement for constipation. The insoluble fiber in Fiber Smart supports the body’s natural detoxification process and contributes to the intestine’s health.

The usual recommended dose is four capsules in the morning with 8 oz. of water. It can be repeated at noon and in the afternoon. Drink lots of water with this product.


  • Soy-free and gluten-free
  • Vegetarian
  • Potent and effective
  • A right blend of probiotics and fiber


  • Doesn’t dissolve easily
Best insoluble fiber supplement for constipation
Pic: Amazon

10. ORGANIC INDIA Whole Husk Psyllium

This formula relieves elimination, promotes softness without discomfort or flatulence, gently cleanses the colon, detoxifies the gastrointestinal tract, and is the best fiber supplement for constipation.

Gain a healthy weight or increase your natural weight loss by covering your daily fiber needs with this soluble fiber source that forms a volume.

Organic India can lower LDL cholesterol, reduce blood pressure, and promote heart health as part of a healthy diet. It is most commonly used to relieve constipation, IBS, ulcerative colitis, Crohn’s disease, and general gastrointestinal conditions.

Organic Psyllium from Organic India is the Plantago ovata herb seed coat. Whole psyllium pods are natural fibers that form a volume. Promotes healthy excretion and regularity, contains soluble and insoluble fiber, is compatible with the entire gastrointestinal system, soluble psyllium fiber, and a healthy diet can reduce heart disease risk.


  • USDA-certified
  • Vegan, dairy-free, GMO-free, gluten-free
  • No sugar and no artificial sweeteners.
  • Kosher & Halal certified.


  • Doesn’t mix easily
  • Bad taste
Best insoluble fiber supplement for constipation
Pic: Amazon

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