Can Fiber Supplements Cause Constipation

Can Fiber Supplements Cause Constipation

Posted by DrNatura® on Jun 14th 2023

What is Fiber?

Fiber is a form of carbohydrate that cannot be digested by the body. Unlike other carbohydrates, fiber cannot be broken down into sugar molecules; instead, it passes through the body undigested.

Fiber is well known for its ability to prevent or relieve constipation. In addition, fiber can also offer many other health benefits, including maintaining a healthy body weight and reducing the risks of heart disease, diabetes, and some types of cancer.

Types and Sources of Fiber

There are two types of fiber available based on their properties:

  • Soluble Fiber: Soluble fiber is a type of fiber that dissolves in water to form a gel-like substance that can aid in the reduction of blood cholesterol and glucose levels. Soluble fiber is mostly found in oats, peas, apples, beans, citrus fruits, carrots, barley, and psyllium.
  • Insoluble Fiber: Insoluble fiber, on the other hand, does not dissolve in water, which causes it to bulk up the stool and facilitate better material flow through the digestive system. It is helpful for people who experience constipation and irregular stools. Insoluble fiber can be found mostly in whole-wheat flour, wheat bran, beans, nuts, and vegetables, including potatoes, cauliflower, and green beans.

Ideal Fiber Intake

The ideal fiber intake varies on gender, age, and pregnancy status. According to the Academy of Nutrition and Dietetics, following amount of daily fiber intake is recommended:

  • 38 g daily for male adults
  • 25 g for adult women daily
  • Less fiber intake after 50 (21 g for women, 30 g for males)
  • When expecting or lactating, consume additional fiber (at least 28 g daily)

However, consuming more than 70 g of fiber per day might result in negative side effects, which some people may already experience after only consuming 40 g.

Symptoms and Side Effects of High Fiber Intake

Without a doubt, eating enough fiber is beneficial for digestive health. But excess of it can also be hazardous. In general, problems caused by eating more fiber is very rare than eating little. There are numerous symptoms and adverse effects than constipation that can be caused by eating extra dietary fiber, some of which are listed here.

  • Bloating
  • Gas
  • Stomach Cramps
  • Diarrhea
  • Dehydration
  • Poor Absorption Of Some Key Nutrients
  • Weight Gain Or Loss
  • Nausea

Understanding Constipation

Constipation is one of the most common digestive issues. It happens when feces are difficult to pass and bowel movements become less frequent. In addition, there are a few additional signs and symptoms that go along with constipation, such as bloating, abdominal pain, and straining during bowel movement. If you experience significant pain, blood in your stools, or constipation that persists for more than three weeks, you should consult with your doctor.

Causes of Constipation

Constipation can be caused by a variety of factors, including prescription drugs, medical problems, and pregnancy. It is frequently brought on by lifestyle factors like:

  • Eating low-fiber meals
  • Consuming more than recommended amount of fiber
  • Dehydration from not drinking enough water
  • Not doing proper exercise
  • Changing your daily schedule, such as traveling, eating, or sleeping at different times
  • Consuming a lot of milk or cheese.
  • Stress
  • Avoiding going to the bathroom

Importance Of Fiber In Preventing Constipation

As we have mentioned earlier, dietary fiber is a form of non-digestible carbohydrate present in many plant foods, including vegetables, fruits, nuts, grains, and seeds. And is classified into two types based on their properties of solubility, i.e., soluble and insoluble dietary fiber.

Consuming enough fiber in your diet is very important for the health of your digestive system even if your body cannot digest it. This is because it makes your stool softer and increases its size which ultimately moves it more quickly and easily through your bowl.

Importance Of Soluble Fiber In Preventing Constipation

Soluble fiber absorbs water and forms a gel-like substance that will help your stool move more smoothly through your bowels and improves its consistency.

Importance Of Insoluble Fiber In Preventing Constipation

Insoluble fiber makes your stool more bulky and functions like a brush in your bowels, cleaning everything out and keeping things going.

However, using more than enough fiber may cause constipation and many other side effects and symptoms.

Importance of Fiber in Preventing Constipation

Research on Fiber Supplements and Constipation

Several research has been undertaken to better understand how fiber supplements affect bowel motions. Fiber supplements have been found in trials to assist regulate bowel motions and deal with constipation. Fiber supplements, when taken on a regular basis, may add weight to the stool, making it simpler to transit through the digestive tract. They can also assist to prevent or treat constipation by increasing the frequency of bowel movements.

While both dietary fiber and fiber supplements can help with constipation, they have notable differences. Dietary fiber derived from whole meals is often thought to be more healthy because it is combined with other nutrients. Whole foods also contain a range of fibers that help general wellness. However, if getting enough fiber through diet alone is problematic, fiber supplement powder can be a practical solution.


In conclusion, fiber is a type of carbohydrate that our bodies cannot digest. It aids in the healthy functioning of our digestive system and has numerous health benefits. Fiber is classified into two types: soluble fiber, which dissolves in water and lowers cholesterol and glucose levels, and insoluble fiber, which adds weight to our stool and aids with constipation. The amount of fiber we require is determined by age, gender, and pregnancy status.

Constipation is a frequent condition that occurs when it is difficult to pass stool. It can be caused by a variety of circumstances, including a lack of fiber, hydration, and exercise. Fiber is important in reducing constipation because it softens and expands stool, allowing it to travel more easily through the colon. Soluble fiber absorbs water and aids in the smooth movement of the stool, but insoluble fiber adds bulk and keeps things going. It's critical to get the appropriate quantity of fiber since too much or too little might be harmful. In addition to constipation, excess fiber consumption can cause bloating, gas, stomach cramps, and diarrhea. It can also prevent critical nutrients from being absorbed and cause weight fluctuations.

Fiber supplements have been investigated by researchers and proven to assist regulate bowel motions and alleviate constipation. However, consuming fiber from whole foods is generally seen to be better because they also include other essential nutrients. If getting enough fiber from diet alone is challenging, fiber supplements can be a practical choice.

Disclaimer: If you have any concerns about constipation or your digestive health, it's best to consult with a doctor before using fiber. They can provide guidance and advice based on your specific situation. This information can not substitute any professional doctor’s advice.