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Signs and Symptoms of Excessive Fibre Consumption: How Much Is Too Much?

Signs and Symptoms of Excessive Fiber Consumption: How Much Is Too Much?

Plant-based foods contain dietary fibre linked to numerous health advantages, such as reducing the chances of developing heart disease and promoting stable blood sugar levels. Improving gut health is also a known benefit of consuming fibre. It is generally recommended to increase fibre intake in one’s diet, as many processed foods in the American diet lack sufficient amounts of fibre. Approximately 95% of Americans do not meet the recommended fibre intake for adults and children.

Ingesting an excess amount of this substance also poses potential hazards. Dietary fibre is derived from specific carbohydrates found in plants that the body cannot digest. It is divided into two types: soluble and insoluble fibre. Soluble fibre dissolves in water, creating a gel-like consistency in the intestines, which aids in the smooth movement of food through the digestive system. Insoluble fibre adds bulk to faecal matter, making it softer and easier to eliminate.

Both kinds of fibre have potential benefits for enhancing overall health. Nevertheless, a high-fiber diet may not be suitable for everyone. Additionally, consuming excessive amounts of fibre can pose certain health hazards. If you suddenly or excessively increase your fibre consumption, you may encounter unpleasant or even severe adverse effects.

Continue reading to discover the potential effects of consuming excessive amounts of fibre on your body and the recommended daily intake.

Abdominal Swelling and Flatulence

Consuming excessive amounts of fibre can lead to gastrointestinal discomfort, including symptoms such as gas and bloating. A high intake of fibre-rich foods, especially when initially increasing fibre intake, can cause a distended stomach, flatulence, and diarrhoea. These are common side effects that may occur.

One may experience this condition by consuming a significant quantity of fibre in a single meal or by rapidly increasing their fibre intake. Typically, this adverse effect improves as the gut microbiome adapts to the additional fibre.

Deficiencies in Essential Minerals

Consuming an excessive amount of fibre can disrupt the absorption process of various crucial minerals such as calcium, iron, magnesium, and zinc. This occurs because fibre acts as a binding agent that can hinder the body’s absorption of these minerals from the foods consumed.

Most individuals should not face any issues with consuming high-fibre foods, as they are typically also rich in minerals. However, certain individuals may be at risk of mineral deficiencies. Eating foods that are high in these specific minerals, such as meat, can help supplement the body with additional minerals to counteract this problem.

The issue with Bowel Movements

While it is believed that incorporating fibre into one’s diet can aid in alleviating constipation, this is not always effective for everyone. In certain instances, consuming fibre may even exacerbate the issue. Research has shown that including fibre in one’s diet can potentially improve constipation symptoms, while other studies suggest that reducing fibre intake may be more beneficial.

Previous research has also revealed that individuals with persistent constipation consume comparable levels of fibre as those without constipation. Therefore, if your constipation is not due to a deficiency of fibre, such as taking specific medications, experiencing irritable bowel syndrome (IBS), or being dehydrated, increasing your fibre intake would not provide relief and could potentially exacerbate your condition.

Bowel Obstruction

Although uncommon, excessive intake of fibre can lead to a condition called bowel obstruction, where undigested fibres or faecal matter become trapped in a narrow section of the intestines, resulting in discomfort and requiring immediate medical attention.

An obstruction in the intestines can occur when undigested fibre from fruits or vegetables clumps together, preventing anything from passing through. This risk is higher for elderly individuals who do not properly chew their food. In severe cases, surgery may be necessary to address this serious condition.

What is the recommended daily intake of fibre?

There is no fixed maximum limit for consuming fibre, indicating that there is no specific quantity that can be deemed harmful to your health. The ideal daily intake of fibre varies based on your age and gender, as well as your requirements and tolerance. The recommended average amount may not be suitable for everyone.

According to the Dietary Guidelines for Americans, it is recommended to consume 14 grams of fibre for every 1,000 calories of food. This translates to approximately 28 grams of fibre per day for the average adult, to be distributed among all meals and snacks.

Nonetheless, this is merely a typical value, and it is advisable to explore various quantities of fibre until you discover the most suitable amount for your body.


As per the suggested recommendations, the typical female adult should consume approximately 25 grams of dietary fibre every day. However, the required amount may vary based on individual factors such as body size and age. For individuals over the age of 50, it is advised to consume a minimum of 21 grams of fibre daily.


On average, a grown man requires approximately 38 grams of fibre daily. However, this amount may vary based on individual requirements, body size, and age. For individuals over 50 years old, it is recommended to consume at least 30 grams of fibre each day.


The age and size of children and teenagers vary greatly, making them a challenging group to provide recommendations for. According to official guidelines, older children and teenagers should aim to consume between 21 and 38 grams of fibre daily.

It may be challenging to reach this target, as certain youngsters and adolescents consume smaller quantities of food. A possible solution to aid this demographic in boosting their fibre consumption is to prioritize high-fibre options such as nuts, legumes, whole grains, fruits, and vegetables.

Scheduling a Visit with Your Healthcare Provider

If you frequently encounter unpleasant gastrointestinal issues such as flatulence, bloating, loose stools, or difficulty passing stool, it is advisable to consult with your healthcare professional.

If you are having difficulty finding the right balance of fibre in your diet, your healthcare provider can assist you in determining the appropriate amount of fibre to incorporate into your meals. They can also provide suggestions on which foods to add or remove from your diet.

For individuals with a history of gastrointestinal issues such as an injury, celiac disease, previous bowel obstruction, diverticulitis, or any absorption disorder, consulting a gastroenterologist can assist in achieving an appropriate amount of fibre in their diet. Gastroenterologists are doctors who specialize in the well-being of the gastrointestinal system.

A Brief Overview

A large portion of individuals in the United States do not meet their recommended daily fibre intake; therefore, increasing fibre consumption in one’s diet is often beneficial. However, the quality and frequency of fibre consumption are important factors to consider.

Consuming excessive amounts of fibre or rapidly increasing your fibre consumption can lead to unpleasant and potentially severe consequences, including bloating, constipation, and deficiencies in essential minerals.

If you are thinking of increasing your fibre intake, it is important to discuss it with your healthcare provider.

Commonly Asked Questions

  • What are some recommended food choices for increasing fibre intake?

Fibre can be found in all types of plant-based foods; however, certain foods contain a higher amount of fibre, such as beans, artichokes, berries, split peas, lentils, chia seeds, and avocados.

  • What is a gradual way to boost my fibre consumption?

Begin by substituting refined grains for whole grains. Additionally, you can incorporate one high-fibre food into your daily diet, as long as it agrees with your gastrointestinal system.

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