
Diarrhea is often caused by a virus or bacteria that the body is trying to flush out. However, it can also be caused by specific foods, with different triggers for different people. For example, lactose intolerance, which is common worldwide, can cause diarrhea after the consumption of dairy products. Other common triggers include spicy foods, caffeine, and sugar. Fructose, a sugar found in fruits, can cause diarrhea if consumed in large quantities. Therefore, a diet with a high fruit content could cause diarrhea, depending on the type of fruit and the quantity consumed.
| Characteristics | Values |
|---|---|
| Diarrhea caused by changing diet | Usually not concerning, but could be due to other factors such as infection, medication, or a functional condition |
| Diarrhea triggers | FODMAP foods, insoluble fiber, fructose, lactose, raffinose, sorbitol, starches, gluten, carbohydrates, fats, proteins, spicy food, sugar, artificial sweeteners, caffeine, lactose-containing foods, fried food, greasy food, fatty food |
| Diarrhea treatment | BRAT diet, bland diet, low fiber diet, over-the-counter medications, home remedies, probiotics, antibiotics, adequate hydration |
| Diarrhea diagnosis | Food and symptom diary, elimination diet, consulting a doctor |
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What You'll Learn

Fructose intolerance
Fructose is a natural sugar found in fruits, some vegetables, and honey. Fructose intolerance is a condition that affects a person's ability to digest this sugar. The two types of fructose intolerance are dietary and hereditary.
Hereditary fructose intolerance is a genetic disorder caused by mutations in the ALDOB gene. It impairs the body's ability to produce the enzyme aldolase B, which is needed to break down fructose. This type of fructose intolerance is inherited in an autosomal recessive pattern, meaning both parents must carry the mutated gene for their child to be affected. New cases are rarely diagnosed in adults, with infants typically showing signs of intolerance when introduced to fructose-containing foods. Symptoms of hereditary fructose intolerance include nausea, bloating, abdominal pain, diarrhea, vomiting, and low blood sugar. Continued exposure to fructose can lead to seizures, coma, and even death from liver and kidney failure.
Dietary fructose intolerance, also known as fructose malabsorption, occurs when the cells in the intestines cannot absorb fructose properly. This condition typically develops in adults and is characterized by symptoms similar to irritable bowel syndrome (IBS). These symptoms can include diarrhea, bloating, constipation, flatulence, and stomach pain.
If you suspect you have fructose intolerance, it is important to consult a doctor for proper testing and diagnosis. They may recommend a diet low in fructose or suggest trying an elimination diet to identify specific trigger foods. Treatment options may include over-the-counter medications, home remedies, or probiotics to help manage symptoms and promote digestive health.
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High-FODMAP fruits
FODMAP is an acronym for fermentable oligo-, di-, mono-saccharides, and polyols. These are the scientific names for carbs that may cause digestive issues. High-FODMAP fruits contain high levels of fructose and sorbitol, which are natural polyols. The body can only digest a certain amount of fructose at one time, and consuming more than that may cause diarrhea.
Fruits that are particularly high in fructose include apples, pears, mangoes, cherries, figs, nashi pears, watermelon, and dried fruit. Fruits rich in sorbitol include apples, blackberries, nashi pears, peaches, and plums. Other high-FODMAP fruits include garlic and onions, which are especially high in FODMAPs.
If you are experiencing diarrhea, it is important to assess your diet and identify any potential triggers. Keeping a food and symptom diary can help determine which foods may be causing diarrhea. High-FODMAP foods can cause gastrointestinal symptoms such as abdominal pain, gas, and bloating, and are more likely to cause diarrhea. Therefore, it is recommended to limit the consumption of high-FODMAP fruits and opt for low-FODMAP alternatives.
It is worth noting that not all fruits are considered high-FODMAP, as some contain less fructose or have higher amounts of glucose, which helps the body absorb fructose. Sensitive individuals should aim for single portions of fruit per sitting, approximately 3 ounces (80 grams), to avoid potential gut symptoms.
In addition to dietary modifications, staying hydrated is crucial when experiencing diarrhea. Drinking plenty of liquids, especially those with sugar or salt, such as Pedialyte or full-salt soups, can help prevent dehydration. It is also recommended to try home remedies and over-the-counter medications to alleviate symptoms.
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Gut flora adjustment
The human gut contains about 200 different species of bacteria, viruses, and fungi, collectively known as the gut microbiome. This microbiome contributes to our health by making vitamins, fighting infections, and even helping to activate drugs. The gut breaks down the foods we eat and absorbs nutrients that support our body's functions.
The gut microbiome can be affected by many factors, including the foods we eat, our environment, age, birth mode, and whether we were breastfed or formula-fed as a baby. A diet high in processed foods and added sugars can decrease the amount of "good" bacteria and diversity in the gut, leading to inflammation and an increased risk of diseases such as cancer.
On the other hand, dietary fiber in foods can improve gut health by helping to keep us regular, reducing the risk of bowel cancer, and feeding the healthy bacteria in our gut. Whole foods, such as fruits, vegetables, legumes, whole grains, and nuts, may prevent the growth of harmful bacteria linked to diseases and inflammation.
When making significant dietary changes, such as increasing fruit intake, it is important to be mindful of potential gut flora adjustments. Introducing new foods gradually and increasing the intake slowly can help the gut adjust and reduce the risk of digestive issues such as diarrhea.
If diarrhea occurs, it is important to stay hydrated and assess the diet for any potential triggers. Keeping a food and symptom diary can help identify links between certain foods and diarrhea symptoms. Probiotics, which are beneficial bacteria that live in the gut, may also help reduce diarrhea symptoms and improve gut health.
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Food intolerances
Lactose intolerance is the most common food intolerance. Lactose is a sugar found in milk and dairy products, and those who are intolerant do not produce enough of the enzyme lactase to break it down. Other common intolerances include histamine intolerance, gluten intolerance, and non-celiac gluten sensitivity. Histamine is a naturally occurring chemical found in foods like cheese, pineapple, bananas, avocados, chocolate, and wine. People with gluten intolerance may experience abdominal pain, bloating, and headaches when consuming gluten, which is a protein found in wheat, barley, rye, and triticale.
While not directly mentioned in the search results, it is possible that an abrupt change to a diet consisting mainly of fruit could potentially lead to diarrhoea if the fruit contains high levels of fructose or other compounds that may have a laxative effect. However, this is speculative, and further research is needed to confirm this.
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BRAT diet
A diet consisting mainly of fruit can cause diarrhoea, especially if it contains fruits with high levels of fructose. Fructose is a type of sugar that occurs naturally in fruits, and consuming more fructose than the body can process leads to diarrhoea. Other types of sugars and artificial sweeteners can also have a laxative effect.
To treat diarrhoea, it is important to stay hydrated. Drinking water is good, but consuming liquids with sugar or salt, such as sports drinks or rehydration solutions, can help replace lost electrolytes.
One way to treat diarrhoea is to follow the BRAT diet, which stands for Bananas, Rice, Apples, and Toast. The BRAT diet was often recommended for nausea, vomiting, and diarrhoea, but is no longer advised due to its restrictive nature. Instead, it is suggested to eat a mix of fruits, vegetables, meat, yogurt, and complex carbohydrates.
The BRAT diet consists of foods that are bland and gentle on the stomach. Bananas, rice, applesauce, and toast are all part of the BRAT diet and can help solidify stools. Other foods that can be included in the diet are soft fruits like avocado and melon, steamed or boiled vegetables like carrots and potatoes, and low-fibre starches like white bread and saltine crackers.
It is important to note that the BRAT diet may not be the best option for children, as it is low in fiber, protein, and fat, and does not provide enough nutrition to help a child's gastrointestinal tract recover. Experts recommend that children resume a normal, well-balanced diet within 24 hours of getting sick.
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Frequently asked questions
Yes, it can. Fructose is a sugar that occurs naturally in fruits, and since the body can only digest small amounts of fructose at a time, eating too much fructose at once can cause diarrhea. Fruit is also a source of fiber, and a sudden increase in fiber intake can lead to diarrhea. It is important to note that everyone is different, and what might trigger diarrhea for one person might not be an issue for another.
Diarrhea can be caused by a variety of factors, including food intolerances, allergies, food poisoning, medication, infection, or a chronic condition like irritable bowel syndrome (IBS). Certain foods can also trigger diarrhea, such as fatty, greasy, or fried foods, lactose-containing foods, spicy foods, and caffeine.
Keeping a food and symptom diary can help identify links between certain foods and diarrhea symptoms. An elimination diet, with the guidance of a healthcare provider or dietician, can also help determine trigger foods.
Treatment for diarrhea can include a combination of over-the-counter medications, home remedies, and dietary changes. Staying hydrated is crucial when experiencing diarrhea, and drinking plenty of liquids can help replace lost fluids. Eating bland, low-fiber foods can also help, such as oatmeal, bananas, plain rice, and applesauce.
Diarrhea usually goes away on its own after a few days. However, if diarrhea lasts longer than 2-4 days, is accompanied by blood in the stool, severe stomach pain, or other concerning symptoms, it is important to consult a doctor to determine the underlying cause and receive appropriate treatment.










































