Can Weight Loss Cause Diarrhea And Why?

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Weight Loss

Marlon Emmanuel Mcleod

December 1, 2022

When you have diarrhea, do you lose weight? Your answer is yes. But is it a natural or healthy method of weight loss? Or is it something about which you ought to be concerned? Well, it might not be a smart choice if you want to lose weight permanently, steadily, and sustainably.

Nearly everyone has had diarrhea at some point in their lives. The symptoms are uncomfortable even if the ailment is not severe and only lasts a short while. Many people experience diarrhea when they lose weight. But why does this happen, and is there anything you can do about it?

Here in this blog post, we will show you what diarrhea is and its different types. We’ll also explore the causes of diarrhea during weight loss and share some tips for how to deal with it. So read on to uncover everything about weight loss and diarrhea so you can make the proper decisions for your health.

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Why Does Diarrhea Cause Weight Loss?

Diarrhea can lead to weight loss by causing a rapid loss of fluids. Diarrhea causes water and electrolyte imbalances in the body, which reduces muscle and organ function. Dehydration can result from this, and since your body can’t absorb enough nutrients from food due to a lack of fluids, it can lead to weight loss.

Additionally, diarrhea can cause malabsorption, which is when the body system is unable to absorb nutrients from food due to inflammation or damage in the digestive tract. This can also lead to weight loss as your body cannot access the necessary nutrients for energy and growth.

Diarrhea can also be a sign or symptom of an underlying medical condition such as Crohn’s disease or celiac disease, both of which can cause malabsorption and weight loss.

If you are experiencing frequent bouts of diarrhea, it’s important to speak with a healthcare professional as soon as possible to specify the underlying cause and create a treatment plan. With the right diagnosis and treatment plan, you can restore balance to your digestive system and maintain a healthy weight.

How Diarrhea Causes Weight Loss?

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When chronic diarrhea lasts more than a week or two, a person loses a lot of fluids. Your weight may be impacted by fluid loss in the body. As a result of the other symptoms of the disease, such as nausea and loss of appetite, it is difficult to hold food and liquid nutrients in the stomach.

These symptoms will cause a reduction in calorie intake, assisting the unintentional weight loss process. The amount of time and severity of diarrhea affect the pace of weight loss. However, any weight loss as a result of diarrhea is mostly water weight. You will regain the lost weight after your bowel movements and appetite return to normal.

Treatment of diarrhea can also involve taking antibiotics, antiviral medications, or antifungal medicines. If a person experiences chronic weight loss due to diarrhea, it is advisable to consult a doctor for the best action.

Additionally, depending on the sort of diarrhea you have, you may lose weight. Acute and chronic diarrhea are the two forms, and each has a different mechanism for weight loss. Here is the full brief:

Acute Diarrhea:

Acute diarrhea is a common medical condition that generally lasts for a few days and can be caused by an infection in the gastrointestinal tract. Frequent watery bowel movements and abdominal cramps typically characterize it. Common causes of acute diarrhea include:

  • Bacterial or viral infections.
  • Food intolerances or allergies.
  • Certain medications.
  • Eating contaminated food.

In most cases, acute diarrhea can be treated effectively at home with simple lifestyle changes and over-the-counter medications. Still, in some cases, more serious medical attention may be necessary. It’s important to take note of any other symptoms that may accompany diarrhea, such as fever or abdominal pain, and seek medical attention if they persist.

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Chronic Diarrhea:

Chronic diarrhea is defined as an increase in the frequency, volume, or fluidity of stools that persists for longer than two weeks. It can be a symptom of many different disorders, ranging from mild to severe.

Compared to acute diarrhea, chronic diarrhea is more persistent and can last for several weeks or even months. It can come and go in cycles, with periods of remission followed by relapse. In order to properly diagnose chronic diarrhea, it’s important to seek medical attention from your healthcare provider as soon as possible.

What Are The Causes Of Weight Loss During Diarrhea:

Here is the list of causes there are directly or indirectly related to weight loss during diarrhea:

Inflammatory Bowel Disease (IBD):

Crohn’s disease and ulcerative colitis are examples of inflammatory bowel diseases that have an impact on the digestive system and its regular operation. As a result, it hinders the absorption of nutrients, leading to anemia and weight loss.

People with IBD often find that they can’t eat large amounts at one time and may not have a good appetite. As a result, calories consumed are limited, leading to weight loss over time.

Celiac Diseases:

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Celiac disease, often called gluten intolerance, is an immune-mediated disorder that triggers an immunological reaction to the particular protein gluten. As a result, it may seriously damage intestinal walls, which might lead to nutritional malabsorption, Diarrhea, and weight loss.

It also has an effect on nutrient absorption, leading to deficiencies in vitamins and minerals. This can lead to anemia and further weight loss, as the body is not able to get all of the right nutrients it needs because of malabsorption.

Chronic Illnesses:

Constant contact with bacterial or parasitic-infested water and food can cause chronic microbial illnesses and recurrent Diarrhea. It harms the intestines, as a result, causing malnutrition and unanticipated weight loss.

Chronic disease can also be caused by long-term usage of certain drugs, such as antibiotics and anti-inflammatory medications. In addition to causing gastrointestinal problems, these drugs can interfere with the body’s proper absorption of necessary nutrients.

Malabsorption Syndrome:

The body lacks several digestive enzymes when this disease is present. As a result, the food remains undigested and unabsorbed. Additionally, it may eventually cause weight loss as a result of starvation. Similarly to this, damage to the gut wall may prevent nutrients from being absorbed, which will cause weight loss.

A person who has this condition may also suffer from anemia and fatigue due to the lack of important nutrients. Their energy levels may suffer, resulting in additional weight loss because they are not able to perform their daily activities.

Lactose Intolerance:

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Milk and other dairy products naturally contain the sugar lactose. However, the majority of people have Diarrhea after ingesting dairy products due to lactose intolerance and an inability to digest lactose. Additionally, the undigested lactose will upset the digestive system, resulting in short-term weight loss and stomach discomfort.

It also leads to bloating and gas as the undigested lactose ferments in the intestines. People who are lactose intolerant may also experience nausea, vomiting, and cramping after consuming dairy products. You must consult your doctor to get a proper diagnosis if you may be lactose intolerant.

The Keto Diet:

It’s difficult for your body to metabolize the food when you follow the keto diet, which is super heavy in fat and low in carbohydrates. It will ultimately cause Diarrhea, which will have an impact on your weight and general health.

While it’s possible to relinquish weight on the keto diet, it is important to monitor your intake of food and watch your electrolytes closely. Additionally, you should consider supplementing with a multivitamin-mineral to make up for any deficiencies or imbalances the diet may cause.

What Procedures Used To Determine Diarrhea:

Diarrhea is often determined by evaluating a person’s recent diet and activities, as well as symptoms such as frequent loose stools, abdominal cramps, pain, bloating, nausea or vomiting. But in some cases, additional tests may be needed to rule out other causes. Common examinations or procedures used to determine diarrhea include:

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Stool Test:

A sample of your stool will be tested for the presence of bacteria, parasites, or viruses that can cause diarrhea. This test can identify a wide range of infectious organisms, such as E. coli, rotavirus, and giardia. The results can provide essential information on the cause of your symptoms and help guide treatment options.

Blood Tests:

Blood tests may be used to measure levels of electrolytes like sodium or potassium that can become unbalanced due to dehydration caused by diarrhea. They can also detect the presence of other substances that point to a specific cause, like celiac disease or inflammatory bowel disease (IBD).


A lengthy, thin tube with a camera on it is threaded up the intestine during this surgery through the anus. It is employed to collect tissue samples and photos. This examination can reveal any sores, ulcers, abnormal growths, or signs of bleeding and whether the tissue is inflamed. When combined with stool tests, colonoscopy results can help determine the cause of diarrhea and provide information on treatments.

Imaging Tests:

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Imaging tests such as X-rays or CT scans may be utilized to detect intestinal inflammation or blockages, which are often associated with diarrhea. These scans also allow doctors to check for any abnormalities in the digestive system, such as polyps, tumors, or abscesses.


This is similar to a colonoscopy but utilizes a flexible tube with a camera and glow light at one end that is inserted through the mouth. By looking inside the upper part of the intestine, doctors can identify any areas of inflammation or blockage and take samples for further testing. Endoscopy can also be used to check for celiac disease and other causes of diarrhea.

Overall, various procedures are available to diagnose the cause of diarrhea and determine the most appropriate treatment plan. Ask your doctor about what tests would be best for you. It’s important to discuss any questions or concerns you may have before proceeding with any examinations. You can receive the best possible care for your condition with the right diagnosis.

Tips To Deal With Weight Loss Cause By Diarrhea:

Living with severe and uncomfortable diarrhea for several days or even a week can be difficult. It will also result in accidental weight loss. It may result in a number of health issues, such as weariness, malabsorption, and inadequate nutrition.

Here are a few practical tips for managing weight loss that is caused by diarrhea.

Drink Plenty of Water:

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Dehydration has been linked to weight loss. When you have diarrhea, drinking plenty of fluids is essential for reducing the symptoms and maintaining your body hydrated. Water is the best source for hydrating your body, but more is needed when a lot of fluid is lost from the body due to diarrheal stools.

You can have sugar-free sports drinks or other electrolyte beverages as well. You can also have fruits and vegetables that are rich in water, like cucumber, celery, tomatoes, oranges, etc. However, remember not to drink too much water or any other drink at once, as it might make you feel worse.

Eat Smaller Meals:

Eating small meals more frequently can help you to get adequate nutrition without causing much strain on your digestive system. Try eating six to eight smaller meals per day rather than three larger ones because it will reduce the risk of developing further digestive problems.

You should also try adding calorie-rich liquid foods to your diet, such as smoothies, milkshakes, and soups. This will provide you with a lot more energy without overloading your digestive system. When you do eat solid foods, make sure they are easy to digest, like fruits, vegetables, and grains.

Get Regular Exercise:

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Regular exercise is essential for maintaining a healthy weight and building muscle mass. Make sure to take up some light physical activities to help you stay fit without over-exerting. Low or moderate-intensity exercises such as walking, cycling, swimming, and yoga can be particularly helpful.

You can also use resistance bands and weights to build muscle strength. If you cannot exercise regularly due to fatigue, try taking short breaks throughout the day for stretching and relaxation. Maintaining muscle strength can help combat the weight loss that diarrhea might cause.

Eat High-Calorie Foods:

When you lose weight due to diarrheal stools, you must focus on eating foods high in calories. These can include nut butter, avocados, coconut oil, nuts, and seeds like almonds, walnuts, and flaxseeds. You can also have legumes like chickpeas, lentils, and beans. Dairy products, eggs, fish, and lean meats are also sources of high-calorie foods.


Probiotics are sources of “good” bacteria that help to maintain a wholesome environment in your digestive system. They are essentially living microbes that may be found in some foods, such as beet kvass, green olives, kefir, and aged soft cheeses. Probiotics are also available as pills or powders.

For your digestive system to operate normally, you need the beneficial bacteria that dwell in your intestinal tract. They are crucial in defending your intestines against infection. You can experience diarrhea if your system is altered by drugs or overrun by harmful bacteria or viruses.

Probiotics can treat diarrhea by re-establishing the balance of microorganisms in your stomach. In situations of diarrheal illness, it’s critical to get the medical attention you need. Prior to using probiotic pills to treat diarrhea, see your doctor.

Avoid Sugar:

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Sugars are quickly absorbed by our digestive system and can worsen diarrhea symptoms because they can pull water into the intestine. Avoiding foods such as candy, ice cream, and sodas may help ease diarrhea symptoms.

Another issue that sugar can create with diarrhea is that it can lead to nutrient deficiencies, so it is important to eat complex carbohydrates such as brown rice, grains, potatoes, and other starchy vegetables.

Rice Water:

Another quick and effective treatment for diarrhea is rice water. 2 cups of water and 1 cup of rice should be brought to a boil for about 10 to 12 minutes or until the water turns hazy. Rice should be strained, and the water should be saved for drinking.

In addition to giving your body fluids to avoid dehydration, rice water helps shorten the frequency and length of diarrhea. In the digestive system, rice water has a binding action that causes harder, bigger feces.

It also helps restore electrolytes, like potassium & sodium, which are lost during diarrhea. Rice water is considered a safe treatment for most people, but it should not be used to treat dehydration in infants or young children. In these cases, oral rehydration solutions (ORS) are necessary.

Diet BRAT:

The BRAT diet has been shown to treat diarrhea effectively. BRAT stands for bread, rice, bananas, and applesauce. The bland flavor of these foods, plus the fact that they are starchy, low-fiber foods, make this diet beneficial.

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In the digestive tract, these foods have a binding action that makes feces more substantial. Additionally, they are less likely to aggravate diarrhea or irritate your stomach because they are bland.

You could consume potatoes, clear broth, and saltine crackers in addition to these (also bland) foods. It is important to stay away from dairy, caffeine, alcohol, and fatty or spicy foods for the duration of the diet. You could also incorporate water-soluble fiber like oat bran, wheat bran, rice cereal, quinoa, kamut cereals, etc.


Although weight loss can cause diarrhea in some people, it is not always the case. There are many potential causes of diarrhea, and you should speak to your doctor if you are experiencing this side effect frequently.

It is important to ensure you eat a balanced diet and drink plenty of fluids when you have diarrhea. Taking probiotics can also help restore balance to the gut bacteria that may be affected by weight loss.

Additionally, by exercising regularly, you can also gain weight that is decreased by diarrhea. Hope this guide gives you an idea of how weight loss can cause diarrhea and why.


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What are the symptoms of diarrhea?

The symptoms of diarrhea can vary depending on the cause but usually include watery and sometimes bloody stools, abdominal cramps, nausea, and vomiting. Fever may also be present. If you experience any of these signs, consult your physician as soon as possible.

What are some of the risks connected with diarrhea?

Diarrhea can lead to extreme dehydration, which can be serious if not treated. It can also lead to a loss of important electrolytes like potassium and sodium. In some cases, diarrhea can also be a sign of a more serious problem, like food poisoning or a bacterial infection.

Is it possible to lose weight without having any bouts of diarrhea?

It is possible to lose weight without having any bouts of diarrhea. However, it is not a healthy or sustainable manner to lose weight. Making short-term, sustainable changes to your eating and exercise routines is the finest way to lose weight and keep it off. More Blog And Follow YouTube Channel

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