Sticky Stool: Is It Digestive Issues from High Protein Diet?

Is the sticky consistency of stool after a bowel movement due to overeating and resulting in indigestion?

Hello Doctor, during my muscle-building phase, I need to consume protein equivalent to 1.6 times my body weight and 4-5 times the amount of carbohydrates.
For the past three months, my bowel movements have been very regular in shape, and the volume has increased compared to before I started working out.
I have been having regular bowel movements after breakfast, close to noon, and I have gained muscle mass rapidly (3 kg of skeletal muscle weight in three months).
However, in the past six days, I have experienced a sudden urge to have a bowel movement first thing in the morning, followed by diarrhea with a mushy consistency at the end of the stool.
The next day, my bowel movements return to normal, and this has repeated three times.
Could this be due to indigestion or intestinal inflammation? Recently, I have intentionally increased my starch intake, especially taro, and I suspect that my gastrointestinal health may not be optimal (as I used to eat less, leading to being underweight).
Should I adjust the quantity or type of food in my diet, or is there a possibility of underlying gastrointestinal pathology? I am particularly concerned due to a family history of colorectal cancer, which is why I have been taking probiotics and have regular annual stool occult blood tests that are normal.
I hope to prepare my body for a colonoscopy after turning 40.

Xiao Xin, 30~39 year old female. Ask Date: 2022/10/04

Dr. Chen Shidian reply Gastroenterology and Hepatology

It is likely due to the food (taro), so it is recommended to make adjustments first.

Reply Date: 2022/10/04

More Info

Understanding sticky stool and digestive issues, especially in the context of a high-protein diet, can be complex. It’s important to recognize that while protein is essential for muscle growth and overall health, an imbalance in your diet can lead to gastrointestinal disturbances.

From your description, it seems that you have been consuming a significant amount of protein (1.6 times your body weight) and carbohydrates (4-5 times), which is common among those looking to gain muscle mass. Initially, your bowel movements were regular and healthy, but you’ve recently experienced episodes of sticky, mushy stools, followed by periods of normalcy. This fluctuation could indicate a few potential issues.

1. Dietary Fiber Intake: One of the most common reasons for digestive issues, even in high-protein diets, is insufficient dietary fiber. While protein is crucial for muscle repair and growth, fiber is essential for maintaining healthy bowel function. A diet low in fiber can lead to constipation or irregular bowel movements. Ensure you are incorporating enough fruits, vegetables, and whole grains into your diet to meet your fiber needs.

2. Food Sensitivities: The introduction of more starches, particularly if they are new to your diet, could also be a factor. Foods like taro (芋頭) can be high in carbohydrates and may cause digestive upset if your body is not used to them. It’s possible that your gastrointestinal system is reacting to these changes, leading to symptoms like diarrhea or sticky stools.

3. Hydration: Adequate hydration is crucial, especially when consuming a high-protein diet. Dehydration can lead to harder stools and constipation, while excessive water intake without sufficient electrolytes can cause loose stools. Make sure you are drinking enough water throughout the day.

4. Gut Health: You mentioned taking probiotics, which is a good step toward maintaining a healthy gut microbiome. However, if you are experiencing persistent digestive issues, it might be worth consulting with a healthcare professional to evaluate your gut health further. They may recommend specific strains of probiotics or dietary adjustments.

5. Potential Inflammation: The symptoms you describe could also suggest mild inflammation in the gut, possibly due to dietary changes or an underlying condition. If you have a family history of colorectal cancer, it’s wise to be vigilant about any changes in your bowel habits. Regular screenings and consultations with a healthcare provider are essential.

6. Monitoring Symptoms: Keep a food diary to track what you eat and how it correlates with your bowel movements. This can help identify any specific foods that may be triggering your symptoms.
7. Consulting a Professional: Given your family history and the recent changes in your bowel habits, it would be prudent to consult a gastroenterologist. They can provide a thorough evaluation, including tests if necessary, to rule out any serious conditions.

In summary, while a high-protein diet can support muscle growth, it’s crucial to balance it with adequate fiber, hydration, and attention to how your body responds to dietary changes. Monitoring your symptoms and consulting with healthcare professionals will help ensure that your digestive health remains optimal as you pursue your fitness goals.

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