The Scoop on Poop: What’s Normal, What’s Not & How to Improve Your Gut Health

by Valerie Polley | Feb 26, 2025 | 0 comments

Poop—it's not the most glamorous topic, but it's a crucial indicator of your overall health. Your digestive system is important for breaking down food, absorbing nutrients, and eliminating waste, so when something is off with your gut, your poop will likely reflect it.

Understanding what's normal, what's not, and how to improve your gut health can help you feel your best. In this article, we'll explore what makes a healthy poop, warning signs of digestive issues, and practical steps to improve your gut health.

What's Considered "Normal" Poop?

A healthy bowel movement varies from person to person, but there are a few characteristics that generally indicate good digestive health.

Frequency

Studies show that "going" anywhere from three times per day to three times per week is considered normal. The key is consistency—if the frequency of your bowel movements suddenly changes, it might be worth investigating.

Color

Healthy poop is usually brown due to bile, a digestive fluid that helps break down fats. Other colors can indicate various issues:

  • Green: May be due to diet (leafy green vegetables) or rapid movement of waste through the intestines. It can also indicate an infection.
  • Black or red: Can indicate bleeding in the digestive tract and should be checked by a doctor. However, red poop can also result from drinking things containing red food dye or eating beets.
  • Pale or clay colored: May indicate an issue with your liver, bile ducts, pancreas, or gallbladder.
  • Yellow: Could be an indication of pancreatitis or celiac disease.

Shape and Consistency

The Bristol Stool Chart categorizes poop into seven types based on their shape and texture. Types 3 and 4 (smooth, well-formed, and soft) are considered ideal. Having Type 1 or 2 stool can indicate constipation, while Type 6 or 7 stool can indicate diarrhea.

Smell

While poop naturally has an unpleasant odor, an extremely foul odor or sudden change in smell may indicate malabsorption, infection, or gut imbalances.

Signs of an Unhealthy Gut

If your poop is frequently abnormal, it could be a sign of underlying digestive issues. Here are some common concerns.

Chronic Constipation

If you struggle to have a bowel movement, experience hard poop, or have a bowel movement less than three times per week, you might have constipation. Common causes of constipation include dehydration, low fiber intake, certain medications (like opioids), pelvic floor dysfunction, or an underlying condition like irritable bowel syndrome (IBS).

Frequent Diarrhea

Loose, watery stools that persist for days or weeks can be caused by food intolerances, infections, or gut disorders like Crohn's disease or celiac disease (where your body mistakenly attacks gluten, the protein found in wheat, rye, and barley).

Unusual Colors

As mentioned above, significant changes in the color of your poop—especially black, red, or very pale—should be addressed by a healthcare professional.

Mucus, Undigested Food, or Floating Stool

Excessive mucus may be a sign of an inflammatory condition. While some undigested food in your poop can be a result of eating too quickly or not chewing your food properly, undigested food could indicate something is wrong if it's accompanied by diarrhea, weight loss, or other changes to your bowel habits. 

Floating stools can sometimes be linked to fat malabsorption or an infection.

Persistent Bloating, Gas, or Abdominal Pain

Occasional bloating and gas are normal, but if they're constant or cause significant pain, they could indicate food sensitivities, small intestinal bacterial overgrowth (SIBO), or other digestive issues.

Improving Gut Health for Better Poop

If you're experiencing digestive issues like constipation, gas, and bloating, making simple changes to your diet and lifestyle can support better digestion and more regular bowel movements.

Increase Fiber Intake

There are two main types of fiber—soluble and insoluble. Soluble fiber, which is found in foods like oats, oat bran, barley, chia seeds, and psyllium husk, forms a gel-like substance in the intestine and slows down digestion. It can also be helpful if you're experiencing diarrhea, as it soaks up excess water in the bowel, leading to more formed stool.

Insoluble fiber, which is found in legumes, wheat bran, and the skins of fruits and vegetables, does not absorb water, but it adds bulk to the stool and causes waste to move through the bowel faster. It can be particularly helpful if you're struggling with constipation. 

In general, women need about 25 grams of fiber daily, while men need 38 grams.

Stay Hydrated

Water is essential for digestion and stool formation. Dehydration can lead to constipation, so aim to drink at least eight glasses of water daily (more if you're physically active). If you're experiencing chronic diarrhea, you may need to replace both fluids and electrolytes by drinking an oral rehydration drink like Pedialyte.

Eat More Fermented Foods

Probiotic-rich foods like yogurt, kefir, sauerkraut, and kimchi support a healthy gut microbiome, which plays a key role in digestion and bowel regularity.

Manage Stress

Chronic stress can slow digestion and contribute to issues like constipation. To manage your stress, try techniques like deep breathing, yoga, or meditation.

Exercise Regularly

Physical activity stimulates the intestines, helping food move more efficiently through your digestive system. Even light exercise like walking or yoga can improve bowel regularity.

Identify Food Intolerances

Certain foods can trigger digestive distress. Keeping a food diary or trying an elimination diet under the supervision of a registered dietitian can help pinpoint problem foods like dairy, gluten, or FODMAPs.

When to See a Doctor

While occasional digestive problems are normal, some symptoms warrant medical attention:

  • Blood in your poop, or black, tarry poop.
  • Persistent diarrhea or constipation lasting more than a few weeks.
  • Unexplained weight loss.
  • Severe abdominal pain or cramping.
  • Changes in stool that last more than a few weeks.
  • Symptoms of malabsorption, such as greasy, foul-smelling poop.

If you experience any of these symptoms, consult a healthcare professional to rule out serious conditions like infections, inflammatory bowel disease (IBD), or colorectal cancer.

Final Thoughts

Your poop is a valuable clue to your overall health. By paying attention to its frequency, color, and consistency, you can identify potential digestive problems and take proactive steps to support your gut health. A diet rich in fiber, proper hydration, stress management, and regular exercise can go a long way in keeping your digestive system running smoothly. If you're still constipated, check out our constipation care plan.

If you're struggling with digestion and have ruled out causes like IBD and colorectal cancer, a registered dietitian can help you get your digestion back on track. Click here to get in touch with us at Blue Tree Nutrition and book an appointment with a registered dietitian.

Our gut microbiome (the community of trillions of microbes that live in our gut) plays a key role in maintaining metabolic and immune health. Gut dysbiosis occurs when the composition and diversity of our gut microbiome shift. This could include overgrowth of harmful bacteria or a decrease in beneficial bacteria. Gut dysbiosis has been linked to a wide range of negative health outcomes, including increased levels of inflammation and changes in metabolism.

Many people switch to non-nutritive sweeteners like sucralose, aspartame, and stevia for health reasons, and for decades, we've believed that they pass through our bodies without affecting us. But emerging research shows that these compounds interact directly with our gut microbiome and may have potential negative effects on our health. 

This article will review what we currently know about the relationship between non-nutritive sweeteners (including artificial sweeteners and calorie-free natural sweeteners) and the gut microbiome, plus practical advice for navigating sweeteners.

Sucralose

Sucralose (Splenda) is an artificial sweetener commonly used in baked goods, gums, and sugar-free beverages and is approximately 600 times sweeter than sucrose (table sugar). However, recent research has linked it to adverse health effects such as systemic inflammation, metabolic disease, and gut dysbiosis. For example, a 2022 study found that sucralose consumption increased harmful bacteria and reduced beneficial bacteria, which was associated with changes in insulin and glucose levels.

Additionally, a 2025 randomized controlled trial examining the effects of replacing added sugars with sucralose found that people with type 2 diabetes who consumed sucralose experienced reductions in both alpha diversity (the number and types of species present in a single person) and beta diversity (differences in microbial composition between people). Interestingly, the people with overweight and obesity without type 2 diabetes did not experience the same changes.

Overall, animal studies and limited human studies suggest that sucralose may trigger intestinal inflammation, likely through its effects on the gut microbiome. However, since most of the evidence we have comes from test tube or animal studies, these results should be interpreted cautiously.

Aspartame

Aspartame is another commonly used artificial sweetener that is about 200 times as sweet as sucrose. While it does contain some calories, because you don't need much of it to reach the same sweetness levels as sucrose, these calories are negligible.

Like sucralose, most of the research into the gut effects of aspartame has been done in animals. However, we do have some very small human studies. A 2022 randomized controlled trial (RCT) involving 20 healthy adults found that participants taking aspartame showed changes in both probiotic (beneficial) and pathogenic (harmful) bacteria, but the changes were specific to each individual. 

Why the differences? It's likely due to the "responder vs. non-responder" phenomenon. We all have differences in our "baseline" microbiome. While certain bacterial species are common in healthy populations, our microbiome is as unique as a fingerprint. Whether an artificial sweetener has positive or negative effects on our microbiome may depend on which species are already present in our gut, as well as on our habitual diet. This difference in responses makes it very challenging to draw firm conclusions about whether artificial sweeteners are harmful.

Stevia

Many people choose stevia because it's a "natural" zero-calorie sweetener. Studies have shown mixed results regarding the effects of stevia on the gut microbiome. For example, while some in vitro (test tube) and in vivo (animal) studies have reported potentially harmful effects of stevia on the gut microbiome, others have found no impact, and some even reported beneficial effects through inhibition of inflammatory pathways.

Additionally, a 2024 human study found that stevia had no significant effect on the gut microbiome. This highlights the importance of not forming conclusions based solely on test tube and animal studies. Overall, it appears that stevia is a potentially less-harmful alternative to artificial sweeteners like sucralose and aspartame.

Practical Advice for Navigating Sweeteners

Since the research on artificial sweeteners is still evolving, the decision to include or avoid them comes down to personal preference. Here are some tips for including them in your diet in moderation:

  • Try gradually reducing the amount you use: If you typically use two packets of sweetener in your coffee or tea, try gradually reducing to one packet. Our taste buds are highly adaptable, and you may find that one packet is sweet enough once you get used to it.
  • Check your labels: Low- or no-calorie sweeteners (such as sucralose, aspartame, and sugar alcohols like erythritol) are often hidden in low-sugar foods like protein bars, yogurt, and diet sodas. Awareness is the first step to reducing your intake.
  • Rotate your sources: If you do use artificial sweeteners, try switching up the types you use. Since different sweeteners may affect your gut microbiome in different ways, this may reduce the concentrated impact on your gut.
  • Switch to stevia: While animal and test-tube studies show mixed findings, human research indicates that stevia has a limited effect on the gut microbiome, making it a better choice for people seeking to support their gut health.

Another way to support your gut if you regularly use artificial sweeteners is to rebuild gut diversity with fiber and fermented foods, while focusing on whole-food sweeteners.

  • High fiber prebiotic foods (like legumes, whole grains, garlic, onions, asparagus, and under-ripe bananas) act as "fuel" for your healthy gut microbes. Aim to include a variety of these foods in your diet to support the microbes already in your gut.
  • Add fermented foods, like unpasteurized sauerkraut and kimchi, kefir, or kombucha, to your diet. Some fermented foods contain live, beneficial bacterial cultures, while others are rich in "postbiotics" (beneficial compounds like short-chain fatty acids, which are produced when bacteria break down prebiotics).
  • Try using whole-food sweeteners instead of artificial ones. For example, sweeten plain yogurt with vanilla extract and berries or add dates to smoothies or homemade energy bites.

Final Thoughts

Emerging research suggests that certain low- or no-calorie sweeteners, including sucralose and aspartame, may affect the gut microbiome, whereas stevia appears to have a less negative effect. While individual responses can vary with a person's unique baseline microbiome, certain artificial sweeteners may increase inflammation or reduce gut microbiome diversity.

If you need personalized support navigating sweeteners or supporting your gut health, Blue Tree Nutrition can help. Click here to get in touch!

 

 

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Hello, I am

Valerie

My name is Valerie Polley. I am a Indianapolis-based registered dietitian and owner of Blue Tree Nutrition. I consult with clients both local and far away.
I have a bachelor’s degree in nutrition from Purdue University and I have been practicing for 20 years.
I thoroughly enjoy helping clients through their gut health journey. I see a range of GI issues including, but not limited to celiac disease, IBS and SIBO. I also specialize in the FODMAP elimination diet.