Have you ever stepped on the scale and noticed an unexplained increase in weight? You haven’t changed your diet or workout routine, yet the numbers keep creeping up. If you’ve been feeling bloated, sluggish, and backed up, you might be wondering: can constipation make you gain weight? Let’s break down the science, explore real research, and uncover whether constipation has anything to do with your weight gain.
Understanding Constipation and Its Causes
Constipation occurs when bowel movements become infrequent or difficult to pass. It’s typically defined as having fewer than three bowel movements per week. But what causes constipation in the first place?
- Low fiber intake – Fiber adds bulk to stools and helps them pass smoothly.
- Dehydration – Not drinking enough water makes stools hard and dry.
- Lack of physical activity – Movement stimulates digestion.
- Medications – Certain painkillers, antidepressants, and iron supplements can slow down digestion.
- Stress and anxiety – Your gut and brain are connected, and stress can affect bowel movements.
- Ignoring the urge – Holding in a bowel movement can lead to chronic constipation.
Now, let’s tackle the big question: can constipation make you gain weight?

The Link Between Constipation and Weight Gain
While constipation itself doesn’t directly cause fat gain, it can lead to temporary weight fluctuations. Here’s how:
1. Retention of Waste Material
Your digestive system is constantly processing food, absorbing nutrients, and eliminating waste. When you’re constipated, stool remains in the colon longer than usual. Since the human body can hold up to 2-4 pounds of stool at any given time, prolonged constipation can lead to a slight increase in body weight. But this is not actual fat gain—just extra waste buildup.
2. Water Retention and Bloating
Constipation can cause bloating and water retention, making you feel and look heavier. Your body holds onto extra water in an attempt to soften the stool, leading to a temporary spike in weight.
3. Slowed Metabolism
A sluggish digestive system can slow down your metabolism. Some studies suggest that prolonged constipation may alter gut microbiota, impacting digestion and calorie absorption. While this doesn’t mean constipation causes long-term fat gain, it may contribute to digestive inefficiency.
4. Increased Appetite and Overeating
Feeling bloated and backed up can make you crave more food, thinking you need more fiber or hydration. If you respond by eating excessive high-calorie foods instead of fiber-rich foods, you may actually gain weight.
So, can constipation make you gain weight? Yes, but mostly due to retained waste and bloating rather than actual fat accumulation.
Research and Studies on Constipation and Weight Gain
A study published in the American Journal of Gastroenterology found that individuals with chronic constipation often report weight gain due to bloating and fluid retention. Another research paper in Gut Microbes highlights how an imbalance in gut bacteria due to constipation can influence digestion and fat storage.
In a 2019 study from Harvard Medical School, researchers found that people with sluggish digestion had a higher tendency to experience weight fluctuations. However, they emphasized that the weight gain from constipation is temporary and can be reversed by improving gut health.

How to Relieve Constipation and Maintain a Healthy Weight
Now that we’ve answered, “Can constipation make you gain weight?”, let’s explore some ways to keep your digestion on track and prevent unnecessary weight gain:
1. Increase Fiber Intake
Women should aim for 25 grams of fiber daily, while men should target 38 grams. Eat more fruits, vegetables, whole grains, nuts, and seeds.
2. Stay Hydrated
Drink at least 8-10 glasses of water daily. Herbal teas and coconut water can also help soften stools.
3. Exercise Regularly
Even 30 minutes of walking daily can help stimulate digestion. Yoga and stretching can aid bowel movement.
4. Manage Stress
Try deep breathing exercises, meditation, or journaling. Stress reduction plays a crucial role in healthy digestion.
5. Consider Probiotics
Fermented foods like yogurt, kefir, and sauerkraut promote a healthy gut microbiome. Probiotic supplements can also aid digestion.
6. Avoid Processed Foods and Excess Sugar
Processed foods often lack fiber and can worsen constipation. Reduce artificial sweeteners, as they can disrupt gut bacteria.
Can Constipation Make You Gain Weight?
If you’ve been asking yourself, “Can constipation make you gain weight?”, the answer is yes—but not in the way you might think. Constipation can cause temporary weight gain due to retained waste, bloating, and water retention. However, it does not lead to permanent fat gain unless unhealthy eating habits accompany it.
The good news? This weight gain is reversible! By making small changes—eating more fiber, drinking water, exercising, and managing stress—you can relieve constipation and maintain a healthy weight.
So, next time you feel bloated and heavy, don’t panic. Instead, focus on improving your gut health, and you’ll see the scale return to normal in no time. Have you ever noticed changes in your weight due to constipation? Let’s discuss in the comments!