Gas Happens: Understanding Causes and How to Reduce Excessive Bloating
Colloquially, to gas someone up is to inflate their ego via compliments, praise, or actions.
Unfortunately, from a physiological perspective, getting “gassed up” may be far less pleasant.
While the actual prevalence of intestinal gas is hard to quantify, its impact on quality of life is very real. In fact, gas and bloating are among the most common reasons individuals seek medical care for digestive concerns.
In today’s article, we’ll walk through some of the common—and sometimes more complex—causes of excessive gas production and offer practical strategies to help you fight back against frivolous flatulence.
Let’s get right into it.
Causes of Excessive Gas
There are a few different ways to think about intestinal gas.
From a broad perspective, gas can either be introduced from external sources or produced within the digestive tract.
External Sources: Swallowed Air (Aerophagia)
Swallowing air—scientifically referred to as aerophagia—is one of the most common contributors to excess gas.
This can happen more often than you might think, especially when:
- Eating quickly or while distracted
- Drinking carbonated beverages
- Using straws
- Chewing gum or sucking on hard candy
Simple changes can make a meaningful difference here. Eating smaller, more spread-out meals in a relaxed setting and slowing down while eating can help reduce the amount of air swallowed throughout the day.
Internal Sources: Digestion and the Gut Microbiome
But there’s more to the story.
- Carbohydrate intolerance (for example, lactose intolerance)
- Underlying gut conditions, such as IBS or imbalances in gut bacteria
For some individuals, identifying and removing a trigger—like lactose—can be relatively straightforward, especially with the availability of lactose-free alternatives.
For others, particularly those living with IBS, the situation is often more complex.
In IBS, gas production isn’t always the only issue. The body’s ability to move gas through the digestive tract and an individual’s sensitivity to that gas may also be altered. This can lead to increased discomfort, even when gas levels are similar to those without IBS.
This is where approaches like the Low FODMAP diet may be introduced under professional guidance to help identify specific carbohydrate triggers.
Dietary Guidance for Gas Reduction
There is a wide range of foods that—especially in moderate to large amounts—may increase gas production in some individuals.
Common examples include:
- Legumes
- Onions and garlic
- Dairy products (for those with lactose intolerance)
- Sugar alcohols (such as sorbitol, mannitol, and erythritol)
- Cruciferous vegetables like cabbage and cauliflower
That said, it’s important to approach this carefully.
Completely avoiding foods without proper guidance can lead to unnecessary restriction. If you suspect your diet and digestive symptoms are misaligned, working with a qualified healthcare professional—such as a registered dietitian—can help you pinpoint triggers without compromising overall nutrition.
What to Add Instead of Remove
While it’s easy to focus on what to cut out, it’s often more helpful to consider what to include.
Research published in the American Journal of Gastroenterology suggests that individuals with IBS may benefit from foods that are:
- Higher in soluble fiber
- Lower in highly fermentable carbohydrates
Some examples include:
- Ground flax, chia, or hemp seeds
- Eggplant
- Kiwi and oranges
- Carrots
- Tofu
- Strawberries and raspberries
- Oatmeal
- Quinoa
- Squash
These foods tend to be gentler on digestion for many individuals and can support overall gut health without contributing significantly to gas production.
Final Thoughts
There are many individual and environmental factors that can contribute to excessive gas production.
The strategies outlined here are practical, low-risk starting points—but they may not fully resolve symptoms, especially in more complex cases involving IBS or other gastrointestinal conditions.
Because of the wide range of potential underlying causes, seeking support from healthcare professionals—such as a gastroenterologist or registered dietitian—can provide more personalized and effective solutions.
At the end of the day, gas happens. But with the right approach, it doesn’t have to control your day.
- American College of Gastroenterology. (2021). ACG clinical guideline: Management of irritable bowel syndrome. The American Journal of Gastroenterology, 116(1), 17–44. https://doi.org/10.14309/ajg.0000000000001036
- Barrett, J. S., & Gibson, P. R. (2012). Clinical ramifications of malabsorption of fructose and other short-chain carbohydrates. Practical Gastroenterology, 36(10), 51–65.
- Ford, A. C., Lacy, B. E., & Talley, N. J. (2017). Irritable bowel syndrome. New England Journal of Medicine, 376(26), 2566–2578. https://doi.org/10.1056/NEJMra1607547
- Lacy, B. E., Mearin, F., Chang, L., Chey, W. D., Lembo, A. J., Simrén, M., & Spiller, R. (2016). Bowel disorders. Gastroenterology, 150(6), 1393–1407.e5. https://doi.org/10.1053/j.gastro.2016.02.031
- Staudacher, H. M., Irving, P. M., Lomer, M. C. E., & Whelan, K. (2014). Mechanisms and efficacy of dietary FODMAP restriction in IBS. Gut, 63(9), 1517–1527. https://doi.org/10.1136/gutjnl-2013-304909
- Suarez, F. L., Springfield, J., & Levitt, M. D. (1995). Identification of gases responsible for the odour of human flatus and evaluation of a device purported to reduce this odour. Gut, 36(5), 766–773. https://doi.org/10.1136/gut.36.5.766
Recipes
Products
Comments
Join The Conversation...