Passing gas between 14 and 23 times a day is completely normal, but if you’re dealing with more than that, or it’s uncomfortable and disruptive, simple changes to how you eat and what you eat can make a real difference. Most excess gas comes from two sources: air you swallow and food that ferments in your large intestine. Targeting both gives you the best results.
Why Your Body Makes Gas
Gas in your digestive tract has two origins. The first is swallowed air, which accounts for most belching. Every time you eat, drink, or swallow saliva, a small amount of air travels down with it. Certain habits dramatically increase that amount.
The second source is bacterial fermentation in your colon. Your large intestine is home to trillions of bacteria that feed on carbohydrates your small intestine couldn’t fully break down. As those bacteria digest these leftovers, they produce hydrogen, methane, and carbon dioxide. The more undigested material that reaches your colon, the more gas those bacteria generate. This is the main driver of flatulence, and it’s directly tied to what you eat.
Stop Swallowing Extra Air
A surprising amount of gas never comes from digestion at all. You can cut down on swallowed air by changing a few everyday habits:
- Eat more slowly. Rushing through meals causes you to gulp air with every bite. Poorly chewed food also reaches the stomach in large, disorganized pieces with pockets of air trapped between them, which contributes to flatulence, heartburn, and bloating further down the line.
- Don’t talk while chewing. Opening your mouth mid-bite lets air in with each word.
- Skip straws and carbonated drinks. Straws force you to suck air into your stomach alongside your beverage. Carbonated drinks deliver carbon dioxide directly.
- Cut back on gum and hard candy. Both keep you swallowing repeatedly, and each swallow pulls in a small amount of air.
Chewing your food thoroughly does double duty here. When you chew well, food breaks into smaller particles with more surface area for digestive enzymes to work on. That means more gets absorbed in the small intestine, leaving less for bacteria to ferment in the colon. Slower, more deliberate chewing also reduces the volume of air that hitches a ride to your stomach.
Foods That Cause the Most Gas
Certain carbohydrates are poorly absorbed in the small intestine and pass largely intact into the colon, where bacteria ferment them rapidly. These are sometimes grouped under the term FODMAPs (fermentable oligosaccharides, disaccharides, monosaccharides, and polyols). MRI studies have confirmed that these short-chain carbohydrates increase water volume in the small intestine and boost gas production in the colon. For people with sensitive guts, the effect is even more pronounced.
The most common culprits include:
- Beans and lentils, which are rich in oligosaccharides your body can’t break down on its own
- Cruciferous vegetables like broccoli, cauliflower, cabbage, and Brussels sprouts
- Onions and garlic
- Dairy products, especially if you have any degree of lactose intolerance
- Sugar alcohols found in sugar-free gum, candy, and some protein bars (look for ingredients ending in “-ol,” like sorbitol or xylitol)
- Wheat and rye in larger portions
You don’t necessarily need to eliminate these foods permanently. Many of them are nutritious. The goal is to identify which ones give you the most trouble and adjust portions accordingly. Keeping a simple food diary for a week or two, noting what you ate and when gas was worst, often reveals patterns you wouldn’t notice otherwise.
How to Add Fiber Without the Bloat
Fiber is one of the best things you can eat for digestive health, but adding too much too quickly is one of the fastest ways to become gassy. Your gut bacteria need time to adjust to a higher fiber load. If you’re increasing your intake, do it gradually over several weeks rather than overhauling your diet overnight. Adding one new high-fiber food every few days gives your microbiome a chance to adapt. Drinking plenty of water alongside the extra fiber also helps it move through your system more smoothly, reducing the fermentation that creates gas.
Over-the-Counter Options That Help
Two types of products are widely available and work through completely different mechanisms.
Digestive Enzymes for Bean and Vegetable Gas
Products containing alpha-galactosidase (sold under brand names like Beano) supply an enzyme your body doesn’t naturally produce. This enzyme breaks down the specific oligosaccharides found in beans, lentils, and certain vegetables before they reach your colon. If bacteria never get to ferment those carbohydrates, the gas is never produced in the first place. The key is timing: you need to take these with your first bite of the problem food, not after symptoms start.
Gas Relief Products for Existing Discomfort
Simethicone (found in Gas-X, Mylanta Gas, and similar products) works differently. It doesn’t prevent gas from forming. Instead, it’s a surfactant that reduces the surface tension of gas bubbles already in your digestive tract, causing small bubbles to merge into larger ones that are easier to pass. It’s most useful when you’re already feeling bloated and uncomfortable, rather than as a preventive measure.
What About Probiotics?
Probiotic supplements are heavily marketed for digestive health, but the evidence for gas reduction specifically is weak. A systematic review of clinical trials found that probiotics tested so far do not reliably reduce flatulence in people with irritable bowel syndrome. Some combination probiotics containing Bifidobacterium infantis showed modest benefits for bloating and abdominal pain, but single-strain products didn’t move the needle on gas symptoms. If you want to try a probiotic, it’s reasonable to experiment for a few weeks, but don’t expect it to be a primary solution for gas.
Daily Habits That Make a Difference
Beyond specific foods and supplements, a few broader habits tend to reduce gas over time. Physical activity helps gas move through the intestines more quickly. Even a 10 to 15 minute walk after a meal can speed transit and reduce that post-meal bloated feeling. Eating smaller, more frequent meals rather than two or three large ones also gives your small intestine a better chance of absorbing carbohydrates before they reach the colon.
Smoking is another overlooked contributor. Each inhale pulls air into the esophagus, and frequent swallowing during smoking compounds the effect. Quitting, or at least reducing how much you smoke, cuts down on one steady source of swallowed air.
When Gas Signals Something Else
A noticeable increase in gas by itself is rarely serious. But if it comes alongside abdominal pain, unexplained weight loss, fever, bloody stools, or persistent diarrhea, those symptoms together can point to conditions like celiac disease, Crohn’s disease, or ulcerative colitis. A sudden, lasting change in your gas patterns, especially if paired with any of those red flags, is worth bringing up with a doctor.