Passing gas between 14 and 23 times a day is completely normal. If you’re noticing it more than that, or it feels like a recent change, the cause almost always traces back to what you’re eating, how you’re eating, or what’s happening in your gut. The good news is that most causes are fixable without medical help.
What Counts as Too Much Gas
Most people assume they fart more than average, but the bar is higher than you’d think. Healthy adults pass gas up to 23 times a day, and anything in the 14 to 23 range is perfectly typical. The gas itself is a byproduct of digestion: bacteria in your large intestine break down food that your small intestine couldn’t fully absorb, and that fermentation process produces hydrogen, methane, and sometimes sulfur gases. You also swallow small amounts of air every time you eat or drink, and that air has to go somewhere.
If you’re consistently above 23 episodes a day, or if the volume, smell, or discomfort has changed noticeably, something specific is likely driving it.
Foods That Produce the Most Gas
The biggest dietary culprits are a group of short-chain carbohydrates that your small intestine doesn’t absorb well. When these reach your large intestine intact, gut bacteria ferment them rapidly, producing gas as a direct byproduct. The main categories:
- Beans, lentils, onions, garlic, and wheat contain chains of sugars called fructans and galacto-oligosaccharides. These are some of the most potent gas producers in a typical diet.
- Dairy products like milk, soft cheeses, and yogurt contain lactose. If your body doesn’t produce enough of the enzyme that breaks lactose down, the undigested sugar ferments in your colon. Symptoms typically hit within a few hours of eating dairy.
- Honey, apples, and foods with high-fructose corn syrup are high in fructose, which some people absorb poorly.
- Sugar-free gum, mints, and certain fruits contain sugar alcohols like sorbitol and mannitol, which are notorious for causing bloating and gas even in small amounts.
You don’t need to avoid all of these permanently. The practical move is to cut back on one category at a time for a few days and see if your symptoms change. A food diary makes this much easier to track. Many people discover that one or two specific triggers are responsible for most of their gas.
Habits That Make You Swallow Air
Not all gas comes from fermentation. A surprising amount enters your body as swallowed air, which either comes back up as a burp or travels through your digestive tract and exits as flatulence. Common habits that increase air swallowing:
- Eating too fast or talking while you eat
- Chewing gum or sucking on hard candy
- Drinking through a straw
- Carbonated drinks like soda, sparkling water, and beer
- Smoking
These are easy to test. Try eating more slowly, chewing each bite fully before taking the next one, and switching from carbonated to still drinks for a week. If swallowed air is a major contributor, you’ll notice a difference quickly, particularly in how bloated you feel after meals.
Your Gut Bacteria Play a Role
The composition of your gut microbiome directly affects how much gas you produce and how bad it smells. Research published in the journal Gut found that the volume of gas a person produces correlates with levels of specific bacteria, particularly one called Bilophila wadsworthia. This bacterium breaks down sulfur-containing amino acids from protein-rich foods and produces hydrogen sulfide, the compound responsible for that rotten-egg smell.
In practical terms, this means two people can eat the same meal and produce very different amounts of gas. Your unique bacterial mix is shaped by your long-term diet, antibiotic history, stress levels, and other factors. Diets high in animal protein and fat tend to encourage more sulfur-producing bacteria, while plant-heavy diets shift the balance toward bacteria that produce less odorous gases.
Probiotics show some promise here. A Bifidobacterium and Lactobacillus mixture reduced flatulence by 50 percent in more than half of participants after four weeks in one trial. That’s not a guaranteed fix, but it suggests that shifting your gut bacteria can make a measurable difference for some people.
Medical Conditions Worth Knowing About
Persistent, excessive gas that doesn’t improve with dietary changes can signal an underlying condition. The two most common are food intolerances and bacterial overgrowth.
Lactose Intolerance
About two-thirds of the global population loses the ability to digest lactose efficiently after childhood. If gas, bloating, or diarrhea reliably show up within a few hours of consuming dairy, this is worth investigating. A hydrogen breath test from your doctor can confirm it, or you can simply eliminate dairy for two weeks and see what happens.
Small Intestinal Bacterial Overgrowth (SIBO)
Normally, most of your gut bacteria live in your large intestine. With SIBO, bacteria colonize the small intestine in unusually high numbers and start fermenting carbohydrates before your body has a chance to absorb them. The result is excess gas, bloating, and sometimes oily or especially foul-smelling stool. SIBO is diagnosed with a breath test and is treatable.
IBS and Other Functional Disorders
Irritable bowel syndrome doesn’t necessarily mean you produce more gas than average, but it can make your gut more sensitive to normal amounts of gas. People with IBS often experience pain and bloating at gas volumes that wouldn’t bother someone without the condition. A low-FODMAP diet, developed by researchers at Monash University, is one of the most effective dietary approaches for managing IBS-related gas and bloating.
What Actually Helps Reduce Gas
Start with the basics: slow down when you eat, identify your worst food triggers, and cut back on carbonated drinks and sugar-free sweeteners. These changes alone resolve the problem for many people.
If you eat a lot of beans and legumes and don’t want to give them up, an enzyme supplement containing alpha-galactosidase (sold as Beano and similar brands) breaks down the specific sugars that cause gas from those foods. Clinical trials show significant symptom improvement when it’s taken just before a meal.
Simethicone, the active ingredient in Gas-X, is widely recommended but hasn’t shown clear benefits for everyday flatulence in studies. It works by breaking up gas bubbles, which may help with the sensation of bloating, but it doesn’t reduce the amount of gas your body produces.
For smell specifically, bismuth subsalicylate (Pepto-Bismol) binds over 95 percent of sulfur gases in the gut. Activated charcoal taken orally hasn’t shown consistent results, but charcoal-lined underwear pads absorb 55 to 77 percent of sulfur gases, and charcoal briefs absorb nearly all of them. These are real products, backed by actual testing, for people whose primary concern is odor in social situations.
Signs Something Bigger Is Going On
Gas by itself, even a lot of it, is rarely a sign of something serious. But you should pay attention if your gas comes with abdominal pain, unexplained weight loss, persistent diarrhea or constipation, or a sudden change in your symptoms after years of normalcy. These combinations can point to conditions like celiac disease, inflammatory bowel disease, or other digestive disorders that benefit from early diagnosis.