Farting up to 23 times a day is completely normal. Most healthy adults pass gas between 14 and 23 times daily, often without even noticing. So if you feel like you’re farting a lot, there’s a good chance you’re still within the typical range. It only becomes a potential concern when you’re consistently exceeding that upper end or when excessive gas comes alongside other symptoms like pain, bloating, or changes in your stool.
What’s Actually in a Fart
More than 99% of intestinal gas is made up of five odorless gases: nitrogen, oxygen, carbon dioxide, hydrogen, and methane. Nitrogen makes up the largest share, which is why most farts don’t actually smell. The composition shifts as gas moves through your digestive tract. Stomach gas looks a lot like the air around you (mostly nitrogen and oxygen), while gas further down contains less oxygen and more methane.
The smell comes from trace amounts of sulfur-containing compounds, particularly hydrogen sulfide. Bacteria in your mouth and gut produce hydrogen sulfide when they break down proteins from both plant and animal sources. So a fart that clears the room usually means your gut bacteria are doing exactly what they’re supposed to do with protein-rich food.
Why You Might Be Gassier Than Usual
Two things drive gas production: swallowed air and bacterial fermentation of food in your gut. On the swallowed-air side, eating too fast, talking while eating, chewing gum, sucking on hard candy, using straws, drinking carbonated beverages, and smoking all increase how much air ends up in your digestive system. This air has to go somewhere, and what doesn’t come up as a burp travels down.
The bigger contributor for most people is diet. Your gut bacteria ferment certain carbohydrates that your small intestine can’t fully absorb, and gas is the byproduct. The foods most likely to cause significant gas include:
- Fruits high in fructose or sorbitol: apples, pears, mangoes, cherries, watermelon, peaches, plums, and dried fruit
- Vegetables rich in fructans: garlic, onion, leek, artichoke, and spring onion
- Dairy products: milk, soft cheeses, and yogurt (due to lactose)
- Nuts: cashews and pistachios in particular
- Sweeteners: honey, high fructose corn syrup, and sugar alcohols like sorbitol and xylitol found in sugar-free candy and gum
- Sauces and condiments: many contain hidden garlic and onion
These foods aren’t unhealthy. In fact, many of them are excellent for you. But they do produce more gas during digestion, and eating a lot of them in combination can make a noticeable difference.
Medical Conditions That Increase Gas
When gas is persistent, uncomfortable, or paired with other digestive symptoms, a few conditions could be involved. Lactose intolerance is one of the most common culprits. If your body doesn’t produce enough of the enzyme that breaks down the sugar in dairy, that sugar ferments in your colon and produces excess gas and bloating. Gluten intolerance and celiac disease can cause the same pattern with wheat and other grains.
Irritable bowel syndrome (IBS) frequently involves increased gas, cramping, and unpredictable bowel habits. The gas itself isn’t always more voluminous, but the gut can be more sensitive to normal amounts of distension, making it feel worse. Small intestinal bacterial overgrowth, where bacteria that normally live in the large intestine colonize the small intestine instead, causes excess gas along with diarrhea and sometimes weight loss. Gastroparesis, a condition where the stomach empties too slowly, can also trap gas and create discomfort.
Smelly Gas vs. Frequent Gas
Frequency and odor are two separate issues with different causes. Frequent but odorless gas usually points to swallowed air or fermentation of carbohydrates. Infrequent but foul-smelling gas is more about sulfur, which comes from protein digestion. Foods like eggs, meat, broccoli, cauliflower, and cabbage are all high in sulfur-containing compounds.
If your gas has recently become much more foul-smelling without a dietary change, that can signal a shift in your gut bacteria or a malabsorption issue where food isn’t being broken down properly higher in the digestive tract, leaving more for bacteria to ferment lower down.
Simple Ways to Reduce Gas
The most effective starting point is paying attention to which foods trigger your gas and adjusting portions accordingly. You don’t necessarily need to eliminate high-gas foods entirely. Sometimes just reducing how many you eat in a single meal makes a difference. Eating more slowly, putting your fork down between bites, and avoiding conversation while chewing can cut down on swallowed air significantly.
Cutting back on carbonated drinks, chewing gum, and straws removes other major sources of swallowed air. If beans and certain vegetables are your main triggers, over-the-counter enzyme supplements (sold as Beano or Gas-X Prevention) can help. These contain an enzyme that breaks down the complex sugars in those foods before your gut bacteria get to them. You take them at the start of a meal, not after symptoms appear.
For people with lactose intolerance, lactase enzyme tablets taken before dairy work on the same principle. If you suspect a broader pattern of food sensitivities, a low-FODMAP diet, which temporarily removes the most fermentable carbohydrates and reintroduces them one category at a time, can help you identify your specific triggers.
Signs That Gas May Be Part of Something Bigger
Excessive gas on its own is rarely a sign of anything serious. But when it shows up alongside other symptoms, it’s worth getting evaluated. Unintentional weight loss of 10 pounds or more over three months without an obvious explanation is a red flag. Blood in your stool, whether bright red on the surface or dark and tar-like, always warrants investigation. Intense abdominal tenderness, pain that wakes you up at night, or persistent fever alongside digestive symptoms all suggest something beyond normal gas production.
A sudden change in bowel habits in anyone over 50, even without dramatic symptoms, is also worth bringing up with a doctor. For most people, though, farting a lot simply means your gut bacteria are well-fed and active. It’s one of the most reliable signs of a functioning digestive system.