Several over-the-counter options can reduce excessive gas, depending on what’s causing it. The most effective approach is matching the remedy to the trigger: enzyme supplements for hard-to-digest foods, simethicone for trapped gas bubbles, and dietary changes for ongoing problems. Most people pass gas 14 to 23 times a day, so “excessive” usually means noticeably more than your own baseline, or gas that comes with pain, bloating, or social discomfort.
Enzyme Supplements for Food-Related Gas
If certain foods reliably give you gas, an enzyme supplement taken at the right moment can prevent the problem before it starts. The two most common options target different triggers.
Alpha-galactosidase (sold as Beano) breaks down complex carbohydrates called galacto-oligosaccharides, the compounds in beans, lentils, broccoli, cauliflower, and Brussels sprouts that your body can’t digest on its own. When these carbohydrates reach your colon intact, bacteria ferment them and produce gas. The enzyme works best when taken with the first bite of a meal containing those foods. Taking it afterward is less effective because the food has already moved past the point where the enzyme can act on it.
Lactase supplements handle dairy-related gas. If your body doesn’t produce enough lactase naturally, the lactose in milk, cheese, and ice cream ferments in your colon instead of being absorbed in your small intestine. Over-the-counter lactase products range from about 3,000 to 9,000 FCC units per dose. A glass of milk typically needs around 3,000 units, while a richer dairy meal may need the higher-strength version. You take it just before or with the first bite of dairy.
Simethicone for Trapped Gas and Pressure
Simethicone (the active ingredient in Gas-X and Phazyme) works differently from enzymes. It doesn’t prevent gas from forming. Instead, it breaks up small gas bubbles in your stomach and intestines into larger ones that are easier to pass. This makes it useful for that uncomfortable feeling of pressure or fullness after eating, even when the gas isn’t caused by a specific food intolerance. It’s generally safe for frequent use because it isn’t absorbed into your bloodstream. It just passes through your digestive tract.
Peppermint Oil for Cramping and Spasms
If your gas comes with cramping or a tight, spasmy feeling in your abdomen, enteric-coated peppermint oil capsules are worth trying. The menthol in peppermint oil relaxes the smooth muscle lining your digestive tract, which can ease the pain that trapped gas causes and help it move through more quickly. Most clinical studies have used 180 milligrams per capsule, taken three times a day. The enteric coating matters because it prevents the capsule from dissolving in your stomach, where peppermint oil can worsen heartburn. Instead, the capsule opens in your intestines, where the gas and cramping actually happen.
Ginger for Sluggish Digestion
Ginger speeds up the rate at which food leaves your stomach and moves through the rest of your digestive system. When food lingers too long in your gut, it ferments more, producing extra gas. A natural compound in ginger root called gingerol improves this motility, which can cut down on bloating and intestinal gas. Fresh ginger in food, ginger tea, or ginger capsules all deliver the active compound, though capsules provide a more consistent dose. Johns Hopkins Medicine notes that ginger’s ability to reduce fermentation and constipation makes it a practical option for gas that comes with a heavy, slow-moving feeling after meals.
Bismuth Subsalicylate for Odor
Gas volume is one problem. Smell is another. If your main concern is foul-smelling gas rather than the amount, bismuth subsalicylate (Pepto-Bismol) targets that specifically. The bismuth binds to hydrogen sulfide, the sulfur compound responsible for the rotten-egg smell of flatulence. A study published in Gastroenterology found that taking bismuth subsalicylate for three to seven days produced a greater than 95% reduction in hydrogen sulfide released from stool samples. That’s a dramatic drop in the compound most responsible for odor. Keep in mind that bismuth turns your tongue and stool black, which is harmless but can be startling if you’re not expecting it.
Probiotics: Modest but Real Benefits
Probiotics can help if your gas stems from an imbalance in gut bacteria, though results vary widely from person to person. A meta-analysis of 23 trials covering over 2,500 people with irritable bowel syndrome found that probiotics significantly improved bloating and flatulence compared to placebo. The effect was real but modest, with roughly one in seven people experiencing meaningful improvement. Strains studied include Lactobacillus plantarum, Bifidobacterium longum, and Lactobacillus rhamnosus, among many others.
The challenge with probiotics is that no single strain works for everyone, and supplement quality varies. If you want to try them, give a product at least four weeks before deciding whether it’s helping. Switching strains is reasonable if the first one doesn’t make a difference.
What About Activated Charcoal?
Activated charcoal is often marketed for gas and bloating, but the evidence is weak. Cleveland Clinic notes that while activated charcoal is proven effective for poisoning treatment in emergency rooms, results for everyday gas relief are conflicting. Regular use can cause constipation, reduce nutrient absorption, and lower the effectiveness of medications you may be taking. It also turns your stool black. For occasional use it’s generally safe, but it’s not the most reliable option compared to the alternatives above.
Dietary Changes That Reduce Gas Production
Supplements address the symptoms, but the most effective long-term strategy is identifying your triggers. Common gas-producing foods include beans, lentils, onions, garlic, wheat, carbonated drinks, and sugar alcohols like sorbitol and xylitol found in sugar-free gum and candy. Dairy is a major trigger for the roughly 65% of adults who have some degree of lactose malabsorption.
Eating habits matter too. Eating quickly, chewing gum, drinking through straws, and talking while eating all increase the amount of air you swallow. That swallowed air has to go somewhere, and it exits as belching or flatulence. Slowing down at meals and avoiding carbonated beverages can make a noticeable difference without any supplements at all.
If you’re increasing fiber in your diet for health reasons, do it gradually. A sudden jump in fiber intake is one of the most common causes of a sudden increase in gas. Your gut bacteria adjust over a few weeks, and the gas typically decreases as they do.
Signs That Gas Needs Medical Attention
Excessive gas by itself is almost never dangerous, but certain accompanying symptoms point to something that needs evaluation. Bloody stools, unexplained weight loss, persistent changes in bowel habits, ongoing nausea or vomiting, and prolonged abdominal pain all warrant a visit. The Mayo Clinic also recommends seeking care if gas is severe enough to interfere with your daily life, even without those red flags, because conditions like celiac disease, small intestinal bacterial overgrowth, and inflammatory bowel disease can all present with excessive gas as an early symptom.