Several over-the-counter options can help with bloating, but the right one depends on what’s causing it. Bloating from gas, undigested food, constipation, and fluid retention each respond to different remedies. Here’s what actually works and when to use each one.
Simethicone for Trapped Gas
If your bloating feels like pressure from gas that won’t move, simethicone is the most straightforward fix. It works by breaking up gas bubbles in your digestive tract so they’re easier to pass. You’ll find it sold as Gas-X, Mylicon, and various store brands.
The standard adult dose is 40 to 125 mg taken four times a day, after meals and at bedtime, with a maximum of 500 mg in 24 hours. It’s available as regular tablets, chewable tablets, and liquid. Simethicone doesn’t get absorbed into your bloodstream, so side effects are rare. It won’t prevent gas from forming in the first place, though. It just helps you expel what’s already there.
Digestive Enzymes for Problem Foods
Sometimes bloating happens because your body can’t fully break down certain foods. Two enzyme supplements target the most common culprits.
Alpha-galactosidase (sold as Beano) breaks down a type of non-absorbable fiber found in beans, root vegetables, and some dairy products. These fibers pass undigested into your large intestine, where bacteria ferment them and produce gas. Taking a tablet right before eating, or with your first bite, gives the enzyme time to work before the food reaches your colon.
Lactase supplements (sold as Lactaid) do essentially the same thing for the milk sugar lactose. If dairy reliably makes you bloated, taking lactase with your first sip or bite of a dairy product can prevent the problem entirely. Neither of these enzymes helps with bloating from other causes, so they’re only worth trying if you can trace your symptoms to specific trigger foods.
Peppermint Oil for Crampy Bloating
Enteric-coated peppermint oil capsules are one of the better-studied natural options, particularly for bloating tied to irritable bowel syndrome. The active ingredient, menthol, relaxes the smooth muscle lining your gut by blocking calcium channels that trigger contractions. This eases the cramping and distension that make bloating painful rather than just uncomfortable.
Clinical trials have used doses ranging from 187 mg three times daily (taken 30 minutes before meals) to 225 mg twice daily, typically for four to eight weeks. The enteric coating matters. Without it, the peppermint oil dissolves in your stomach and can cause heartburn. Look specifically for capsules labeled “enteric-coated” and take them on an empty stomach before meals so they pass through to the intestines intact.
Probiotics for Recurring Bloating
If you’re bloated more days than not, a probiotic may help by shifting the balance of bacteria in your gut toward species that produce less gas. The catch is that strain matters enormously. Most generic probiotics on store shelves haven’t been tested for bloating specifically.
The strains with the strongest clinical backing for bloating relief are in the Bifidobacterium family. Bifidobacterium infantis 35624 (sold as Alflorex or Align in some markets), Bifidobacterium longum CECT 7347, and Bifidobacterium bifidum MIMBb75 have all shown broad symptom relief across IBS subtypes, improving bloating, pain, and stool consistency. Certain Lactobacillus strains, including Lacticaseibacillus rhamnosus IDCC 3201, have also reduced bloating in trials, particularly in people whose bloating comes alongside constipation.
Probiotics aren’t a quick fix. Most studies run four to eight weeks before measuring results, so give any probiotic at least a month before deciding it isn’t working. And check the label for the specific strain name and number, not just the species.
Magnesium for Constipation-Related Bloating
Bloating that comes with infrequent bowel movements or hard stools is often constipation bloating. The pressure of backed-up stool stretches the colon and traps gas behind it. In this case, getting things moving resolves the bloating too.
Magnesium citrate draws water into your intestines, softening stool and stimulating movement. It’s available as a liquid or tablets. For occasional constipation, the typical adult dose is 2 to 4 tablets at bedtime or a single dose of the liquid form. It usually works within 6 to 12 hours. This is a short-term solution. If you’re relying on it regularly, the underlying constipation needs its own investigation, whether that’s more fiber, more water, or a conversation with your doctor about motility.
A Low-FODMAP Diet as a Reset
When no single remedy seems to help, the bloating may come from fermentable carbohydrates in your everyday diet. FODMAPs are a group of short-chain carbohydrates found in foods like wheat, onions, garlic, apples, and certain dairy products. They ferment rapidly in the gut and draw in extra water, causing both gas and distension.
A low-FODMAP diet temporarily removes these foods for two to six weeks, then reintroduces them one category at a time to identify your personal triggers. About 75% of people with IBS see meaningful improvement during the elimination phase. This isn’t meant to be permanent. The reintroduction phase is the point, because it tells you which specific foods cause your bloating so you can eat freely otherwise. Working with a dietitian helps, since the elimination phase is restrictive enough to be nutritionally tricky on your own.
What About Activated Charcoal?
Activated charcoal tablets are widely marketed for gas and bloating, but the evidence is thin. While activated charcoal is highly effective for certain hospital uses like poisoning, results for everyday gas and bloating are conflicting. Some people swear by it, but clinical data hasn’t consistently shown it outperforms a placebo. It can also interfere with the absorption of medications you’re already taking, so if you’re on any prescriptions, it’s worth being cautious.
Matching the Remedy to the Cause
The most common mistake people make is grabbing whatever is on the pharmacy shelf without thinking about why they’re bloated. A quick way to narrow it down:
- Bloating after meals with visible distension and gas: simethicone for immediate relief, digestive enzymes if you can identify the trigger food
- Bloating with cramping or IBS symptoms: enteric-coated peppermint oil or a targeted probiotic strain
- Bloating with constipation: magnesium citrate short-term, fiber and fluids long-term
- Bloating that’s chronic and unpredictable: a low-FODMAP elimination diet to identify triggers
Bloating that gets progressively worse over weeks, comes with unintentional weight loss, fever, vomiting, blood in your stool, or persistent pain that doesn’t respond to any of these approaches is a different situation. Those patterns can signal conditions that need medical evaluation rather than over-the-counter management.