Probiotics for Bloating: Do They Help? What the Evidence Says

Probiotics are one of the first things many people consider when bloating won't go away. Shelves and search results are full of products marketed for gut health and digestive comfort. The research is more limited than that marketing suggests. Most studies look at specific conditions such as irritable bowel syndrome (IBS), results depend on the exact microorganism used, and probiotics can themselves cause gas in some people. This guide explains what the evidence does and doesn't show, and what to check before buying a probiotic for bloating.

The Short Answer

• The evidence doesn't establish that probiotics relieve bloating in general. Most research involves IBS, and even there the National Center for Complementary and Integrative Health (opens in a new tab) (NCCIH) notes that no definite conclusions could be drawn.
• Major gastroenterology guidance is cautious. In 2020, the American Gastroenterological Association (AGA) recommended using probiotics for IBS only in the context of a clinical trial, citing gaps in the evidence.
• Probiotics aren't interchangeable. Effects can differ by species and strain, so research on one product doesn't automatically apply to another.
• They can cause gas. The NIH Office of Dietary Supplements notes that probiotics may cause gas in healthy people.
• Check with a healthcare provider first, especially if you have health problems, a weakened immune system or persistent symptoms.

What Are Probiotics?

According to NCCIH, probiotics are "live microorganisms that are intended to have health benefits when consumed or applied to the body." The NIH Office of Dietary Supplements (opens in a new tab) (ODS) notes that they include bacteria and yeasts.

"Probiotic" describes a broad category, not a single ingredient. Products are identified by:

• genus, such as Lactobacillus or Bifidobacterium
• species, the next level of classification
• strain, a specific variety within a species

This matters because NCCIH notes that different types of probiotics may have different effects. If one kind of Lactobacillus helps with a particular problem, that doesn't necessarily mean another kind of Lactobacillus, or a Bifidobacterium, would do the same.

Why Does Bloating Happen?

The National Institute of Diabetes and Digestive and Kidney Diseases (opens in a new tab) (NIDDK) describes bloating as "a feeling of swelling or fullness in the abdomen." It notes that having gas and some gas symptoms is normal. People may have problems because they have extra gas in the digestive tract, or because they feel gas symptoms more strongly even when the amount of gas is normal.

Common contributors include swallowed air and gas produced by bacteria (opens in a new tab) in the large intestine as they break down carbohydrates that weren't fully digested earlier. Certain foods, eating habits and health conditions such as IBS, lactose intolerance and constipation can also play a role.

Because bloating has so many possible causes, it doesn't by itself point to a problem with gut bacteria, or to something a probiotic would fix. For the most common everyday contributors, see our guides to bloating after eating and foods that cause bloating.

Do Probiotics Help With Bloating?

Here's what the sources we reviewed say:

NIDDK's IBS treatment guidance (opens in a new tab) similarly notes that researchers are still studying the use of probiotics to treat IBS.

Can Probiotics Cause Bloating or Gas?

They can. According to ODS, "in healthy people, probiotics may cause gas," although they rarely cause infections or other health problems in that group.

That's worth keeping in mind if you're trying a probiotic specifically because of bloating. If symptoms appear or get worse after starting one, that's useful information to share with a healthcare provider.

Probiotics for Other Digestive Problems

Probiotics have been studied for other digestive problems, and the evidence differs from one problem to the next:

• Diarrhea associated with antibiotics. ODS notes that some probiotic strains might help reduce the risk of antibiotic-associated diarrhea in children and adults. NCCIH notes that probiotics may be helpful for antibiotic-associated diarrhea in young and middle-aged people, while a benefit wasn't shown in elderly people, and that few studies included older people.
• Constipation. NCCIH describes the evidence for probiotics and constipation as mixed, and the results it summarizes differ between older adults and children. Constipation is one possible cause of bloating, and our guide to constipation and bloating covers the everyday steps NIDDK recommends.

These findings are specific to those situations. They don't show that probiotics help with bloating. If you're taking antibiotics, ask your healthcare provider whether a probiotic makes sense for you and when to take it.

Probiotic Foods vs. Probiotic Supplements

ODS lists fermented foods such as yogurt, cheese, kimchi, sauerkraut, miso and kombucha, and notes that manufacturers may add probiotics to some other foods. It also cautions that not all of these foods necessarily contain probiotics with proven health benefits.

Supplements name specific microorganisms on the label, but that doesn't guarantee what's inside. NCCIH reports that some probiotic products have been found to contain microorganisms other than those listed on the label.

There's also a regulatory difference to understand. According to NCCIH, the FDA may regulate a probiotic as a dietary supplement, a food ingredient or a drug, depending on its intended use. Many probiotics are sold as dietary supplements, which don't require FDA approval before they're marketed. ODS adds that there are no official recommendations covering the use of probiotics by healthy people.

How to Read a Probiotic Supplement Label

ODS explains what probiotic labels typically include. These checks can help you compare products and spot missing information:

For a broader framework covering any digestive supplement, including herbal formulas and enzyme blends, see Digestive Health Supplements: What to Look for Before You Buy.

Who Should Be Careful With Probiotics?

NCCIH notes that probiotics have an extensive history of apparently safe use, particularly in healthy people. However, few studies have examined their safety in detail. According to NCCIH and ODS:

• People with serious illnesses or weakened immune systems face a greater risk of harmful effects, including bacterial infections.
• Premature infants: serious and sometimes fatal infections have been reported in premature infants who were given probiotics.
• People taking antibiotics should talk with a healthcare provider about whether and when to take a probiotic.

NCCIH advises consulting your healthcare provider before taking a probiotic dietary supplement, especially if you have health problems. NIDDK's guidance on gas (opens in a new tab) also advises talking with your doctor before using supplements, probiotics or other complementary approaches.

Probiotics Aren't the Only Option People Consider

Probiotics are often weighed against other approaches to bloating, and they work in different ways. If you're deciding between a probiotic and a digestive enzyme, our guide to digestive enzymes vs. probiotics for bloating compares the two. If you're adding fiber, our guide to fiber and bloating explains why increasing it gradually matters.

When to Talk to a Healthcare Professional

According to NIDDK (opens in a new tab), talk with your doctor if gas symptoms bother you, change suddenly, or come with other symptoms such as abdominal pain, constipation, diarrhea or weight loss.

It's also worth talking with a healthcare professional before starting a probiotic if you:

• have a health condition or a weakened immune system
• are taking antibiotics or other medicines
• have bloating that is frequent, persistent or getting worse

Bloating that keeps coming back can have causes, such as lactose intolerance or IBS, that are better identified with a professional evaluation than with trial and error.

The Bottom Line

Probiotics are widely marketed for bloating, but the evidence doesn't establish that they relieve it. Most research involves IBS, where results are mixed, and the AGA recommends probiotics for IBS only in clinical trials. Effects depend on the specific strain, products aren't interchangeable, labels haven't always been accurate, and probiotics can cause gas in some people.

If you're considering a probiotic, check the label for the genus, species, strain and CFU count through the expiration date, and look for evidence on that specific strain. Talk with a healthcare professional first, especially if you have health problems or bloating that is frequent or getting worse. For everyday steps that may help, see our guide to practical ways to support digestion and manage occasional bloating.