Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Lactobacillus acidophilus is a probiotic bacterium that has been studied for its potential to alleviate gastrointestinal symptoms, including gas and bloating. Scientific evidence supporting its use is modest but present. Several small randomized controlled trials and meta-analyses have investigated the effects of L. acidophilus, alone or in combination with other probiotics, on symptoms of functional gastrointestinal disorders, such as irritable bowel syndrome (IBS), where gas and bloating are common complaints.

Some studies have shown that supplementation with L. acidophilus may help to reduce bloating and flatulence, potentially by modulating the gut microbiota and improving the balance of beneficial bacteria. The mechanism is thought to involve the inhibition of gas-producing pathogenic bacteria and the enhancement of intestinal barrier function. However, results are mixed, and many studies use multi-strain probiotic formulations, making it difficult to isolate the specific effects of L. acidophilus.

Systematic reviews, such as those published in journals like Alimentary Pharmacology & Therapeutics and Gut Microbes, suggest that while probiotics may offer some benefit for bloating and gas, the effect size is generally small and not all individuals respond equally. More high-quality, large-scale studies are needed to confirm these findings and determine optimal strains and dosages. Thus, the scientific support for L. acidophilus use in gas and bloating is present but limited, leading to a moderate evidence rating.

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