Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Bifidobacterium animalis is a probiotic bacterium that has been studied for its potential to support lactose digestion and alleviate symptoms of lactose intolerance. The scientific rationale is based on the ability of certain probiotic strains, including B. animalis (particularly B. animalis subsp. lactis), to produce the enzyme beta-galactosidase (lactase), which can help break down lactose in the gut. Several clinical studies have evaluated the effects of B. animalis-containing probiotic products on lactose intolerance. Some randomized controlled trials have shown that regular consumption of dairy products fermented with B. animalis may improve lactose digestion and reduce gastrointestinal symptoms such as bloating and diarrhea in lactose-intolerant individuals, though these effects are often modest and may depend on the probiotic dose and the individual's baseline gut microbiota.

Meta-analyses and systematic reviews of probiotics for lactose intolerance generally indicate a small but significant benefit, with multi-strain formulations often performing better than single strains. While B. animalis is not as extensively studied as Lactobacillus acidophilus or Bifidobacterium longum in this context, there is a reasonable body of evidence supporting its potential utility. The strength of evidence is moderate (rated 3 out of 5), with more research needed to confirm its efficacy and to clarify which strains and dosing regimens are most effective for managing lactose intolerance symptoms.

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