Across 4 review studies, 4 reported beneficial effects of Lactobacillus acidophilus L-92 on allergic symptoms, with effect sizes ranging from small to moderate (predominantly moderate). All included studies were reviews without original data, and none reported statistical significance or a specific dose range, limiting the precision of these findings. The evidence is drawn entirely from review articles citing human clinical trials for conditions such as atopic dermatitis, allergic rhinitis, and pollen allergy.
Caveats: Available evidence is overwhelmingly positive — clinical literature in this area is subject to publication bias (null-result studies are less likely to be published or indexed). Evidence base is small (only 4 studies) — conclusions should be considered preliminary. Many of the included studies did not reach statistical significance — effect may be smaller than the predominant direction suggests. All four studies are reviews, not original trials, and lack specific dosing, duration, and sample size data.
Lactobacillus acidophilus L-92 has been reported to improve symptoms in patients with atopic dermatitis and allergic rhinitis in human studies.
Lactobacillus acidophilus L-92 has been reported to help prevent and manage gastrointestinal and systemic disorders.
A number of preclinical and clinical studies suggest that these biotics and metabolites have promising health effects...
Lactobacillus acidophilus L-92 has been reported to alleviate symptoms of pollen allergy, atopic dermatitis, and house dust mite allergy in human clinical studies.