Synopsis

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

Lactococcus rhamnosus has some emerging scientific evidence suggesting a potential role in supporting the management and prevention of certain skin infections, though the evidence is still limited and not yet robust. Most studies focus on the closely related Lactobacillus rhamnosus (not Lactococcus), especially the GG strain, which has been investigated for its effects on atopic dermatitis and other skin conditions. These studies indicate that oral supplementation with certain probiotic strains may help modulate the immune response, reduce inflammation, and improve skin barrier function, which could offer benefits in the context of skin infections or inflammatory skin diseases.

However, direct clinical studies of Lactococcus rhamnosus specifically for the treatment or prevention of skin infections in humans are sparse. Some in vitro studies suggest that certain Lactococcus strains can inhibit the growth of pathogenic bacteria on the skin and may enhance local immune responses. Animal model studies have shown changes in skin microbiota and reduced infection severity after probiotic administration. Despite these findings, clinical validation in human subjects remains preliminary, and the majority of the evidence comes from related probiotic species and strains rather than Lactococcus rhamnosus itself. As such, while there is a scientific rationale and some early support, the overall level of evidence is low to moderate (rated 2/5).

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