While these findings echo previous studies on the antimicrobial potential of plant-based ingredients, they further emphasize the insights gained specifically from gentian and macadamia oil in the context of skincare applications. Despite the observed antibacterial activity of herbal treatments, the results reinforce the dominant efficacy of established antibiotics, particularly gentamicin, in combatting more serious bacterial infections. Nevertheless, the potential influence of confounding factors—such as variations in bacterial strains, concentrations of treatments, and environmental variables—suggests a need for cautious interpretation of the results.

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