Synopsis

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

Geraniol is a monoterpenoid and an alcohol found in essential oils such as rose oil, citronella oil, and palmarosa oil. There is some scientific evidence supporting its antibacterial properties. In vitro studies have demonstrated that geraniol possesses significant antibacterial activity against a range of Gram-positive and Gram-negative bacteria, including Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa. Several mechanisms have been proposed for its antibacterial action, such as disruption of bacterial cell membranes and interference with microbial enzyme activity.

Despite promising laboratory data, the evidence for geraniol’s effectiveness in treating bacterial infections in humans is limited. Most available studies are preclinical and performed in vitro or in animal models. There are few, if any, well-controlled clinical trials evaluating its safety and efficacy for human infections. Historically, geraniol-containing essential oils have been used in traditional medicine, but this use has generally been associated with the broader activity of the essential oil rather than geraniol alone. Therefore, while scientific research suggests potential antibacterial activity, the clinical evidence remains insufficient, and more rigorous human studies are needed to determine its practical value in supporting or treating bacterial infections.

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