Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Henna (Lawsonia inermis) has traditionally been used in various cultures, particularly in South Asia, the Middle East, and North Africa, for its purported insect-repellent properties. Historical and ethnobotanical records indicate that henna paste or oil has been applied to the skin not only for its cooling and decorative effects, but also for its ability to deter insects such as mosquitoes. The characteristic odor of henna, derived from its essential oils and other volatile compounds, is believed to contribute to its repellent action. However, there is minimal scientific research directly validating henna’s effectiveness as an insect repellent. Only a few laboratory studies have investigated its activity against insects, and the results are inconclusive or limited in scope compared to well-established repellents like DEET or citronella. Therefore, while henna’s use as an insect repellent is supported by tradition and anecdotal evidence, it lacks robust scientific validation. Its repellent effect, if any, appears to be mild and not reliably documented by controlled studies. Those seeking effective insect repellents should rely on products with demonstrated efficacy.

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