Evidence supporting the use of: Alpha-terpineol
For the health condition: Insect Repellant

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Synopsis

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

Alpha-terpineol is a naturally occurring monoterpene alcohol found in various essential oils, such as pine oil and tea tree oil. There is scientific evidence supporting its use as an insect repellent, albeit limited and primarily derived from laboratory studies. Research has demonstrated that alpha-terpineol possesses repellent activity against certain insect species. For example, studies have reported that alpha-terpineol, either alone or as part of essential oil blends, can repel mosquitoes (e.g., Aedes aegypti) and reduce their landing or feeding activity. Its mechanism is thought to involve interference with the insects’ olfactory receptors, making it harder for them to detect human hosts or attractive odors.

However, the level of evidence is not robust. Most findings come from in vitro or semi-field experiments rather than large-scale, real-world trials. Alpha-terpineol is generally less effective as a repellent compared to established agents like DEET or picaridin. Nonetheless, its inclusion in natural or botanical repellent formulations is scientifically justified based on its observed bioactivity, although its practical efficacy may be moderate. Regulatory bodies have not widely recognized alpha-terpineol as a stand-alone insect repellent, but its use persists in products targeting consumers seeking plant-based alternatives. More research, particularly human field studies, is needed to substantiate its effectiveness and optimize formulations for reliable protection.

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Products containing alpha-terpineol

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