Medicinal Uses
According to advocates of alternative medicine, lavender oil can be used as an antiseptic and pain reliever to be applied to minor burns and insect bites and stings.
It is also said to treat a variety of common ailments, such as sunburn and sunstroke. It can also be used in massage oil mixtures, which may be effective in the relief of joint and muscle pain, or in chest rub mixtures for the relief of asthmatic and bronchitic spasm. It is also said to treat head lice when used in a hair rinse mixture, or on a fine comb to eliminate nits.One study suggests application of lavender essential oil instead of povidone-iodine for episiotomy wound care.
In vitro, lavender oil is cytotoxic as well as photosensitizing. A study demonstrated that lavender oil is cytotoxic to human skin cells in vitro (endothelial cells and fibroblasts) at a concentration of 0.25%. Linalool, a component of lavender oil, reflected the activity of the whole oil, indicating that linalool may be the active component of lavender oil. The result of another study showed that aqueous extracts reduced mitotic index, but induced chromosome aberrations and mitotic aberrations in comparison with control, significantly. Aqueous extracts induced breaks, stickiness, pole deviations and micronuclei. Furthermore, these effects were related to extract concentrations.
However, according to a 2005 study "although it was recently reported that lavender oil, and its major constituent linalyl acetate, are toxic to human skin cells in vitro, contact dermatitis to lavender oil appears to occur at only a very low frequency. The relevance of this in vitro toxicity to dermatological application of Lavandula oils remains unclear."
In terms of phototoxicity, a 2007 investigative report from European researchers stated that, "Lavender oil and sandalwood oil did not induce photohaemolysis in our test system. However, a few reports on photosensitivity reactions due to these substances have been published, e.g. one patient with persistent light reaction and a positive photo-patch test to sandalwood oil."
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