The Ayurvedic Herbal Oil May Protect Skin and Hair
Neem oil is a natural substance extracted from the seeds of the neem tree (Azadirachta indica), an evergreen native to India. Long used in certain systems of traditional medicine (such as Ayurveda), neem oil is thought to offer a number of benefits when applied to the skin and/or hair. Neem oil contains several fatty acids thought to be beneficial to the skin, such as oleic acid and linoleic acid.
In alternative medicine, neem oil is often used in the treatment of problems like dandruff and dry scalp. In these cases, neem oil is typically diluted in a carrier oil, massaged into the scalp, and left to sit for a period of time (usually 30 minutes or more) before rinsing.
In addition, neem oil is used to treat nail fungus and acne. Neem oil is also said to soften the skin.
Some proponents also suggest that neem oil can act as a natural insect repellent. Known as "azadirachtins," certain compounds found in neem oil are thought to possess insecticidal properties.
Although research on the medicinal use of neem oil is fairly limited, there's some evidence that neem oil may act as an antimicrobial (a type of substance that kills or inhibits the growth of microorganisms, such as bacteria and fungi).
A number of studies also show that shampoos containing neem oil may help treat head lice. In a 2011 study published in Parasitology Research, for example, scientists used a neem-based shampoo on 12 children with head lice. They found that a one-time, 10-minute treatment with the shampoo destroyed all head lice. Repeating the experiment with eight other children, the study's authors observed that a one-time, 20-minute treatment delivered similar results. What's more, several other studies suggest that that neem-based shampoo may get rid of head lice and their eggs without triggering any side effects.
Additionally, preliminary research indicates that neem oil may help protect against insect bites. In a study published in the Southeast Asian Journal of Tropical Medicine and Public Health in 1995, for instance, scientists discovered that a blend of neem oil and coconut oil may act as a mosquito repellent.