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A gift of the Australian Melaleuca alternifolia plant is the wonderful tea tree oil. This oil has been in the books of home remedies for a very long time now. (1)
However, its use in the treatment of lice infestation is still under debate.
There is not enough research done on the potential anti-lice activity of this oil, but many experts and anecdotal evidence suggest that tea tree oil is worth a try when it comes to keeping lice away.
The role of tea tree oil in lice management is attributed to its anti-inflammatory and antimicrobial properties.
Continue reading to look a little deeper into this topic and see what tea tree oil can do for lice control.
How Effective Is Tea Tree Oil in Killing Hair Lice?
Although there are not enough studies or clinical trials to prove and confirm the anti-lice action of tea tree oil, some preliminary research is available.
In a study, tea tree oil killed all lice in 30 minutes at a 1% concentration, and nerolidol stopped 50% of lice eggs from hatching after four days at a 1% concentration. Combining them (1:2 ratio) killed all lice in 30 minutes and made louse eggs nonviable in 5 days. (2)
Another study, in Australia, that involved 123 participants compared three head lice treatments including one with tea tree oil. The results were impressive. The tea tree oil product worked exceptionally well, making nearly all participants (97.6%) louse-free 1 day after treatment. In fact, researchers deemed it better than pyrethrin-based treatments. (3)
Moreover, a study investigated if various botanicals could help prevent lice infestations. The results showed that the slipperiness of oils, not their repellent properties, limited lice transfer. The conclusion was that tea tree oil and peppermint oil worked best as repellents, and tea tree oil also prevented some lice from feeding. Overall, tea tree oil was the most effective, according to the researchers. (4)
Many dermatologists and hair specialists agree that using tea tree oil to treat lice is not a bad idea as there is some evidence for its activity against lice.
What Makes Tea Tree Oil Effective Against Lice?
Tea tree oil possesses antimicrobial and anti-inflammatory properties, primarily due to its active ingredient terpinen-4-ol. This component is thought to disrupt lice’s ability to flourish and stop the infestation. (1)
Also, some experts add that the viscosity of tea tree oil can make it difficult for lice to move and breathe. This physical obstruction, coupled with the oil’s antimicrobial effects, can help suffocate and disrupt lice spread.
How to Use Tea Tree Oil to Kill Hair Lice?
To use tea tree oil against lice:
- Mix a few drops of it with coconut oil.
- Apply the mixture to your scalp.
- Wait for 30 minutes, and then comb out the dead lice.
- Wash your hair thoroughly to remove the oil.
This remedy is natural and safe, but be careful, as tea tree oil can irritate the skin.
You can also mix 2-3 drops of peppermint or lavender essential oil for added benefits.
Negative Effects of Tea Tree Oil
While tea tree oil is known for its antimicrobial and anti-inflammatory properties, limited research has explored its safety and toxicity. Its historical use spans almost 80 years, suggesting it’s generally safe when used topically. (1)
Tea tree oil can be toxic if ingested, with cases of poisoning reported in animals and humans. Dermal application may lead to irritant or allergic reactions, which can be aggravated by improper storage of the oil.
It’s important to use tea tree oil with caution, avoiding undiluted oil and opting for well-formulated products to reduce the risk of adverse effects.(1)
Most-Asked Questions
Can tea tree oil help with itching from lice infestation?
Yes, the anti-inflammatory properties of tea tree oil can help subside itchiness as it soothes the scalp.
Can I use tea tree oil shampoo?
A good-quality tea tree oil shampoo may prove to be effective against lice.
Final Word
Tea tree oil’s effectiveness against lice remains debated, with limited scientific evidence. It’s believed to work due to its antimicrobial and anti-inflammatory properties. However, proper care is a must when using it as it can irritate the skin and, when ingested, can be toxic.
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