Melaleuca Alternifolia Leaf Oil

Melaleuca Alternifolia, popularly known as tea tree oil, is one of the more reputed essential oils that trace their origin to Australia, where locals used it since the early 1900s for antiseptic and anti-inflammatory purposes. In fact, during World War II, Australian soldiers carried it in their military kits due to its medicinal benefits. Chemically, it is a very complex mixture with about 100 components, terpinen-4-ol being the main active agent, making up about 40% of the mixture. Other principal constituents include γ-terpinene (23%) and α-terpinene (10%). Though terpinen-4-ol is most effective, other components contribute to its antimicrobial, antiviral, and antifungal activities. According to Clinical Microbiology Reviews,.
For example, in skincare tea tree oil is considered most effective for the treatment of acne because studies have shown that it acts against bacteria called P. acnes, which cause acne. In fact, 5% tea tree oil gel acts just like 5% benzoyl peroxide, a very common anti-acne product. The only problem is that the effectiveness of tea tree oil can be achieved with considerably more time than the use of other products; however, it causes fewer side effects like dryness or irritation.
It is recommended to apply tea tree oil with great caution and only on skin that is insensitive. Never apply tea tree oil undiluted on the skin, since even a drop may cause irritation or allergic reactions, especially from an oxidized oil due to improper storage. The concentration of common allergens in tea tree oil, like limonene, is rather low, but the increased risk of reactions is due to its oxidation products. Because of that, one would want to keep the tea tree oil in a cold, dry, and dark place and use it within a reasonable timeframe.
Overall, such a high efficacy of tea tree oil both as an antibacterial and anti-acne agent, combined with relatively low allergenic potential, ensures that this ingredient remains highly valued in cosmetic dermatology for those with acne-prone skin.