Tea Tree Oil
Oil from the tea tree plant, widely used for its antiseptic and anti-inflammatory properties.
What does Tea Tree Oil do for skin?
Tea Tree Oil (TTO), primarily due to its active component terpinen-4-ol, exerts its effects through antimicrobial and anti-inflammatory mechanisms. It disrupts bacterial cell membranes, leading to leakage of intracellular contents and inhibition of respiratory processes, thereby targeting microbes like *Cutibacterium acnes*. In terms of anti-inflammatory action, terpinen-4-ol can suppress the production of pro-inflammatory cytokines (e.g., TNF-alpha, IL-1beta, IL-8) and modulate neutrophil function, reducing redness and swelling in the skin.
Typical concentration: 0.1-10% (most formulas for anti-acne or antimicrobial effects often use 0.5-5%)
Is Tea Tree Oil safe?
The CIR Expert Panel has deemed Tea Tree Oil safe in cosmetics when formulated to avoid irritation and sensitization potential, typically below 10%. It can cause contact dermatitis (both irritant and allergic) in susceptible individuals, particularly when oxidized or used at higher concentrations. Proper storage is crucial to prevent oxidation, which increases sensitizing compounds.
What does the research say about Tea Tree Oil?
A comparative study of tea tree oil versus benzoyl peroxide in the treatment of acne.
Bassett IB, et al. Med J Aust. 1990 Dec 17-31;153(12):876.
Hart PH, et al. Inflamm Res. 2000 Nov;49(11):619-26.
Melaleuca alternifolia (Tea Tree) oil: a review of antimicrobial and other medicinal properties.
Carson CF, et al. Clin Microbiol Rev. 2006 Jan;19(1):50-62.