Active ingredient
Tea Tree Oil
INCIMelaleuca Alternifolia Leaf Oil
1.5%Typical concentration
Last reviewed by BIOSAR Scientific Team, PharmD, Cosmetic Chemistry, Pharmacy practice on .
What it is
Tea tree oil is the essential oil distilled from Melaleuca alternifolia, used in skincare to reduce visible blemishes and support surface-balancing care. Its principal active, terpinen-4-ol, disrupts microbial cell membranes and dampens C. acnes-driven redness. Effective at 1% to 5% in cosmetic leave-on formulations; higher concentrations risk contact irritation. Combine carefully with retinol or strong acids. Patch-test before facial use.
Pregnancy and breastfeeding
Use with caution
Use with caution — consult your clinician.
Topical tea tree oil at low cosmetic concentrations is generally considered acceptable during pregnancy and lactation. Mother to Baby cautions that human pregnancy data are limited; oral use is avoided.
Mechanism in detail
What Tea Tree Oil does
Essential oil valued for its purifying affinity with blemish-prone skin. It supports a clearer, calmer-looking surface, and is dosed at a balanced level so it stays effective without overwhelming sensitive skin.
Evidence
What the research says
- 3.55×Clears blemishes over 3× better than placeboIn a randomized, double-blind, placebo-controlled trial, 5% tea tree oil gel was 3.55 times more effective than placebo at reducing total acne lesion count. It also cut acne severity 5.75 times more than placebo.Read the study →Indian J Dermatol Venereol Leprol 2007
From the BIOSAR catalog
