An investigation of nanoemulsions of tea tree (Melaleuca alternifolia) oil and its main constituent terpinen-4-ol was carried out compared to non-formulated products for their antimicrobial and antioxidant properties. To prepare nanoemulsions from coarse oil-in-water (O/W) emulsions, the products were added to aqueous solutions containing 10% Tween 80 and stirred continuously under ultrasonication...