ТЕХНОЛОГІЧНІ ТА БІОМАТЕРІАЛОЗНАВЧІ ПІДХОДИ ДО ОЦІНКИ ЯКОСТІ ЕФІРНИХ ОЛІЙ У КОСМЕЦЕВТИЧНІЙ ПРОМИСЛОВОСТІ

The modern cosmeceutical industry is experiencing rapid growth in demand for natural ingredients, particularly essential oils, necessitating the development of reliable and standardized methods for evaluating their quality, authenticity, and safety. This study presents a comprehensive analysis of contemporary technological and biomaterial science approaches to quality control of popular essential oils, specifically lavender and tea tree oil, which are widely used in cosmetic, therapeutic, and pharmaceutical products.The research is based on the requirements of current European regulatory documents, particularly Regulation (EC) No 655/2013, which establishes clear guidelines for providing scientifically substantiated evidence of cosmetic ingredients' efficacy, stability, and safety. Special attention is given to the problem of essential oil adulteration, which includes common practices such as dilution with cheaper vegetable oils, partial or complete substitution of natural bioactive compounds with synthetic analogues, and the use of technical additives to in-crease product volume. The study revealed that lavender oil fully complies with the international standard ISO 3515:2017 regarding chemical composition and physicochemical proper-ties. In contrast, some tea tree oil samples contained significant adulterants of soybean oil, substantially deviating from the requirements of ISO 4730:2017. The obtained results demonstrate the high efficiency of the proposed integrated approach, combining advanced chemical, spectroscopic, and biological analytical methods. This research holds significant practical value for the cosmeceutical industry by providing a scientifically validated algorithm for detecting adulterated products and emphasizing the critical importance of continuous quality monitoring throughout all stages of the production process. The findings may serve as a foundation for developing new, more stringent quality control standards for essential oils in cos-metic, cosmeceutical, and pharmaceutical applications, ultimately enhancing the safety and efficacy of final products.