GREEN TEA HAIR TONIC FOR GREASY SCALP 165 green tea emulsions that were tested on the face (approximately 35% for 28 days and 29% for 30 days of treatment 14,15). Topical therapy of oily scalp by application of a green tea hair tonic has been proposed. Overgrowth of sebaceous glands generates suitable conditions for proliferation of Malas- sezia spp. and such conditions should be suppressed accordingly. Scalp and hair disorders such as itching, dandruff, and hair loss can, therefore, be treated with the proposed green tea hair tonic. The clinical effi cacy of the green tea hair tonic might be enhanced at higher concentrations (4.5% and 7%) along with the increased antioil effi cacy and a lack of skin irritation, although the 2% green tea may be more feasible from an economic perspective. Further assessment of the suppression of oil on the scalp or face by these preparations is necessary. ACKNOWLEDGMENT We acknowledge Mae Fah Luang University for facility support during the manuscript preparation. REFERENCES (1) C. A. Elmets, D. Singh, K.Tubesing, M. Matsui, S. Katiyar, and H. Mukhtar, Cutaneous photoprotec- tion from ultraviolet injury by green tea polyphenols, J. Am. Acad. Dermatol., 44, 425–432 (2001). (2) S. K. Kartiyar and C. A. Elmets, Green tea polyphenolic antioxidants and skin photoprotection, Int. J. Oncol., 18, 1307–1313 (2001). (3) T. Aburjai and F. M. Natsheh, Plants used in cosmetics, Phytotherapy Res., 17, 987–1000 (2003). (4) S. Hsu, Green tea and the skin, J. Am. Acad. Dermatol., 52, 1049–1059 (2005). (5) P. Chuarienthong, N. Lourith, and P. Leelapornpisid, Clinical effi cacy comparison of anti-wrinkle cos- metics containing herbal fl avonoids, Int. J. Cosmet. Sci., 32, 99–106 (2010). (6) N. Lourith and M. Kanlayavattanakul, Hair loss and herbs for treatment, J. Cosmet. Dermatol., 12, 210–212 (2013). Figure 2. Effi cacy of scalp sebum reduction.
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