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7560650 
Journal Article 
Chemical Composition and α -Glucosidase Inhibitory Activity of Vietnamese Citrus Peels Essential Oils 
Dang, NHai; Nhung, PH; Mai Anh, BuiThi; Thu Thuy, DThi; Minh, CVan; Dat, NT; , 
2016 
Yes 
Journal of Chemistry
ISSN: 2090-9063
EISSN: 2090-9071 
1-5 
Background . Inhibition of α -glucosidase is an important factor to control postprandial hyperglycemia in type 2 diabetes mellitus. Citrus essential oils (CEO) are among the most widely used essential oils, and some of them exhibited promising antidiabetic effect. However, the α -glucosidase inhibition of CEO has not been investigated so far. The present work aims to evaluate the α -glucosidase inhibition of essential oils from six Vietnamese Citrus peels. Methods . The chemical composition of essential oils obtained by hydrodistillation from six Citrus peels was analyzed by GC-MS. All essential oils were tested for their inhibitory activity on α -glucosidase using p -nitrophenyl- α -D-glucopyranoside as substrate. Results . In Buddha’s hand and lime peels, the major components were limonene (59.0–61.31%) and γ -terpinene (13.98–23.84%) while limonene (90.95–95.74%) was most abundant in pomelo, orange, tangerine, and calamondin peels. Among the essential oils, the Buddha’s hand oil showed the most significant α -glucosidase inhibitory effect with the IC 50 value of 412.2  μ g/mL. The combination of the Buddha’s hand essential oil and the antidiabetic drug acarbose increased the inhibitory effect. Conclusions . The results suggested the potential use of Buddha’s hand essential oil as an alternative in treatment of type 2 diabetes mellitus.