Abstract
The three main objectives of this study were to evaluate the extracted essential oil in terms of total phenolic and flavonoids contents, radical scavenging activity and sun protection factor. The antioxidant activity of the essential oil was determined by using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity while the content of total phenol was determined by using Folin-Ciocalteu reagent. Aluminium chloride colorimetric method was used for flavonoid content determination while photo-protective potential was determined by using Mansur’s sun protection factor (SPF) value. The extracted essential oil was found to contain low levels of total phenolic contents (2.30±0.003 µg/g as garlic acid equivalent) and total flavonoid contents (254.99±0.64 µg/g as quercetin equivalent) respectively. DPPH free radical scavenging activity of the essential oil was 40.73%±1.32 at 200µg/ml. The Mansur’s equation of sun protective factor showed that the essential oil possesses some sun protective potentials. This study suggests that the essential oil from Etlingera elatior could be potentially used as a new source of natural antioxidant and ingredient that can be incorporated into the sunscreen cosmetic products.
Highlights
The essential oil is an odorous and volatile product that originates from plant species
This study suggests that the essential oil from Etlingera elatior could be potentially used as a new source of natural antioxidant and ingredient that can be incorporated into the sunscreen cosmetic products
According to literature, there was only one study that had reported on the antioxidant properties from the Etlingera elatior (EE) essential oil (Abdelwahab et al, 2010) while no exploration was done on the photo-protective activity
Summary
The essential oil is an odorous and volatile product that originates from plant species. These plant species usually produce characteristic aroma from different plant parts: leaves, stems, flowers and roots or rhizomes. According to literature, there was only one study that had reported on the antioxidant properties from the EE essential oil (Abdelwahab et al, 2010) while no exploration was done on the photo-protective activity. Since the anti-oxidant properties were not fully studied and the photo-protective potential of the EE essential oil were not explored, this research were carried out with three objectives; which are to evaluate, (i) the total phenolic and flavonoids contents, (ii)the radical scavenging activity and,(iii)the sun protection factor of the EE essential oil
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