Abstract— Lutein ester was extracted from marigold petals under hexane reflux at 60°C. For protection from oxidation, the as-obtained lutein ester was clathrated with β-cyclodextrin (β-CD) using two methods, viz. grinding lutein ester with β-CD in the presence of ethanol and through the mixing of an ethanol solution of lutein ester with an aqueous solution of β-CD. The results of DSC, IR, H1NMR analyses suggest successful clathration of lutein ester in β-CD. In terms of inclusion efficiency, the former is better than the latter to achieve clathration. We studied factors that can affect the stability of lutein ester such as light, air and temperature change, and the results confirm good stability of the clathrated lutein ester. The toxicity and pharmacokinetic tests on mice showed that the lutein-β-cyclodextrin complex is non-toxic and has an efficient release rate that matches body physiology.
Keywords— Lutein ester; Marigold petals; β-Cyclodextrin; Clathrated compound; Toxicity test.
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