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Updated: Jun 14, 2026

Valorization of the Red Seaweed Gracilaria gracilis Through a Biorefinery Approach
Published on: November 21, 2023
Implications for degenerative disorders: antioxidative activity, total phenols, flavonoids, ascorbic acid,
Nurten Ozsoy1, Eda Candoken, Nuriye Akev
1Department of Biochemistry, Faculty of Pharmacy, Istanbul University, Beyazit, Istanbul, Turkey.
Abstract:
In order to demonstrate whether the known biological effects of Aloe vera (L.) Burm. fil. could correlate with the antioxidant activity of the plant, the antioxidant activity of the aqueous leaf extract was investigated. The present study demonstrated that the aqueous extract from A. vera leaves contained naturally occuring antioxidant components, including total phenols, flavonoids, ascorbic acid, beta-carotene and alpha-tocopherol. The extract exhibited inhibitory capacity against Fe(3+)/ascorbic acid induced phosphatidylcholine liposome oxidation, scavenged stable DPPH(*), ABTS(*+) and superoxide anion radicals, and acted as reductant. In contrast, the leaf inner gel did not show any antioxidant activity. It was concluded that the known beneficial effects of Aloe vera could be attributed to its antioxidant activity and could be related to the presence of phenolic compounds and antioxidant vitamins.
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