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Polyphenols from Honeybush tea (Cyclopia intermedia)
B Irene Kamara1, E Vincent Brandt, Daneel Ferreira
1Department of Chemistry, University of the Free State, P.O. Box 339, Bloemfontein, 9300 South Africa. Brandtev.sci@mail.uovs.ac.za
Journal of Agricultural and Food Chemistry
|June 12, 2003
Summary
Honeybush tea, derived from Cyclopia intermedia, contains antioxidants and phenolics. These compounds, including flavonoids, may explain its traditional health benefits for respiratory issues.
Area of Science:
- Phytochemistry
- Pharmacognosy
- Herbal Medicine
Background:
- Cyclopia intermedia, indigenous to South Africa, is used for Honeybush tea.
- This herbal tea is traditionally used for respiratory ailments and is noted for low tannin and caffeine content.
- The plant is recognized for its antioxidant properties.
Purpose of the Study:
- To investigate the phenolic compounds in the leaves and stems of Cyclopia intermedia.
- To correlate the identified compounds with the plant's claimed health-promoting properties.
Main Methods:
- Chemical analysis of Cyclopia intermedia extracts.
- Structure elucidation using Nuclear Magnetic Resonance (NMR), Circular Dichroism (CD), and Mass Spectrometry (MS).
Main Results:
- Identified tyrosol, a methoxy analogue, glycosylated flavonols, isoflavones, flavanones, and flavones.
- Confirmed the presence of various phenolic compounds in the plant material.
Conclusions:
- The identified phenolics, particularly flavonoids, are likely responsible for the antioxidant activity.
- These compounds may contribute to the traditional health benefits of Honeybush tea, especially for respiratory conditions.