Antioxidant activity of six Portuguese thyme species essential oils
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Abstract The essential oils of Thymus caespititius, T. camphoratus, T. capitellatus, T. carnosus, T. pulegioides, T. zygis subsp. zygis and T. zygis subsp. sylvestris collected in different regions of Portugal, including the Azores islands, were evaluated for preventing lipid peroxidation and scavenging free radicals, and hydroxyl and superoxide anions. T. zygis subsp. zygis oil possessed the best capacity for preventing lipid peroxidation (IC50 = 0.030 ± 0.003 mg/ml), immediately followed by the oils isolated from T. zygis subsp. sylvestris collected in different regions of Portugal. IC50 values ranged from 0.066 ± 0.003 to 0.087 ± 0.001 mg/ml in oils isolated from samples from Alcanena and Duas Igrejas, respectively. The oils isolated from T. zygis subsp. sylvestris, independent of the harvesting region, were shown to be the most effective for scavenging free radicals (0.358–0.453 mg/ml). The best capacity for scavenging hydroxyl radicals was found in the oils of T. camphoratus collected in Espartal and of T. caespititius of Lordelo, with IC50 < 0.5 mg/ml. The low oil amount did not allow IC50 values for the superoxide anion scavenging determination, therefore considering a unique oil concentration (5 mg/ml), the highest inhibition percentages (?50%) were registered with the essential oils of T. zygis subsp. sylvestris from Duas Igrejas and Covão do Coelho, and of T. capitellatus from Sines. Copyright © 2010 John Wiley & Sons, Ltd.
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Thymus zygis subsp. zygis and Thymus zygis subsp. sylvestris essential oils from different regions of Portugal showed good antioxidant activities in the TBARS assay, even better than BHT.
“Thymus zygis subsp. zygis and Thymus zygis subsp. sylvestris oils obtained from different regions of Portugal showed good antioxidant activities, even better than that of BHT.”
From Antioxidant and Anti-Inflammatory Activities of Essential Oils: A Short Review (2010) · cites this paper as [53]
Portuguese Thymus camphoratus, Thymus caespititius and Thymus capitellatus oils were significantly more effective in scavenging hydroxyl radicals than the remaining samples; oils with thymol or carvacrol predominating did not present significant activities, indicating phenolic compounds are not determinant for hydroxyl radical scavenging.
“Among Portuguese Thymus species collected in different places of this country, Thymus camphoratus Hoffmanns. & Link, Thymus caespititius Brot., and Thymus capitellatus Hoffmanns. & Link oils from different origins were significantly more effective in scavenging hydroxyl radicals than the remaining samples.”
From Antioxidant and Anti-Inflammatory Activities of Essential Oils: A Short Review (2010) · cites this paper as [53]
Of 28 Portuguese Thymus oils, only Thymus zygis ssp. sylvestris and Thymus capitellatus had superoxide anion scavenging activity >50%; results indicate phenolic compounds are not the only ones able to scavenge superoxide anion.
“From the 28 essential oils evaluated, only Thymus zygis ssp. sylvestris and Thymus capitellatus collected in diferent places of Portugal had superoxide anion scavenging activity >50%.”
From Antioxidant and Anti-Inflammatory Activities of Essential Oils: A Short Review (2010) · cites this paper as [53]
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“Their application is probably limited by time-consuming procedure complicated by the addition of many reagents to evaluate the hydroxyl radical-scavenging activity [15, 22] and the need to use fluorescent detection for peroxyl radicals [21, 23].”
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“Antiradical activity of S. officinalis samples was assayed according to the method of Dandlen et al. (2010).”
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Application of essential oils as antioxidant agents
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Evaluación de la actividad inmunomoduladora de biomoléculas de origen vegetal
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- Authors
- Dandlen, S. A., Lima, A. S., Mendes, M. D., Miguel, M. G., Faleiro, M. L., Sousa, M. J., Pedro, L. G., Barroso, J. G., & Figueiredo, A. C.
- Affiliations
- University of Algarve (PT)
- University of Lisbon (PT)
- Universidade Politécnica de Bragança (PT)
- Corresponding author
- Miguel, M. Graça
- ORCID
- Venue
- Flavour and Fragrance Journal
- Publisher
- Wiley
- Published
- 2010-01-18
- Volume
- 25
- Issue
- 3
- Pages
- 150-155
- ISSN
- 0882-5734 (ISSN-L)
- 1099-1026
- OpenAlex
- W2040459664
- Cited by
- 71
- References
- 19
- Citations by year
- 2026: 1 · 2025: 3 · 2024: 4 · 2023: 3 · 2022: 6 · 2021: 4 · 2020: 6 · 2019: 3 · 2018: 6 · 2017: 4 · 2016: 3 · 2015: 6 · 2014: 2 · 2013: 6 · 2012: 4
- FWCI
- 9.81
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Flavour and Fragrance Journal (publishedVersion)
- Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) (submittedVersion, other-oa)
- Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) (submittedVersion)
- Funders
- Fundação para a Ciência e a Tecnologia
- Topics
- Life Sciences › Agricultural and Biological Sciences › Food Science › Essential Oils and Antimicrobial Activity
- Health Sciences › Medicine › Biochemistry › Phytochemicals and Antioxidant Activities
- Physical Sciences › Chemistry › Organic Chemistry › Edible Oils Quality and Analysis
- Keywords
- thyme essential oil, thymus, antioxidant activity, lipid peroxidation inhibition, free radical scavenging, hydroxyl radical scavenging, superoxide radical scavenging, Thymus carnosus, Thymus pulegioides, regional variation, Azores
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