Plant Comparison
Skullcap vs Breckland Thyme
A side-by-side comparison of two medicinal plants — every documented constituent, action, use, safety note and cited source, assembled automatically from the Omnia Sana database.
At a glance
Skullcap and Breckland Thyme: both belong to the Lamiaceae family.
Key Constituents
Bind the benzodiazepine site of the GABA-A receptor, underlying the calming effect; baicalin is used as the HPLC quality marker, and its content varies widely between commercial tinctures.
GABA is the main inhibitory neurotransmitter and contributes to the anxiolytic activity.
The volatile oil, dominated by thymol and carvacrol, gives most of the antimicrobial and antioxidant activity.
Contribute additional antioxidant activity.
Minor constituents studied for anti-inflammatory activity.
Pharmacological Actions
Anxiolytic for anxiety and nervous tension (the flavonoids baicalin and baicalein bind the benzodiazepine site of the GABA-A receptor); a randomised, double-blind, placebo-controlled crossover trial in healthy volunteers found significantly improved overall mood without loss of energy or cognition; Calming nervine for stress and nervous disorders (traditional)
Traditional & Indicated Uses
Anxiolytic for anxiety and nervous tension (the flavonoids baicalin and baicalein bind the benzodiazepine site of the GABA-A receptor); a randomised, double-blind, placebo-controlled crossover trial in healthy volunteers found significantly improved overall mood without loss of energy or cognition
Sedative / sleep support (insomnia)
Anxiolytic for anxiety and nervous tension (the flavonoids baicalin and baicalein bind the benzodiazepine site of the GABA-A receptor); a randomised, double-blind, placebo-controlled crossover trial in healthy volunteers found significantly improved overall mood without loss of energy or cognition
inferred from gastroprotective action
inferred from anti-inflammatory action
inferred from anticancer action
inferred from gastroprotective action
inferred from antimicrobial action
inferred from anti-inflammatory action
inferred from anti-inflammatory action
Safety, Cautions & Contraindications
Generally well tolerated; its sedative effect can add to that of alcohol, sedatives and sleep medicines, and it may inhibit some drug-metabolising (CYP) enzymes.
Generally safe at culinary doses. Essential oil is highly concentrated and must be diluted before topical use; undiluted application can cause skin sensitisation. Not recommended internally during pregnancy (uterine stimulant effects possible). Phenol-rich thyme preparations should be avoided long-term in high doses. May potentiate anticoagulant medications.
Duke (2002) rates Thymus vulgaris (garden thyme, closely related to breckland thyme) as +++ with clinical evidence (score 2) for antibacterial, bronchospasmolytic, and antispasmodic activities, consistent with Commission E and WHO approvals for bronchitis and upper respiratory catarrh. The primary active constituent is thymol, with carvacrol as a secondary compound. Dose: 1–2 g dried herb as tea three times daily. The plant demonstrates COX-2 inhibitory activity and calcium antagonism, which may explain its antispasmodic effects (Duke, 2002).
External Ids
Botanical Description
Perennial herb (Lamiaceae), 30-80 cm tall, with square stems. Leaves are opposite, ovate to lance-shaped and toothed. Small blue, two-lipped flowers are borne in one-sided leafy racemes arising from the leaf axils; the helmet-shaped calyx gives the genus its 'skullcap' name.[11]
Low, mat-forming, aromatic perennial subshrub with tiny, oval, strongly aromatic leaves on trailing, wiry, hairy stems that root as they spread. Small, pinkish-purple, two-lipped flowers are borne in dense whorled clusters at the stem tips.
Habitat
Native to North America, growing in damp meadows, marshes, streambanks and wet woodland margins.[11]
Grows on dry, sunny heath, grassland, rocky ground and sandy soils; native to Europe and widely distributed across the northern temperate zone.
Harvesting
The whole flowering aerial parts are cut at flowering (summer) and dried. Given the well-documented history of adulteration with toxic germander, sourcing from an authenticated, tested supplier is essential rather than home foraging of an uncertain look-alike.[11]
The flowering aerial parts (flower and leaf) are cut at the start of flowering in summer and dried in a warm, shaded, airy place.
Traditional Uses
American skullcap has a Native American and 19th-century Eclectic-medicine tradition as a calming nervine for anxiety and nervous tension - the old name 'mad-dog skullcap' reflects a folk remedy explored for rabies. Modern research on its flavonoids baicalin and baicalein, which bind the benzodiazepine site of the GABA-A receptor, supports its calming, anxiolytic and sleep-supporting reputation.[11]
Preparations
Dosage
Traditional guidance suggests roughly 1-2 g dried herb per cup as an infusion, up to three times daily, or a tincture per product-specific dosing given known variability in flavonoid content between commercial products. Educational reference only, not a prescription; buy only from a source that has authenticated the species and tested for germander adulteration.
Not documented
References
Drug Class Interactions
Not documented
Lookalikes Review
Dangerous Lookalikes
Not documented
References & Sources
- Di Minno, A., Morone, M.V., Buccato, D.G., De Lellis, L.F. and others (2025) 'Efficacy and Tolerability of a Chemically Characterized Scutellaria lateriflora L. Extract-Based Food Supplement for Sleep Management: A Single-Center, Controlled, Randomized, Crossover, Double-Blind Clinical Trial', Nutrients, 17(9), pp. 1491. doi:10.3390/nu17091491 Randomized trial
https://doi.org/10.3390/nu17091491 - Wolfson, P. and Hoffmann, D.L (2003) 'An investigation into the efficacy of Scutellaria lateriflora in healthy volunteers', Alternative Therapies in Health and Medicine, 9(2), pp. 74-78. Randomized trial
https://scholar.google.com/scholar?q=An%20investigation%20into%20the%20efficacy%20of%20Scutellaria%20lateriflora%20in%20healthy%20volunteers - Di Minno, A., Ullah, H., De Lellis, L.F., Buccato, D.G. and others (2024) 'Efficacy and Tolerability of a Cistus x incanus L. and Scutellaria lateriflora L.-Based Chewing Gum on the Symptoms of Gingivitis: A Monocentric, Randomized, Double-Blind, Placebo-Controlled Clinical Trial', Nutrients, 16(6), pp. 862. doi:10.3390/nu16060862 Randomized trial
https://doi.org/10.3390/nu16060862 - Wilczanska, A., Sparzak-Stefanowska, B., Kokotkiewicz, A., Jesionek, A. and others (2023) 'Biotechnological strategies for controlled accumulation of flavones in hairy root culture of Scutellaria lateriflora L', Scientific Reports, 13(1), pp. 20422. doi:10.1038/s41598-023-47757-7 Preclinical
https://doi.org/10.1038/s41598-023-47757-7 - Cole, I.B., Cao, J., Alan, A.R., Saxena, P.K. and Murch, S.J (2008) 'Comparisons of Scutellaria baicalensis, Scutellaria lateriflora and Scutellaria racemosa: genome size, antioxidant potential and phytochemistry', Planta Medica, 74(4), pp. 474-481. doi:10.1055/s-2008-1034358 Preclinical
https://doi.org/10.1055/s-2008-1034358 - Li, J., Ding, Y., Li, X.C., Ferreira, D. and others (2009) 'Scuteflorins A and B, dihydropyranocoumarins from Scutellaria lateriflora', Journal of Natural Products, 72(6), pp. 983-987. doi:10.1021/np900068t Preclinical
https://doi.org/10.1021/np900068t - Tuan, P.A., Kim, Y.S., Kim, Y., Thwe, A.A. and others (2016) 'Molecular characterization of flavonoid biosynthetic genes and accumulation of baicalin, baicalein, and wogonin in plant and hairy root of Scutellaria lateriflora', Saudi Journal of Biological Sciences, 25(8), pp. 1639-1647. doi:10.1016/j.sjbs.2016.08.011 Preclinical
https://doi.org/10.1016/j.sjbs.2016.08.011 - Gafner, S., Bergeron, C., Batcha, L.L., Reich, J. and others (2003) 'Inhibition of [3H]-LSD binding to 5-HT7 receptors by flavonoids from Scutellaria lateriflora', Journal of Natural Products, 66(4), pp. 535-537. doi:10.1021/np0205102 Preclinical
https://doi.org/10.1021/np0205102 - Gafner, S., Bergeron, C., Batcha, L.L., Angerhofer, C.K. and others (2003) 'Analysis of Scutellaria lateriflora and its adulterants Teucrium canadense and Teucrium chamaedrys by LC-UV/MS, TLC, and digital photomicroscopy', Journal of AOAC International, 86(3), pp. 453-460. doi:10.1093/jaoac/86.3.453 Preclinical
https://doi.org/10.1093/jaoac/86.3.453 - Sun, J. and Chen, P (2011) 'A flow-injection mass spectrometry fingerprinting method for authentication and quality assessment of Scutellaria lateriflora-based dietary supplements', Analytical and Bioanalytical Chemistry, 401(5), pp. 1577-1584. doi:10.1007/s00216-011-5246-2 Preclinical
https://doi.org/10.1007/s00216-011-5246-2 - Awad, R., Arnason, J.T., Trudeau, V., Bergeron, C., Budzinski, J.W., Foster, B.C. and Merali, Z (2003) 'Phytochemical and biological analysis of skullcap (Scutellaria lateriflora L.): a medicinal plant with anxiolytic properties', Phytomedicine. doi:10.1078/0944-7113-00374 Traditional / reference
https://doi.org/10.1078/0944-7113-00374 - Gao, J. and Sanchez-Medina, A. and Pendry, B.A. and Hughes, M.J. and Webb, G.P. and Corcoran, O (2008) 'Validation of a HPLC method for flavonoid biomarkers in skullcap (Scutellaria) and its use to illustrate wide variability in the quality of commercial tinctures', Journal of Pharmacy & Pharmaceutical Sciences, 11(1), pp. 77--87. doi:10.18433/j39g6v Preclinical
https://doi.org/10.18433/j39g6v - Brock, C. and Whitehouse, J. and Tewfik, I. and Towell, T (2014) 'American Skullcap (Scutellaria lateriflora): a randomised, double-blind placebo-controlled crossover study of its effects on mood in healthy volunteers', Phytotherapy Research, 28(5), pp. 692--698. doi:10.1002/ptr.5044 Randomized trial
https://doi.org/10.1002/ptr.5044 - Ghasemzadeh Rahbardar, M. and Hosseinzadeh, H (2024) 'Therapeutic potential of hypnotic herbal medicines: A comprehensive review', Phytotherapy Research, 38(6), pp. 3037-3059. doi:10.1002/ptr.8201 Meta-analysis / review
https://doi.org/10.1002/ptr.8201 - Block, K.I., Gyllenhaal, C. and Mead, M.N (2004) 'Safety and efficacy of herbal sedatives in cancer care', Integrative Cancer Therapies, 3(2), pp. 128-148. doi:10.1177/1534735404265003 Meta-analysis / review
https://doi.org/10.1177/1534735404265003 - Lin, L.Z. and Harnly, J.M. and Upton, R (2009) 'Comparison of the phenolic component profiles of skullcap (Scutellaria lateriflora) and germander (Teucrium canadense and T. chamaedrys), a potentially hepatotoxic adulterant', Phytochemical Analysis, 20(4), pp. 298-306. doi:10.1002/pca.1127 Preclinical
https://doi.org/10.1002/pca.1127 - Pacifico, S. and D'Abrosca, B. and Scognamiglio, M. and D'Angelo, G. and Gallicchio, M. and Galasso, S. and Monaco, P. and Fiorentino, A (2012) 'NMR-based metabolic profiling and in vitro antioxidant and hepatotoxic assessment of partially purified fractions from Golden germander (Teucrium polium L.) methanolic extract', Food Chemistry, 135(3), pp. 1957-67. doi:10.1016/j.foodchem.2012.06.071 Preclinical
https://doi.org/10.1016/j.foodchem.2012.06.071
- Jalil, B., Pischel, I., Feistel, B., Suarez, C. and others (2024) 'Wild thyme (Thymus serpyllum L.): a review of the current evidence of nutritional and preventive health benefits', Frontiers in Nutrition, 11, pp. 1380962. doi:10.3389/fnut.2024.1380962 Meta-analysis / review
https://doi.org/10.3389/fnut.2024.1380962 - Sonmezdag, A.S., Kelebek, H. and Selli, S (2016) 'Characterization of aroma-active and phenolic profiles of wild thyme (Thymus serpyllum) by GC-MS-Olfactometry and LC-ESI-MS/MS', Journal of Food Science and Technology, 53(4), pp. 1957-1965. doi:10.1007/s13197-015-2144-1 Preclinical
https://doi.org/10.1007/s13197-015-2144-1 - Pavlic, B., Mrkonjic, Z., Teslic, N., Kljakic, A.C. and others (2022) 'Natural Deep Eutectic Solvent (NADES) Extraction Improves Polyphenol Yield and Antioxidant Activity of Wild Thyme (Thymus serpyllum L.) Extracts', Molecules, 27(5), pp. 1508. doi:10.3390/molecules27051508 Preclinical
https://doi.org/10.3390/molecules27051508 - Mrkonjic, Z., Kaplan, M., Milosevic, S., Bozovic, D. and others (2024) 'Green Extraction Approach for Isolation of Bioactive Compounds in Wild Thyme (Thymus serpyllum L.) Herbal Dust-Chemical Profile, Antioxidant and Antimicrobial Activity and Comparison with Conventional Techniques', Plants, 13(6), pp. 897. doi:10.3390/plants13060897 Preclinical
https://doi.org/10.3390/plants13060897 - Sokolic-Mihalak, D., Frece, J., Slavica, A., Delas, F. and others (2012) 'The effects of wild thyme (Thymus serpyllum L.) essential oil components against ochratoxin-producing Aspergilli', Arhiv za Higijenu Rada i Toksikologiju, 63(4), pp. 457-462. doi:10.2478/10004-1254-63-2012-2309 Preclinical
https://doi.org/10.2478/10004-1254-63-2012-2309 - Jaric, S., Mitrovic, M. and Pavlovic, P (2015) 'Review of Ethnobotanical, Phytochemical, and Pharmacological Study of Thymus serpyllum L', Evidence-Based Complementary and Alternative Medicine, 2015, pp. 101978. doi:10.1155/2015/101978 Meta-analysis / review
https://doi.org/10.1155/2015/101978 - Loziene, K., Vaiciuniene, J. and Venskutonis, P.R (1998) 'Chemical composition of the essential oil of creeping thyme (Thymus serpyllum s.l.) growing wild in Lithuania', Planta Medica, 64(8), pp. 772-773. doi:10.1055/s-2006-957582 Preclinical
https://doi.org/10.1055/s-2006-957582 - Raal, A., Paaver, U., Arak, E. and Orav, A (2004) 'Content and composition of the essential oil of Thymus serpyllum L. growing wild in Estonia', Medicina (Kaunas), 40(8), pp. 795-800. Preclinical
https://scholar.google.com/scholar?q=Content%20and%20composition%20of%20the%20essential%20oil%20of%20Thymus%20serpyllum%20L.%20growing%20wild%20in%20Estonia - Bozkurt, E., Atmaca, H., Kisim, A., Uzunoglu, S. and others (2012) 'Effects of Thymus serpyllum extract on cell proliferation, apoptosis and epigenetic events in human breast cancer cells', Nutrition and Cancer, 64(8), pp. 1245-1250. doi:10.1080/01635581.2012.719658 Preclinical
https://doi.org/10.1080/01635581.2012.719658 - Jovanovic, A.A., Levic, S.M., Pavlovic, V.B., Markovic, S.B. and others (2021) 'Freeze vs. Spray Drying for Dry Wild Thyme (Thymus serpyllum L.) Extract Formulations: The Impact of Gelatin as a Coating Material', Molecules, 26(13), pp. 3933. doi:10.3390/molecules26133933 Preclinical
https://doi.org/10.3390/molecules26133933 - European Medicines Agency (2010) 'Assessment report on Thymus vulgaris L., herba and Thymus zygis L., herba'. Traditional / reference
https://scholar.google.com/scholar?q=Assessment%20report%20on%20Thymus%20vulgaris%20L.%2C%20herba%20and%20Thymus%20zygis%20L.%2C%20herba - Kempe, K., Doerfler, G., Bader, D. and Wicht, M (2011) 'Activity of Thymus serpyllum against oral pathogens', 9(1), pp. 23--28. Traditional / reference
https://scholar.google.com/scholar?q=Activity%20of%20Thymus%20serpyllum%20against%20oral%20pathogens - Royal Botanic Gardens, Kew (n.d.). Available at: https://powo.science.kew.org Traditional / reference
https://powo.science.kew.org - Duke, J.A (2002) 'Handbook of Medicinal Herbs, Second Edition'. Traditional / reference
https://scholar.google.com/scholar?q=Handbook%20of%20Medicinal%20Herbs%2C%20Second%20Edition
Generated automatically from the Omnia Sana plant database and its cited sources. For educational purposes only — not medical advice. Always consult a qualified practitioner before using medicinal plants.