Encyclopedia/Botanical/TEM · Folk medicine/encyclopedia-common-thyme

Common Thyme

Thymus vulgaris

Sources

4 listed

Best forFor readers who want to learn about thyme as a traditional remedy for productive cough associated with a cold, including as a warm tea.

Clinical evidence

Emerging

SafetyUsually well toleratedCulinary thyme, medicinal tea and concentrated thyme oil require different assessments. Thyme preparations can cause allergic reactions and stomach complaints. Age limits depend on the preparation; medicinal use during pregnancy and breastfeeding is not recommended because adequate data are lacking. Honey must not be given to infants under twelve months.

Tradition

TEMFolk medicine

Common preparations

Fresh LeavesTeaTinctureSyrupEssential Oil cautionThyme Honey

In short

Summary of findings for quick reference

Thyme has a long European herbal tradition. Ancient texts describe thymos or thymum for respiratory complaints, but identification with modern Thymus vulgaris is uncertain. Later herbals, including Culpeper’s thyme entry, provide more concrete records. Walahfrid Strabo’s Hortulus, often cited as a bridge to monastic medicine, contains no corresponding thyme entry. The available sources therefore do not establish continuous documentation of the same species and cough indication.

The clinical picture is narrower than the long tradition, and it carries an important footnote. Most of the modern cough evidence comes from fixed combination products, above all thyme herb plus ivy leaf extract and thyme plus primrose, studied by Kemmerich and colleagues in 2006 and 2007 in adults with acute bronchitis, who reported a faster reduction in coughing fits than placebo. That signal belongs to the combination, not to thyme alone. The honest reading of a single-herb cup of thyme tea is a traditionally established, generally well tolerated supportive herb, not a proven treatment for bronchitis.

The EMA HMPC monograph for Thymi herba covers the herb of Thymus vulgaris and Thymus zygis. It describes traditional use only for productive cough associated with colds, including medicinal tea, and contains no digestive indication. Age limits depend on the preparation; tea use is not recommended under twelve years. Thyme essential oil requires separate assessment. Honey must not be given to infants under twelve months because of the botulism risk.

Clinical evidence ↔ Historical significance

We display two separate evidence categories: clinical evidence from modern trials and historical significance from documented healing tradition. Both are valuable, but they answer different questions.

In every encyclopedia entry we evaluate two distinct categories of evidence. Clinical evidence as used in trials meets a narrower but scientifically essential bar. At the same time, the hundreds of thousands of plant species worldwide have only partially been captured and tested in modern studies.

Alongside the trial picture our researchers compile a comprehensive overview of where and since when a plant has been used across different traditions of natural medicine. When a plant has been used as a medicinal plant in many cultures across many generations, that historical significance deserves to be visible too.

Our position: a truly informative overview emerges only when both categories sit side by side. We communicate transparently what counts as what.

Overview

Common thyme (Thymus vulgaris) is a small aromatic subshrub in the mint family (Lamiaceae), native to the Mediterranean region. Its grey-green leaves are used in cooking and herbal preparations. The EMA Committee on Herbal Medicinal Products (HMPC) describes thyme herb as a traditional remedy for productive cough associated with a cold. The monograph does not establish well-established medicinal use or a digestive indication.

Thyme tea is used as a household remedy for colds and cough, as documented in a survey in East Tyrol. Preparations with honey appear in older herbals. Thyme essential oil contains thymol, carvacrol, p-cymene and linalool, among other constituents, with proportions varying by chemotype. Clinical studies mainly concern specific combinations with ivy leaves or primrose root. Their findings cannot be directly transferred to thyme alone or a homemade cup of tea. Thyme tea can itself be sold as a herbal medicine. The specific product and its use matter.

History

Thyme-like herbs appear in ancient texts. Dioscorides describes thymos, including preparations with honey for respiratory complaints, while Pliny mentions thymum for cough. The modern species behind those names are not always clear, so they cannot automatically be equated with common thyme, Thymus vulgaris. Frequently repeated stories about Egyptian embalming, Greek temple incense or dissemination by Roman legions are not adequately documented for this species here.

Early modern European herbals describe thyme as a culinary and medicinal plant. Culpeper’s English herbal lists it for cough and respiratory complaints. A survey in East Tyrol documents thyme tea as a household remedy for colds and cough. Preparations with honey appear in Fuchs and Tabernaemontanus. These individual sources cannot demonstrate continuous regional transmission. The current EMA monograph describes traditional use only for productive cough associated with colds. Older German Commission E monographs list bronchitis and upper respiratory catarrh, among other uses. This does not justify self-treatment of serious respiratory disease.

Mechanism

The essential oil shapes thyme’s aroma and flavour. Its constituents include thymol, carvacrol, p-cymene and linalool. Their proportions vary considerably by chemotype: alongside thymol-rich plants there are linalool-rich and geraniol-rich forms. Oils from the same botanical species can therefore smell different. Thymol often shapes the strong spicy aroma of common garden thyme.

Laboratory and animal studies describe antimicrobial, antispasmodic and cough-related effects of thyme extracts and individual constituents, including experiments on smooth muscle and on thymol and carvacrol. Translation of the tested concentrations and effects to humans depends on the preparation. These findings establish neither antimicrobial treatment with thyme tea nor the contribution of warmth, aroma or honey to perceived relief.

In 2006, Kemmerich and colleagues studied a fixed combination of thyme herb and ivy leaves in 361 adults with acute bronchitis and productive cough. Kemmerich’s 2007 study, also involving 361 adults, tested a different combination: thyme herb and primrose root. In both placebo-controlled trials, coughing fits declined more under the respective combination. These findings apply to the tested medicines. They do not determine the contribution of thyme alone or whether a cup of thyme tea has similar effects.

For thyme herb alone, the EMA classification rests on long-standing use for productive cough associated with colds. The agency considered the available clinical data insufficient for firm conclusions on efficacy. Traditional use includes medicinal thyme tea. Laboratory findings on thyme extracts and constituents such as thymol or carvacrol make some effects plausible, but do not establish treatment of respiratory infection or efficacy of homemade thyme with honey.

Usage

Forms and preparation

For medicinal thyme tea, the EMA specifies one to two grams of comminuted thyme herb in 150 millilitres of boiling water for adults and adolescents aged twelve and over. Follow the leaflet when using a packaged medicinal tea. Infuse covered, then strain. A kitchen sprig or a teaspoon measure cannot reliably be equated with the stated gram amount. For thyme tea with honey, prepare the tea fresh, let it cool to a comfortably warm temperature and stir in a teaspoon of honey to taste. Honey is unsuitable for infants under twelve months. Thyme essential oil does not belong in this kitchen preparation. Medicinal use of the oil requires a product intended for that purpose with its own instructions.

Dosage

For medicinal thyme tea from age twelve, the EMA specifies one to two grams of herb in 150 millilitres of water, three to four times daily, for productive cough associated with a cold. Medicinal thyme tea is not recommended under twelve years. Certain specific extracts have different age limits. This tea dose must not be transferred to children under twelve. For combinations with ivy or primrose root, follow the particular medicine’s dose. These amounts cannot be transferred to arbitrary extracts or essential oil. If the cough worsens or lasts longer than one week, seek medical assessment. Seek help sooner for shortness of breath, fever, or purulent or bloody sputum. Honey has a separate age restriction: infants under twelve months must not receive it. This does not mean that every thyme preparation is suitable from the first birthday.

Safety

Safety profile

Medicinal thyme herb preparations must not be used in people allergic to thyme or other mint-family plants. Stomach complaints and allergic reactions can occur. Thyme essential oil has separate precautions: it can irritate skin and mucous membranes. Use medicinal products intended for the purpose according to their leaflets. Do not mix arbitrary oil drops into tea. The EMA does not recommend oral or cutaneous thyme oil use under 18 years, or bath additives under three years. In children under two years, thyme oil must not be applied to the face, particularly the nasal area, because of the risk of laryngospasm. The EMA does not recommend medicinal thyme preparations, including tea, during pregnancy and breastfeeding because adequate safety data are lacking. Ordinary seasoning amounts in food should be distinguished from medicinal use. Children have preparation-specific age limits; tea use is not recommended under twelve years. Honey must not be given to infants under twelve months because of the botulism risk. Seek medical advice if the cough lasts longer than one week or worsens; seek assessment sooner for shortness of breath, fever, or purulent or bloody sputum.

Look-alikes

Botany

Family

Lamiaceae

Native regions

Mediterranean (native), Western Mediterranean basin, Central Europe (naturalized), Austrian gardens, cultivated worldwide

Harvest window

Herb harvested during flowering in summer; exact timing varies with growing conditions.

Habitat

Sunny, dry, calcareous slopes are the native habitat of thyme. In the garden, thyme wants well-drained, stony, slightly alkaline soil and a south-facing spot; it tolerates dry conditions well and dislikes wet feet. Native to the western Mediterranean basin, naturalised in pockets across central Europe; cultivated worldwide as a culinary and medicinal herb.

Identification & foraging

Aromatic woody perennial subshrub of the mint family, ten to forty centimetres tall, often spreading sideways more than vertically as it ages. Small grey-green narrow leaves with downward-rolled margins, tightly arranged in opposite pairs along thin woody stems. A strong spicy aroma, often shaped by thymol, is released when the leaves are crushed between the fingers. Small white to pale pink or pale purple lipped flowers in short whorled clusters at the tips of the stems. The square stem typical of Lamiaceae is present but not obvious because the stems are thin and quickly turn woody. Flora Helvetica gives a flowering period from May to October for Switzerland.

Similar plants and look-alikes

Unpleasant

Wild thyme (Thymus serpyllum)

Wild thyme (Thymus serpyllum) is a related species, usually low-growing and creeping. Its aroma can differ from garden thyme; a lemon scent is not a reliable identifying feature. The EMA thyme-herb monograph covers Thymus vulgaris and Thymus zygis, not Thymus serpyllum.

FAQs

How do I prepare Thymian-Honig at home?

Prepare thyme tea fresh according to its instructions, strain it and let it cool to a comfortably warm temperature. You can then stir in a teaspoon of honey to taste. Adding honey does not replace medicinal dosing. Honey is unsuitable for infants under twelve months; for children, also follow the age limit of the thyme preparation.

From what age can children have thyme with honey?

Do not give honey to infants under twelve months, including in tea or other foods. It can contain Clostridium botulinum spores and cause infant botulism. Thyme medicines have separate age limits: the EMA describes most thyme herb preparations, including tea, from age twelve. Certain specific extracts are described for children from age four. The product leaflet states whether it is suitable for your child. Seek paediatric or pharmacy advice for younger children with a cough.

Can I swallow drops of thyme essential oil?

Use only a thyme oil medicine intended for oral use and follow its leaflet. An arbitrary aroma bottle is unsuitable. Depending on the preparation, thyme oil medicines are intended for oral use, skin application or as a bath additive, with different doses and age limits. The EMA does not recommend oral or cutaneous use under 18 years, or bath additives under three years. Thyme oil must not be applied to the face, particularly the nasal area, of children under two years because of the risk of laryngospasm. Undiluted oil can irritate skin and mucous membranes. Thyme tea is a different preparation.

What is the difference between garden thyme and wild thyme?

Garden thyme is usually Thymus vulgaris, an upright Mediterranean subshrub. Wild thyme refers to several low-growing thyme species, including Thymus serpyllum. They are related but differ botanically and in constituent composition. A mild or lemony scent alone is insufficient for identification. The EMA monograph for thyme herb specifically covers Thymus vulgaris and Thymus zygis and cannot be transferred indiscriminately to wild thyme.

References

4 sources.

Bernd Kemmerich; Reinhild Eberhardt; Holger Stammer. Efficacy and tolerability of a fluid extract combination of thyme herb and ivy leaves and matched placebo in adults suffering from acute bronchitis with productive cough. A prospective, double-blind, placebo-controlled clinical trial. 2006. doi:10.1055/s-0031-1296767
Bernd Kemmerich. Evaluation of efficacy and tolerability of a fixed combination of dry extracts of thyme herb and primrose root in adults suffering from acute bronchitis with productive cough. A prospective, double-blind, placebo-controlled multicentre clinical trial. 2007. doi:10.1055/s-0031-1296656
European Medicines Agency, Committee on Herbal Medicinal Products (HMPC). Community herbal monograph on Thymus vulgaris L. and Thymus zygis L., herba. 2013. Source
European Medicines Agency, Committee on Herbal Medicinal Products (HMPC). European Union herbal monograph on Thymus vulgaris L., Thymus zygis L., aetheroleum, Revision 1. 2020. Source

Legal notice: The depiction of historical significance and traditional use is context within our encyclopedia and not a health claim for any product, not a treatment promise, and not a substitute for medical advice. What may be stated on product labels, product pages, or in advertising is governed by the applicable legal requirements.