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Coleus

Húng chanh, Coleus forskohlii

Plectranthus barbatus

Forskohlii, Coleus barbatus, Coleus forskohlii

Lamiaceae · Rễ · Roots · Steam-distilled or CO2 extraction

Botanical illustration of Plectranthus barbatus; roots used to extract Coleus essential oil
Coleus essential oil, extracted from the roots of Plectranthus barbatus. Botanical illustration, Lê Mai Library.

Safety

No specific contraindications in available data.

No information on dermal reactions or acute toxicity.

Bornyl acetate, one of the major constituents, is non-toxic.

β-Sesquiphellandrene and γ-eudesmol display antitumoral properties in research.


Usage guidelines

Sensitization risk
No data available

Chemistry

Volatile constituents
Bornyl acetate15.0 %
β-Sesquiphellandrene13.2 %
γ-Eudesmol12.5 %
3-Decanone7.0 %
α-Gurjunene5.0 %
α-Selinene4.4 %
Cedran-8-ol2.8 %
γ-Elemene2.5 %
Isolongifolene2.5 %
(Z)-α-Bergamotene2.4 %
Camphene2.2 %
α-Pinene1.9 %
Bicyclogermacrene1.5 %
(Z)-Calamenene1.5 %
β-Pinene1.5 %

Botanical source

Plectranthus barbatus (synonym Coleus forskohlii) is a perennial herb of India and Sri Lanka. The root contains forskolin, a medically-researched compound with pharmacological activity.

The US Sabinsa corporation holds patent US Patent #6,607,712 covering CO2 extraction of the plant, describing methods to produce antimicrobial compositions for acne and dental caries prevention.

Family Lamiaceae. The sustainability of the wild-grown plant in India is threatened by harvesting for medicinal use.


Notes

Essential oil (distilled) production is limited, the plant is mainly cultivated for forskolin extraction rather than aromatic oil.