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Cinnamon leaf

Quế (lá)

Cinnamomum verum

Cinnamomum zeylanicum

Lauraceae · Lá · Leaves · Steam-distilled

Botanical illustration of Cinnamomum verum; leaves used to extract Cinnamon leaf essential oil
Cinnamon leaf essential oil, extracted from the leaves of Cinnamomum verum. Botanical illustration, Lê Mai Library.

Safety

Skin sensitization · Drug interaction

Drug interactions. May inhibit blood clotting. May contain safrole. Moderate risk of skin sensitization. Low risk of mucous membrane irritation.

Oral: pethidine, MAOIs, SSRIs, anticoagulant medication, before major surgery, peptic ulcer, hemophilia.

Maximum adult oral dose 175 mg daily.

Maximum dermal use level 0.6 percent based on 87 percent eugenol and a dermal limit of 0.5 percent.

Cinnamon leaf oil contains more eugenol than cinnamaldehyde, distinct safety profile from cinnamon bark.

Occupational ACD has been reported, some through airborne contact.


Usage guidelines

Maximum dermal level
0.6 percent
Max adult oral dose
175 mg daily
Dermal basis
Eugenol 87 percent

Chemistry

Volatile constituents
Eugenol68.6 – 87.0 %
Eugenyl acetate1.0 – 8.1 %
Linalool2.0 – 5.0 %
(E)-Cinnamyl acetate0.8 – 4.6 %
Benzyl benzoatetr – 4.1 %
β-Caryophyllene1.9 – 3.7 %
(E)-Cinnamaldehyde0.6 – 1.1 %
Safrole0 – 1.0 %
Cinnamyl alcohol0 – 0.6 %

Botanical source

Same tree as cinnamon bark, Cinnamomum verum, but the oil is distilled from leaves. Eugenol content is 4 to 8 times higher than bark oil.

Leaf oil is significantly cheaper than bark. In perfumery, leaf oil is often blended in as a substitute for bark when cost-reducing.

Family Lauraceae.


Quality

May be adulterated by addition of clove fractions, eugenol or cinnamic aldehyde.