Cassia Essential Oil – Possible Skin Issues:
Maximum dermal use level: 0.05%
The International Fragrance Association (IFRA) recommends that Cinnamaldehyde (the chief constituent of Cassia oil) be limited to 0.05% (about 1 drops per 3 ounces of any other carrier oils) for leave-on products like ointments, creams, and lotions. There is no restriction for body washes, shampoos, soaps, and other wash-off products because the oil does not remain on the skin.
The adverse skin reactions of Cassia or the Chinese Cinnamon oil are dermal irritation, mild to severe skin sensitization, irritation of the mucous membrane and dermatitis. Cassia oil is said to exhibit no phototoxic effects but is emmenagogue in nature and might cause contraction of the uterine muscles, which is hazardous to the wellness of the fetus and the pregnant women.
The key chemical constituents that are responsible for the possible skin and other undesirable health issues of Cassia oil are cinnamaldehyde, cinnamyl acetate, cinnamic acid and cinnamyl alcohol. These components have been studied for causing acute and subchronic toxicity.
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Studies state that cinnamaldehyde, cinnamic acid and cinnamyl alcohol may cause allergic reactions, irritation, sensitization and dermatitis when the skin is in contact with products like liniments, mouthwashes, toothpastes and creams.
Cassia oil may provoke debility, itching, irritation, insomnia, and depression in some people. This mainly occurs when the use of Cinnamaldehyde exceeds the maximum safe level of usage. The highest recommended level by the International Fragrance Association (IFRA) for Cinnamaldehyde is 0.05% for most leave-on products.
When used in vapor therapy and topical application beyond the recommended usage level, Ccnnamaldehyde, cinnamyl acetate, cinnamic acid and cinnamyl alcohol are said to contribute to the irritation of mucous membrane and are accounted for hepatotoxicity (toxic, irritant and might cause damage to the liver), mutagenic (alteration in the structure of DNA), reproductive toxicity (research supporting significant fall in the number of nuclei and changes in the allotment of embryos in pregnant mice) and restrain platelet aggregation, a vital part of the blotting clotting process.
Undiluted or concentrated Cassia oil have been shown to cause severe irritation in rabbits in certain studies and few other studies involving consecutive patients with dermatitis, few people were sensitive to 2% Cassia oil on patch testing.
Always ensure to dilute Cassia oil in appropriate carrier oils before topical use and never ingest essential oil as they may be toxic to the system.
Reference Links Substantiating Possible Skin Issues of Cassia Oil:
- Essential Oil Safety: A Guide for Health Care Professionals By Robert Tisserand, Rodney Young
- Leung’s Encyclopedia of Common Natural Ingredients, used in Food, Drugs and Cosmetics by Ikhlas A. Khan and Ehab A. Abourashed.
- A toxicologic and dermatologic assessment of cinnamyl alcohol, cinnamaldehyde and cinnamic acid when used as fragrance ingredients by The RIFM expert panel, published in the Food and Chemical Toxicology
- Cassia bark oil: The Chinese Cinnamon oil by Mercola.com
- Fragrance material review on cinnamyl acetate by S.P. Bhatia, G.A. Wellington, J. Cocchiara, J. Lalko, C.S. Letizia, A.M. Api, Research Institute for Fragrance Materials, Inc., Manheimer Fragrances, Teterboro NJ, USA, published in Food and Chemical Toxicology Review and Science Direct
Thought for the day:
The art of healing comes from nature, not from the physician. Therefore the physician must start from nature, with an open mind. -Paracelsus
- Cinnamon and Cassia: The Genus Cinnamomum (Medicinal and Aromatic Plants – Industrial Profiles) from CRC Press
- Ayurveda: Life, Health, and Longevity by Robert E. Svoboda B.A.M.S.
- The Complete Guide to Natural Cures: Effective Holistic Treatments for Everything from Allergies to Wrinkles (Lynn Sonberg Books) by Debora Yost
- The Encyclopedia of Aphrodisiacs: Psychoactive Substances for Use in Sexual Practices by Christian Rätsch, Claudia Müller-Ebeling
- Herbal Medicine From the Heart of the Earth by Sharol Marie Tilgner
- Essential Oil Safety, Second Edition by Robert Tisserand and Rodney Young
- Cinnamomum cassia by Wikipedia
- Vitamins offer hope for Alzheimer’s by Dr. Mercola
- Can Cinnamon help you control your diabetes by Amy Campbell published in Diabetes Self-Management.com
- Antimicrobial activities of cinnamon oil and Cinnamaldehyde from the Chinese medicinal herb Cinnamomum cassia Blume by Ooi LS, Li Y, Kam SL, Wang H, Wong EY, Ooi VE published in PubMed