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Monographs of essential oils that have caused contact allergy / allergic contact dermatitis
Published in Anton C. de Groot, Monographs in Contact Allergy, 2021
Thuja occidentalis L. is an evergreen coniferous tree which grows up to 25 meter tall and one meter in diameter. It is native to Canada and the USA and is cultivated in China, Korea, Russia (European part), and Europe, often for ornamental purposes (2,12). One of its common names is ‘Arborvitae’, which is particularly used in the horticultural trade in the United States and is Latin for ‘tree of life’ - due to the supposed medicinal properties of the sap, bark and twigs. In folk medicine, Thuja occidentalis has been used to treat various diseases (2). It has a myriad of applications in Western herbal medicine, traditional Chinese medicine, homeopathy and aromatherapy. The pharmaceutical, pharmacological and clinical properties of Thuja occidentalis (products) have been reviewed (3,4).
Non-interventional observational study broadens positive benefit-risk assessment of an immunomodulating herbal remedy in the common cold
Published in Current Medical Research and Opinion, 2019
Hans-Heinrich Henneicke-von Zepelin, Petra Nicken, Belal Naser, Jennifer-Christin Kuchernig, Nicole Brien, Annette Holtdirk, Jörg Schnitker, Klaus-Ulrich Nolte
Popular herbal remedies with immunomodulating properties include preparations of Echinacea spp., Thuja occidentalis and Baptisia tinctoria. The effects of Echinacea spp. on the immune system have been demonstrated by a series of experiments5. These remedies are used to prevent or treat colds. The mechanism of action is associated with its ability to stimulate the innate immune response5–9. Alkamides, glycoproteins, polysaccharides and caffeic acid derivatives are the main active ingredients in echinacea10. Insufficiency of clinical evidence is criticized due to the variety of dosages and echinacea preparations10–12. Each preparation should be judged individually13.