[Gracella]

Ja, ja, fant noe på Wikipedia:
http://en.wikipedia.org/wiki/Tea_tree_oil

Utdrag:
According to the American Cancer Society: "Tea tree oil is toxic when swallowed. It has been reported to cause drowsiness, confusion, hallucinations, coma, unsteadiness, weakness, vomiting, diarrhea, stomach upset, blood cell abnormalities, and severe rashes. It should be kept away from pets and children."
A small number of people experience allergic contact dermatitis as a reaction to dermal contact with tea tree oil. In an Italian study of 725 consecutive patients, patients were patch tested with undiluted, 1% and 0.1% tea tree oil. For undiluted tea tree oil, nearly 6% of the patients observed positive reactions of skin irritation. Only 1 of 725 patients observed a positive reaction of skin irritation with the 1% dilution. None of the 725 patients observed adverse reactions with the 0.1% dilution. Allergic reactions may be due to the various oxidation products that are formed by exposure of the oil to light and/or air.
External application of tea tree oil undiluted and/or at inappropriate high doses has been associated with toxicity, including death, in cats and other animals due to ingestion during grooming.

Tea tree oil may cause hearing loss when used in the ears.]

Litt mer her::
http://www.ediesbookstore.com/Articl...a-Tree-Oil.php

Det som er allergifremkallende, er vel en terpentinkomponent i TTO'en.

Men ellers er det en fantastisk olje som (utblandet) kan brukes mot en masse plager... .