Do not Ingest Tea Tree Oil – It May Have Serious Side Effects
Tea tree oil should not be taken internally or ingested. It can be safely used orally, for example in mouthwashes and toothpastes, as long as it is spat out and not swallowed.
If the tea tree oil is consumed, the side effects can be very dangerous and toxic. Swallowing even a tiny amount can cause complications.
In minor cases, it may cause light weakness, dizziness, and confusion, as well as headache, muscle weakness, abdominal pain, diarrhea, drowsiness and rashes.
In more extreme cases it may provoke blood cell abnormalities, hallucinations and even induce coma. This is true for humans as well as for animals.