Sorry if I didnt explain properly - I wasnt really comparing a cats liver to human liver....I was just passing comment on the toxic effect tea tree oil or any other essential oil can have on cats with their sensitive livers (you mentioned cats in your earlier post). I wasnt suggesting it would affect your liver either although its good you get those checks. Its obviously having some positive effect on you judging by your reaction. So long as you feel ok about taking it thats all that counts but some of the information you read about taking tea tree oil internally can be worrying. Hope you feel some relief before too long.