I have been taking tea tree oil internally (by mouth) for 5 months off and on. One week on, one week off. I have put 15 drops in a capsule, and swallow with a full glass of water. I got this from Rosemary Gladstar's book about herbs, and read that a woman tried this as a last resort when nothing else would work for her vaginal yeast infections. But I have not been able to find any info on any health risks of taking tea tree oil internally. I have also used it on someone that had a bad toenail fungal infection topically, and it did clear the nails in about two months. It has been the only thing that helped my irritable bowl syndrome (internally). I now believe that i had yeast throughout my whole body. I stay on a diet of fish and vegetables. Eat one kind of bread found at the health food store called Ezekiel 4/9 or 9/4. No dairy or sugar. No fruit except one tart Granny Smith apple a day, and Do a daily Colon Cleanse
in a capsule form called Experience. I am drinking lots of water. I paid a Chinese herbal doctor a lot of money for this knowledge minus the tea tree oil. Also, Emu oil helps areas of sensitive skin that are raw from yeast especially the genital area. As for a vaginal yeast infection. I haven't had any until recently when I strayed from my diet. I'll use an herbal capsule from the Chinese herbal doc.
good luck all,