Tea tree oil is distilled from the leaves of an Australian shrub, and it is the single most useful antifungal in this index. Its active compound, terpinen-4-ol, is effective against the dermatophytes responsible for athlete's foot and against the fungi that discolour and thicken toenails.
Its range across this book reflects that. Athlete's foot, toenail fungus, plantar warts, cracked heels, dry feet — the common thread is that all of them either are an infection or are an opening for one. Tea tree handles the infection while the skin repairs.
It is strong. The smell is medicinal and unmistakable, and the strength that makes it effective is the same strength that makes dilution non-negotiable.


