Ok I've decided to give this a 6 month experiment where I would apply peppermint on my scalp everyday for the duration of the experiment. There are a few things which concern me. I've read that pure peppermint oil is toxic. Is this true? if so can it cause me harm if I used it everyday? I don't wanna use a carrier oil since I can't use it everyday. I think maybe if I buy some Aloe Vera Gel and put a few drops of Peppermint in it and apply it everyday, that could work. Need advice. Are all essential oils toxic / dangerous to use frequently?