Yes, I am using Paul Mitchell Tea Tree Special: shampoo, conditioner and combo leave in conditioner/body lotion. I have since seen many other TTO products. Unfortunately, they don’t indicate the percentage of TTO. Our only gauge is where the TTO falls on the list of ingredients. And as you likely saw in my prior comments, I am adding 3 ml ( little more than half teaspoon) per 10 oz of all the above TTO products to strengthen the concentration.