Love this product! I found it because I was looking for natural soaps to use in my tiny house which will have a composting toilet and no blackwater. The graywater (from sinks, shower, washing machine) needs to be non-toxic without any treatment. Also, any products I use need to be unscented, or I'll get headaches. I've been using this shampoo (and the conditioner and soapnuts laundry "soap") for 2-3 years now and couldn't be more pleased. The shampoo leaves my hair in excellent condition and I don't reek of perfume! It only takes a little bit, and I wash my hair once or twice a week; it never looks greasy.