Review title is Seriously Questioning Whether This is a Genuine Product [SEP] I have been using Paul Mitchell Tea Tree Lemon Sage Thickening Shampoo and Conditioner for a couple of years.  It has always performed as expected and made my thin, fine hair more manageable and a little fuller feeling.  The last time I ordered it, however, it did not perform or even smell the same as previous purchases.  My hair did not feel clean after shampooing, or more manageable.  In fact, by day two it looked a little greasy.  I subsequently developed dermatitis around my hairline and down my neck to the point where I had to consult a dermatologist.  She suggested it could be my shampoo and told me to stop using this product.  My dermatitis went away and after about a month, I tried using the Paul Mitchell Tea Tree Lemon Sage Shampoo and Conditioner again.  My dermatitis returned almost immediately.  While I suppose I could have developed an allergy to a product I have been using for a couple of years, I question whether this product sold on Amazon is genuine.  I will not order any more cosmetic products from Amazon due to their self-admitted counterfeit problem. Caveat Emptor.