Hair By Ditter is a leave in treatment that can be used daily. It's not a must, only a plus. Remember, it doesn't need to be added to your hair, only your scalp. I personally massage it into my scalp, put on a shower cap and wear it for a few hours around the house. I then wash it out with a shampoo of my choice. You don't have to use a seperate shampoo, but I do because of the different oils used in the treatment. I always worry about my hair appearing oily. My husband doesn't rinse his out and it doesn't make his hair oily. It also obliterated his dandruff in two days. I, on the other hand, do not have dandruff, and my hair is a different texture. So, it's really up to the consumer. As I said, it does not have to be used more than once a week, but the more you use it, the faster it works. The product does contain some peppermint oil, so be sure not to get it in your eyes. 
 
Happy hair growing