I was diagnosed with psoriasis many years ago and struggled for a long time to find products that work well and are affordable. On a whim, I tried T/Gel not expecting the best results from an over-the-counter product, but this turned out to be the best I have tried so far. This shampoo contains 1 percent coal tar, which is apparently some kind of miracle worker, because this stuff really does help keep my scalp looking clear. Also, unlike my prescription shampoo, T/Gel smells great and leaves my hair feeling soft. I highly recommend this product to anyone looking for a great medicated shampoo you can find anywhere, and at a great price.