I just tried Just for Men. I have a moderate to low amount of grays on the side of my head and very little anywhere else. I was attracted to try Just for Men because it stated that it "targets only gray for a natural look." This is exactly what I wanted seeing as I only have a grays on the side and did not want to change my overall hair color. Unfortunately, this was not the case. Not only did the shampoo dye my hair in areas I didn't want it to, it did not get the gray out. I am extremely disappointed with this product. I have to wait over a month before my natural hair color returns and again, the grays remain. I followed the instructions and bought a hair color that is slightly lighter than mine. Still, it did the opposite of what it was supposed to - targeted all areas other than gray. If you have a good amount of natural color and a small amount of gray that you want to color, I would highly advise not using this product.