The best shampoo in the world for adult men (I'm 30) who started to notice that their hair is starting to go away. Granted, this doesn't solve the issue but it gives volume and makes your hair stronger. My barber recommended this when he started to note that my greasy hair and scalp were starting to crack for drying up and since then I've been using it with exceptional results.
Some key tips:
Don't use it every day, mix it up with another regular shampoo day to day. One day this one, one day the other.
This works for hair that tends to be greasy so if you have a dry hear DONT BUY THIS
When you apply it, do so massaging your scalp with circular motions and most importantly... DONT RINSE IMMEDIATELY, hold it on for a few minutes AGAIN DONT RINSE IMMEDIATELY. Then when you rinse it, don't rinse till the final spot, just let the water do its thing, no hands. The idea is that you keep a thin coat of this shampoo with you so it keeps strengthening your hair.
If you do what I said, you'll notice results in a week or so. Trust me, this is the best advice a friend could have given to me.
Plus, get the 1000ML, buy a pump and you are set. Don't waste your money with the overly priced small bottle.