Hi Lilly,

I do not have a high client base that is in need of this kind of treatment, but I have researched it a long time ago, then used it to treat them, and have seen great results.  Try Lotus Oil.  It is an herbal oil that is used to make hair stronger and look thicker without greasyness.  You can get it at:  www.herbalsalon.com  It will take several weeks to notice a difference.  If it does not come with the instructions, massage it in every night and leave in until next day.  Use herbal shampoo's and light weight conditioners during the process.  Best of Luck to you:)