I want to know about mesotherapy for hair and body contouring?

Little evidence. I'm not a big fan of mesotherapy, and am not aware of any significant well done study, published in a peer-reviewed journal, that documents its safety and effectiveness. I don't recommend it to my patients. There are reports of complications. See http://www.Usatoday.Com/news/health/2004-08-04-mesotherapy_x.Htm & http://www.Livestrong.Com/article/234119-complications-of-mesotherapy/.