Do you think that hypnosis works?

I know someone who is "specialized" (for lack of a better word) in hypnotizing people...I've heard it used for people with depression and other mental health issues and also for people trying to lose weight. Do you think if I got "hypnotized" to not be so obsessed with food and to love exercise and to not give up all the time then I'd be more successful with weight loss? I'm desperate