Hypnosis has been shown to be effective in helping some people quit smoking, but it is not a guaranteed or universal solution. The effectiveness of hypnosis for smoking cessation may vary depending on the individual and the skill of the hypnotherapist. Some studies have found that hypnosis can be more effective than other smoking cessation methods, such as nicotine replacement therapy or cognitive-behavioral therapy, while other studies have found no significant difference between hypnosis and other methods. It is important to note that hypnosis is not a standalone treatment and should be used in conjunction with other smoking cessation strategies, such as counseling, medication, or support groups, for best results.