We believe that hypnosis will be optimally effective when the patient is highly motivated to overcome a problem and when the hypnotherapist is well trained in both hypnosis and in general considerations relating to the treatment of the particular problem. Some individuals seem to have higher native hypnotic talent and capacity that may allow them to benefit more readily from hypnosis.
It is used for a wide variety of applications, and studies into its efficacy are often of poor quality[2] which makes it difficult to determine efficacy. Several recent meta-analyses and systematic reviews of the literature on various conditions have concluded that the efficacy of hypnotherapy is "not verified",[3] that there is no evidence[4][5] or insufficient evidence[6][7] for efficacy.