Hypnotherapy is very successful in supporting weight loss, and for all the right reasons:

It can motivate for daily exercise.

Change eating habits.

Remove cravings.

Reorient the body and mind to enjoy healthy food.

Cultivate and support motivation.

Recognize and resolve the traumas or issues that triggered the weight gain in the first place.

To be fully successful with large weight loss, plan for 15 sessions spaced over a half year.