Hypnotherapy uses hypnosis to put people into a hypnagogic state of consciousness. 

This is the state of consciousness right before one falls asleep, every one naturally enters this state  everyday.

In hypnosis the brain has greater ability for change, the things you want to change about yourself can be accomplish easily.

This is why hypnotherapy is so effective.

Hypnotherapy:          93% success rate after 6 sessions

Behavior Therapy:    72% success rate after 22 sessions

Psychotherapy:         38% success rate after 600 sessions

(Psychotherapy: Theory Research and Practice)

Hypnosis is the most effective method to quit  Smoking 

(How One in Five Give Up Smoking)

For weight loss, those who had hypnotherapy lost on average more than 30 times more weight than those who did not.

 (Hypnotherapy in weight loss treatment)

Here are several links, for those who want to investigate further:

NHS (United Kingdom National Health Service)

Hypnotherapy Statistics (Career Accelerators)

What Happens Inside the Brain? (Elite Daily)

How Hypnosis Works (Medical News Today)

Hypnotherapy or Psychotherapy (Good Therapy)

How Does Hypnotherapy Work on Phobias (Bustle)

Flying Phobia (Mind Body Green)

Women's Testimonies How Hypnotherapy Works for Phobia (Womens' Health)

Academic Literature:

Hypnosis in the Treatment of Phobias: A Review of the Literature

Hypnotherapy in Severe Irritable Bowel Syndrome: Further Experience

Hypnotherapy for Smoking Cessation (Revie


International Handbook of Clinical Hypnosis