The D4 Lifestyle and Wellness Clinic

Weight LossStop SmokingTherapyCounsellingPsychologyClinical Hypnotherapy

Our Services

Buy Sessions from €49

  • Weight Loss
  • Stop Smoking
  • Fear of Flying
  • Anxiety/Stress
  • Public Speaking
  • Instant Confidence
  • Insomnia
  • Reduce Alcohol

Try Hypnosis NOW


Listen to a Free Relaxation Session

*Not to be used when driving or using machinery. Not suitable for those on psychiatric medicine or those with epilepsy.

Try Hypnosis NOW..


Listen to a Free Relaxation Session

*Not to be used when driving or using machinery. Not suitable for those on psychiatric medicine or those with epilepsy.

Ireland’s Highest Trained Therapists

The only hypnotherapy clinic in Ireland with Masters trained Trinity College Psychologists.

We offer personal one to one sessions or group sessions in counselling, psychology, mindfulness and clinical hypnotherapy.

Award Winning Psychological Mindfulness Hypnotherapy Clinic

with proven results for weight loss, stop smoking, eating disorders, overcoming fears/phobias, improving confidence and reducing alcohol consumption, reducing stress/anxiety plus many more day to day issues.

Member of The Psychological Society of Ireland (PSI)

Hurry, our special offer is about to expire*

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*The special offer prices for our Stop Smoking and Weight Loss programs finish on the 1st September.
From September 1st our Stop Smoking Program will be €497 for unlimited sessions and the Weight Loss Program will be €497 for unlimited sessions for life.

D4 Clinic founder Jason O’Callaghan will personally work with you for each session and has lost over 4 stone using our methods.

Our Success Stories

* Disclaimer: Willpower may be required and individual results may vary.

* Disclaimer: Willpower may be required and individual results may vary.

* Disclaimer: Willpower may be required and individual results may vary.

* Disclaimer: Willpower may be required and individual results may vary.

‘You are a hero’: Man’s Vegas honeymoon is saved after Irish passenger hypnotises him in London airport

'You are a hero': Man’s Vegas honeymoon is saved after Irish passenger hypnotises him in London airport Irish Independent 19th Oct 2016 Newlywed gets to go on honeymoon Newlywed bumps into Jason in the airport Fear of…
Read More

Overcome Fears and Phobias

Eating Disorders

Sign up & Get The D4 Clinics Top Weight Loss Tips Video

Hypnosis cured me of chips and waffles diet

Hypnosis cured me of chips and waffles diet An article on the use of Hypnotherapy for weight loss. Hypnosis cured me of chips and waffles…
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Man who ONLY ate spaghetti hoops for 30 years reveals remarkable way he quit

Irish man eats spaghetti hoops for dinner every day for 30 years because even thinking of other foods ‘make him gag’ Irish Mirror 2nd June 2017 Man who ONLY ate spaghetti hoops for 30 years reveals remarkable way he quit Daily Star 2nd Jun…
Read More

Our successes have been widely reported in press

Hypnosis cured me of chips and waffles diet

Hypnosis cured me of chips and waffles diet An article on the use of Hypnotherapy for weight loss. Hypnosis cured me of chips and waffles…

McGregor v Mayweather

Psychologist Promises Conor McGregor Hypnosis Success With Mayweather Fight A Dublin psychologist says hypnosis can help McGregor beat Mayweather Hypnotherapist says he has the power to give Conor McGregor victory over Floyd Mayweather Psychologist Promises...

We tried hypnosis to kick our sugar addiction but it did so much more

We tried hypnosis to kick our sugar addiction but it did so much…

Want To Lose Weight In 2017 – Then Stop Exercising

Want To Lose Weight In 2017 – Then Stop…

Change your relationships in 2017 with hypnotherapy

Change your relationships in 2017 with…

Help by hypnosis

Help by…

‘You are a hero’: Man’s Vegas honeymoon is saved after Irish passenger hypnotises him in London airport

'You are a hero': Man’s Vegas honeymoon is saved after Irish passenger hypnotises him in London airport Irish Independent 19th Oct 2016 Newlywed gets to go on honeymoon Newlywed bumps into Jason in the airport Fear of…

Man who ONLY ate spaghetti hoops for 30 years reveals remarkable way he quit

Irish man eats spaghetti hoops for dinner every day for 30 years because even thinking of other foods ‘make him gag’ Irish Mirror 2nd June 2017 Man who ONLY ate spaghetti hoops for 30 years reveals remarkable way he quit Daily Star 2nd Jun…

Call us right now on 01 6688217 for a free phone consultation