Download Your Weight Loss Program Now

6 Audio Sessions (you can download to any device)
PLUS our “How to” Guide
PLUS access to a Tutorial Video

50% off NOW  Was €99  JUST €49 


Very Special Offer

 For a limited time only secure your download  for the very special price of 

50% off NOW  Was €99  JUST €49 

Download Your Weight Loss Program Now

Sharon Gill shed a massive five stone in less than a year

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50% off NOW  Was €99  JUST €49 

Dont Miss Out

Shane Manning loss 5.5 stone in D4 Clinic after one clinic session.

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50% off NOW  Was €99  JUST €49 

Instant Download

It’s your turn to let award winning psychologist and weight loss hypnotist Jason O’Callaghan train your subconscious mind to help you get the motivation to change you eating and exercise habits.


Proven Results

Jason has personally lost over 4 stone using hypnosis and now guides others to lose weight. No matter if it’s just a few pounds or a few stone Jason’s methods have helped his clients lose between 2 and 8 stone in recent years.

Hypnosis on the go

Download the files to your devices and take your sessions with you.

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

Trial The Booster Session Free Now

by Jason O'Callaghan


For a limited time only



What Our Customers Are Saying

Don’t just take it from us, let our customers do the talking!

Dear Jason,

Many thanks for your help at D4 clinic. I have now lost over 3 stone and feel so good. This picture of me is in my first pair of size 12 jeans in over 20 years. It is just amazing how it has worked. I now love my daily walk.Thanks again for all your help.
I would have no hesitation in recommending the D4 CLINIC to my friends and colleagues.
Breda Keating

I have lost over 3 stone with thanks to the hypnotherapy gastric band operation, I just wanted to thank you for all your help. I feel like a different person now. My diet and lifestyle has changed and I am a much happier person. Thanks again.

Anne C

Just a quick email to thank you for the recent sessions, I did four in total and found with each one I was able to relax more and more. My weight loss is going well and I am down 44 lbs in 3 months. Exercise is going well and food intake is right down. I still have a few more stone to go but the road ahead is looking good. I will be in touch to book another session when I get back from my break.

Maureen N


Our success stories keep on growing….



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