Lose weight with a smaller operation.

MagDI™ uses two small magnets so you feel full sooner. Most go home the next day.

4.8 on Trustpilot · 461 reviews

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How does it work?

Free assessment with Dr Loy

Dr John Loy

Ireland's only MagDI™-certified surgeonAlmost 3,000 weight loss operations

So we can call you about your free assessment.

  • No obligation
  • Online or in Dublin

Your details stay private. Privacy Policy

No pressure

What Happens Next

You don't need to know anything yet. That's what the free assessment is for.

  1. We call you

    A friendly patient coordinator calls you, usually within one working day. They answer your questions and find a time that suits you. Sent at the weekend? We'll call you on the next working day.

  2. You meet Dr Loy, for free

    Online or in Dublin, with no long waiting list. He listens to your story and explains all your options.

  3. You decide, in your own time

    You get a written plan and one clear price. There's no obligation at any point.

“Meeting Dr Loy to discuss the best surgery for me, I felt it was the first time in my life I was genuinely being listened to and not just blamed or judged for being overweight.”

Sarah K., Trustpilot review, April 2026
Sound familiar?

It's Not About Willpower

  • I've tried every diet. Slimming World, Weight Watchers, all of them.
  • The weight comes off, then it comes back.
  • I'm hungry all the time.
  • I worry about my health: my blood sugar, my blood pressure, my joints.
  • I just want to feel like myself again.

You're not doing it wrong

When you lose weight with a diet, your body fights back. It makes you hungrier, so the weight comes back. That's how the body works. It's not a lack of willpower.

MagDI™ works with your body instead. It changes the signals from your gut, so you feel full sooner and want less.

What MagDI™ Can Do For You

  • Feel full sooner

    MagDI™ raises your body's own fullness hormone and lowers the ones that make you hungry. Eating less feels easier.

  • Weight loss that lasts

    It works the same way as a gastric bypass, an operation surgeons have used for decades.

  • Help with blood sugar

    In the first study, people with type 2 diabetes saw their average blood sugar (HbA1c) drop from 8.2% to 6.6% in a year.

  • Nothing left inside you

    The two magnets pass out naturally, usually within two to three weeks. There's no implant to look after.

Think what that could mean for you: more energy, clothes that fit, keeping up with the kids, and less worry about your health.

Results vary from person to person.

In plain words

How MagDI™ Works

Drawing of the gut, with the two small magnets meeting between two parts of it
  1. While you're asleep

    Dr Loy places two small magnets in your gut. They gently hold two parts of it together.

  2. Over two to three weeks

    Your body makes a new, shorter path for food between them. Then the magnets pass out naturally.

  3. From then on

    Some of your food takes the shorter path. You feel full sooner and less hungry.

Feeling nervous?

Worried About An Operation? That's Normal.

  • Looked after while you sleep

    It's keyhole surgery, through a few small cuts. An experienced anaesthetic team is with you the whole time.

  • Back on your feet quickly

    Usually one night in hospital, and back at a desk job in one to two weeks.

  • Used since 2021

    Around 40 centres in the US already offer MagDI™. It is authorised in the US, Canada and Europe.

Every operation has some risks. Dr Loy will explain them clearly and answer all your questions.

Dr John Loy, Consultant Bariatric and Metabolic Surgeon at Auralia
Who looks after you

Meet Dr Loy, Your Surgeon From Start To Finish

Dr John Loy, Consultant Bariatric and Metabolic Surgeon, Head of Bariatric Surgery at Auralia

You meet Dr Loy at your assessment. He does your operation, and he sees you at your check-ups afterwards. He has done almost 3,000 weight loss operations. He is currently the only surgeon in Ireland certified to do MagDI™, and Auralia is the only hospital here that offers it.

  • Fellow, Royal College of Surgeons
  • MagDI™ certified

Care that stays in Ireland

  • A dietitian and the Auralia weight loss app
  • Regular check-ins after your operation
  • A 24/7 surgical emergency line
  • Auralia Private Hospital, Dublin: Ireland's first internationally accredited private hospital

Worried at 2am after your operation? You can call us, day or night.

25 years caring for patients in Ireland40,000+ patients

What People Say About Meeting Dr Loy

“He took the time to explain everything clearly and made sure I felt comfortable every step of the way.”

Miroslav P., Trustpilot review, November 2025

“The pre-op meeting was informative & to the point, Dr Loy answered all my questions very efficiently & reassured me that Auralia was a good option for me.”

Donna Marie L., Trustpilot review, May 2026

Your Questions, Answered

Not Sure Yet? That's What The Free Assessment Is For.

A relaxed, one-to-one talk with Dr Loy, in Dublin or online. No cost and no pressure.