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In this weeks episode of Pushing the Limits I interview the esteemed Associate Professor Edmund Leung. A gastro enterologist and surgeon.

What you will learn in this episode:

  • What is gastroenterology

  • How the study of the microbiome intersects with the gastrointestinal surgery.

  • How can we support the health of our digestive system

  • The definitions of common ailments from IBD to Crohns to Coeliac

  • A deep dive in Lipopolysaccharides (LPS) and their impact on the health as a whole.

  • Leaky gut, zonulin, Secretory IgA, SIBO

  • The impact of the gallbladder on the health of the gut

  • The impact of the gut on mood and behavior

  • The function of Butyrate

  • The differences between a colonoscopy and a Colonography CT and the pros and cons

  • Screening for cancer

  • The pancreas and it's role

Our gut it the seat of much of our immune system and understanding your intestinal system and how to improve your health through this lens is crucial to anyone wanting to optimise their longevity and slow ageing.


Associate Professor Edmund Leung - General Surgeon

Qualifications: MB BS London; CCT (UK) (Gen Surg); DMedSci (Immunology); JAG (Endoscopy); FRCS (Gen surg); FEBS (Oncology)

Edmund came to New Plymouth with his family just before the Covid pandemic from UK. He had been a senior lecturer and consultant gastrointestinal surgeon in UK for many years. Ed graduated medical school in London in the late 1990s and spent his surgical career in middle England, where he obtained his surgical fellowship and research doctorate in bowel cancer. At the end of Ed's fellowship, Ed spent some time in Basingstoke, UK, with Professor Bill Heald and Professor Brendan Moran further subspecialising within the fields of pelvic cancer.

Outside Ed's clinical duties, he is an active Surgical Oncology examiner for European Board of Surgery and a training convenor for the Royal College of Surgeons with now over 80 peer-reviewed publications. Ed has peer-reviewed over 300 medical journal manuscripts. Furthermore, Ed is also the International Ambassador for the British Association of Surgical Oncology, actively promoting better training, delivery of care and public awareness on cancer surgery. In 2019, Edmund was the winner of the British Silver Scalpel Surgeon of the Year.


  • Interventional and diagnostic gastroscopy and colonoscopy

  • Laparoscopic cholecystectomy

  • Hernia (Laparoscopic or open)

  • Skin tumours

  • Abdominal pain and adhesions

  • Irritable bowel syndrome

  • Haemorrhoidal surgery and other anal conditions: fistulae, fissures, proctalgia

  • Pilonidal Surgery: Simple excision to Limberg flap

  • Major open and laparoscopic Surgery: Cancer, Diverticular disease and Inflammatory Bowel Disease

  • TAMIS (Transanal minimal invasive Surgery)

  • Pelvic floor disorders: obstructed defaecation, functional incontinence/constipation and prolapse

  • Abdominal and groin hernia repair including parastomal hernia repair (open and laparoscopic)

Title or Designation

General Surgeon

Post-Fellowship Training

  • MBBS, MRCS (General Surgery), DMedSci (Molecular immunology), JAG (Endoscopy), FRCS (Colorectal), FEBS (Surg Oncology)

  • Honorary Associate Professor of Surgery (Auckland)

Personalised Health Optimisation Consulting with Lisa Tamati

Lisa offers solution focused coaching sessions to help you find the right answers to your challenges.

Topics Lisa can help with: 

Lisa is a Genetics Practitioner, Health Optimisation Coach, High Performance and Mindset Coach.

She is a qualified Ph360 Epigenetics coach and a clinician with The DNA Company and has done years of research into brain rehabilitation, neurodegenerative diseases and biohacking.

She has extensive knowledge on such therapies as hyperbaric oxygen,  intravenous vitamin C, sports performance, functional genomics, Thyroid, Hormones, Cancer and much more. She can assist with all functional medicine testing.

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  • Basic Blood Test analysis

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  • Nutristat

  • Omega 3 to 6 status

and more 

Lisa and her functional medicine colleagues in the practice can help you navigate the confusing world of health and medicine .

She can also advise on the latest research and where to get help if mainstream medicine hasn't got the answers you are searching for whatever the  challenge you are facing from cancer to gut issues, from depression and anxiety, weight loss issues, from head injuries to burn out to hormone optimisation to the latest in longevity science. Book your consultation with Lisa 


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 To pushing the limits,

Lisa and team

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I am getting my mojo back with regards to my health and running after treatment for breast cancer, I connected with Lisa as I was looking for positive influences from people who are long distance runners and understand our mindset. Lisa’s podcasts have been a key factor in getting me out of a negative space where I allowed others limiting beliefs to stop me from following my heart and what I believe is right for me. After 18 months of being in cancer recovery mode I wanted to get out of the cancer mindset and back to achieving goals that had been put aside. Listening to Pushing The Limits has put me onto other great podcasts, and in the process I have learnt so much and am on a pathway to a much better place with my mindset and health. Thanks so much Lisa for doing what you do and always being you.