About Us



We are most certainly not the food police. Quite the contrary, we are very much ‘foodies’,  who enjoy good cooking and wine in moderation. Over time Sian will share with you some of her recipes and culinary recommendations.

Sian Shepherd


Hippocrates, father of medicine, 431 B.C.

meet our team

friendly and passionate

Sian Shepherd

Sian’s profile on the BMI website

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Sian Shepherd


Sian is a Specialist Gastroenterology Dietitian who has combined 25 years’ experience within the NHS alongside 15 years within the private sector. She has worked at The Royal Marsden NHS Foundation Trust, Kings College Hospital NHS Foundation Trust and most recently The Whittington Hospital, Guys and St Thomas’ NHS Foundation Trust and The Royal Free NHS Foundation Trust, based at their main hospital in Hampstead and Barnet and Chase Farm sites.

During Covid-19 pandemic she has been running remote gastroenterology clinics in association with the Consultant Gastroenterologists and Dietetic teams at The Whittington Hospital. At the same time, Sian has been proud to be a very small part of the UK effort addressing Covid-19, in her role as a Tier II Clinical Test and Trace officer in association with Public Health England.

She has worked alongside some of the leading Gastroenterologists in London. In 2016 she worked with the renowned Gastroenterology team at Guys and St Thomas’s NHS Foundation Trust providing nutritional guidance to patients with inflammatory bowel disease and irritable bowel syndrome. In 2013 she worked extensively with liver patients at The Homerton University Hospital. She regularly sees patients at her private practice at BMI Cavell and BMI Kings Oak Hospitals with a range of digestive disorders. She is fully trained as a Kings College Low FODMAP practitioner and has repeatedly achieved excellent results with a large number of patients, helping them identify which foods are problematic and subsequently equip them to manage their symptoms of irritable bowel and other functional gut disorders.

Sian studied Nutrition and Dietetics at the University of Surrey before joining The World Food Programme aid programme in Lesotho for two and a half years, where she worked supporting the food aid programmes in primary schools, developing recipes in association with a thriving school garden programme.

She was privileged a few years ago, to be nutritional adviser to Raymond Blanc when he was compiling his book and popular BBC series Kitchen Secrets. She was part of the award-winning catering and dietetic teams at The Royal Marsden Hospital, receiving ‘Good Food on the Public Plate’ awards in 2009 and 2010 from Sustain, for incorporating local, seasonal and organic produce into the hospital menus. Improving hospital catering continues to be a lifelong passion.

She is delighted to be working in the Spring of 2021 as an Ambassador for Symprove.  She shares the same values as Symprove, in acknowledging the relationship with the gut is a vitally important one, in terms of the role it plays in digestion, general health and the gut-brain axis.

In recent years, Sian has undertaken medico-legal work on behalf of some leading law firms and is accredited with both the UK Register of ExpertWitnesses  and has recently been appointed to the panel for high value cases with Premex medico-legal services.

She is fully registered with the Health and Care Professions Council, is a member of the British Dietetic Association (MBDA), member of the Gastroenterology, Sports Nutrition Specialist and London branch groups of the BDA and is committed to ongoing Continued Professional Development. She was awarded the BDA Advanced Diploma in Dietetic Practice and Professional Development Award in 2013.

She loves cooking for her family and friends and enjoys trying new recipes and challenging herself, whether it be in the kitchen, skiing in the Alps or sailing in the Solent or Mediterranean.

Andrew Millar BSc MD FRCP

Consultant Gastroenterologist and Hepatologist

  • Consultant Gastroenterologist and Hepatologist, North Middlesex University Hospital
  • Honorary Consultant Hepatologist, Royal Free Hospital, London
  • Associate Professor at the University of St George’s, Grenada, West Indies
  • UCLH Cancer Collaborative Lead for the Multidisciplinary Diagnostic Centre Project (MDC)

Dr Andrew Millar is a Consultant Gastroenterologist and Hepatologist at the North Middlesex University Hospital where he is also the Lead Clinician for Upper Gastrointestinal Cancer and the Viral Hepatitis Services.

He has a passion for ensuring patients are given a rapid and effective diagnosis so that treatment can start early. Dr Millar leads the development of the Multidisciplinary Diagnostic Centres, which is key project of the UCLH Cancer Collaborative. This work began when he was the London Cancer Hepato-biliary and Pancreatic Pathway Director and he now focuses on leading this growing project which is jointly funded by NHS England and Cancer Research UK.

The Multidisciplinary Diagnostic Centres aim to improve access to care for patients with concerning cancer symptoms in North Central and East London who do not meet the criteria for existing rapid referral or are to unwell to wait for a conventional appointment.

He is passionate that diagnosis must start with a careful record of symptoms and patient’s concern, supported by relevant investigations. He is also helping to develop technology to obtain clinical information from patients to enhance clinical care and provide key data for the development of new clinical decision support tools (CDSTs).

Statement of Interests: Has received funding from Cancer Research UK, Gilead Sciences Ltd, Janssen Ltd, Merck Sharp & Dohme Ltd. He is a Director of GI Diagnostics Ltd and a shareholder in Medefer Ltd.

Dr Andrew Millar

Andrew’s profile on the BMI website

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Professor Lee Dvorkin


We also work closely with renowned specialist general, colo-rectal and laparoscopic surgeon Professor Lee Dvorkin when patients need a surgical review or intervention.

Professor Lee Dvorkin’s clinical practice includes the investigation and management of gastrointestinal problems, such as irritable bowel syndrome (IBS), inflammatory bowel disease, diverticular disease, abdominal pain and all common anal conditions (rectal bleeding, haemorrhoids, fissures and fistulae).
He is formally accredited in colonoscopy and gastroscopy and undertakes laparoscopic (keyhole) surgery for gallstones, appendicitis, hernias and bowel cancer.

His research focused on pelvic floor disorders and has been presented both nationally and internationally. Professor Dvorkin was awarded an MD by the University of London for this work and he continues with his surgical research and to publish original works.


What our clients have to say

I was initially referred to Mrs Shepherd following a diagnosis of IBS in 2012. At that time she introduced me to a low fermentable carbohydrate (FODMAP) diet which was a complete revelation. Within a three month period, I noticed a significant improvement in all of my symptoms and, with Mrs Shepherd’s professional expertise and guidance, […]
Sian was my saviour through my treatment. She instilled so much confidence in me that I followed her advice on foods I could and could not eat. She is a professional and knowledgeable in her trade, her service was impeccable. I had regular consultations with Sian who also worked closely with Dr Karp, my oncologist. We were overwhelmed that my bloods were good, including my iron levels and blood cells. This was due to changes in my diet.
Higher Education Tutor
It was lovely to meet you today. I was so excited for your information that I instantly installed the ap. You have given me great hope and I feel it will work. You have such a wonderful way of doing your job and sympathising with what I am going through. Having met many doctors with my symptoms, I feel there is finally light at the end of the tunnel. I am just grateful Dr Miller recommended you.
Company Director
I visited Sian after being recommended by a gastroenterology consultant I have a non alcohol fatty liver. After my first session with Sian she introduced the idea that the cause may be that I binge eat. 
Having the open, honest and calming conversation with Sian really opened my eyes to my eating habits. 
She recommended a programme for me to improve my liver health and I now feel so much better. 
Thank you Sian for your coaching.
Local Government IT Consultant

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We are focussed on supporting you to achieve a swift and accurate diagnosis of your digestive symptoms and help you to receive the right treatment and to manage your symptoms effectively.