
TEAM
To ensure we deliver on our mission and our vision we’ve assembled a world-class team of experienced doctors, scientists, business people, liver specialists, and leading medical experts.

Siggi Clavien
Siggi Clavien is a visionary entrepreneur dedicated to advancing liver health through innovative solutions. As the Founder and CEO of The Liver Clinic and de-liver-ance, Siggi leads a mission-driven team of chemists, scientists, and medical professionals focused on preventing and treating liver diseases globally. Siggi’s background combines viticulture from UC Davis, Plant Medicine from Cornell University, and a deep understanding of traditional herbal medicine and biotechnology.
With a British nurse and healer mother, and influenced by his Swiss winemaker father, Siggi brings a unique, global perspective to his work. His personal commitment is fueled by the tragic loss of loved ones to liver disease, driving his passion to create a world free from chronic liver-related conditions.
Siggi’s dedication extends beyond business. A father of five, he balances life between Southern California, Arizona, and London, traveling with his family to raise awareness and provide support for those affected by liver diseases.

CASSANDRA ODQVIST
As a wellness entrepreneur with a deep understanding of international markets, Cassandra Odqvist Clavien is on a mission to make liver care both accessible and appealing. As Co-Founder and Brand Director of The Liver Clinic and de-liver-ance, Cassandra plays a pivotal role in driving the company’s mission to transform liver health through education and innovative solutions.Raised in Mallorca, Spain by a Swedish father and Irish mother, Cassandra’s multicultural upbringing influences her approach to building a brand that resonates globally. Fluent in five languages, she has a deep understanding of international markets, which often informs her strategic direction. After studying modern languages and business at The University of Birmingham, Cassandra spent 10 years leading sales teams in the London M&A software industry before transitioning to the health and wellness sector in 2016.Her passion for health and wellness blossomed when she met her husband and co-founder Siggi Clavien. Leveraging her background in sales, the two embarked on a journey to develop de-liver-ance, with Cassandra expanding her expertise by studying nutrition to better align with their mission. Beyond her professional endeavors, Cassandra is deeply committed to children’s health and ocean conservation. She balances her entrepreneurial endeavors by homeschooling her children and dividing her time between Europe and the US.

Mimi Somerman
Mimi Somerman is a highly accomplished, award-winning executive whose career spans leadership across industries, including 12 years at PepsiCo (CPG) and two decades driving growth in hospitality, healthcare, advertising, retail and e-commerce. Notably, she played pivotal roles in significant company expansion, M&A, and exits.
Renowned for her ability to navigate complex growth and turn-around situations, Mimi blends strategic insight with operational expertise to craft high-performing organizations. Her leadership is defined by a passionate commitment to team building, fostering cultures of collaboration, and delivering beyond expectations. Whether creating and optimizing operational processes, driving innovations in digital marketing, or steering product development, she brings a holistic, results-oriented approach to every challenge.
Beyond her professional accomplishments, Mimi is deeply committed to health and wellness, particularly in advancing the future of liver health. She is honored to make her current focus Equilibrium Labs, The Liver Clinic, and de-liver-ance, demonstrating her passion for making a tangible impact in preventing illness.
With a B.S. in Business Finance from California State University, graduating magna cum laude, and an MBA in Strategy from the UCLA Anderson School of Management, Mimi continues to blend her academic rigor with practical business acumen. Her journey reflects a consistent pursuit of excellence, innovation, and meaningful growth.

Chris Keeble
CFO with considerable expertise in Tech, FinTech and FCA regulated companies, extensive board level experience and leadership qualities gained within a succession of entrepreneurial ventures.

Dr. Gareth Morris-Stiff
- Cleveland Clinic - Staff Surgeon Hepapo-Pancreato-Biliary Surgery
- Associate Professor, Cleveland Clinic Lerner College of Medicine
- Surgical oncologist with 30-years’ experience,specializing in tumours of the liver, pancreas and biliary tree
- Graduated MBBCh from the University of Wales College of Medicine
- Higher degrees - MD, MCh, and PhD in Transplant immunology, post-transplant malignancies, and oxidative stress in the pathogenesis of aortic aneurysms respectively
- Founder and CEO of Glantaf Biopharma and InCymbiopharma developing new anti-cancer therapies using Western and Eastern approaches

Darshan Shah, MD
Darshan Shah, MD, is a health and wellness specialist, board-certified surgeon, published author, and founder of Next Health, the world's first and largest Health Optimization and Longevity clinic. Dr. Shah is a board certified surgeon who has performed over 20,000 surgical procedures, including trauma and complex reconstructive procedures. As a Longevity Medicine specialist, he has advised thousands of patients on how to optimize their well-being and extend their healthspan and lifespan. Shah began his career at an accelerated MD program and earned his medical degree at the age of 21, becoming one of the youngest doctors in the United States.
He continued his training at the Mayo Clinic, one of the most prestigious medical institutes in the country. After earning his board certification, he opened medical/surgical centers throughout California, started four other companies in the Health and Wellness space, and has published a book, authored numerous papers and patented medical devices. Dr. Shah’s belief in continual education and self-improvement has earned him alumni status at Harvard Business School, Singularity University, and other prestigious institutions. His passion is educating people on the topics of adding healthspan to your lifespan, having done over 100+ speaking engagements and hosting the critically acclaimed podcast Extend.

Prof. Dr. Rajiv Jalan
- Leading consultant hepatologist with more than 30 years of experience.
- Professor of Hepatology at University College London, Institute for Liver and Digestive Health, Royal Free Hospital.
- Head of the Liver Unit at the Royal Free Hospital, London U.K
- Editor in chief of one of the most important Medical journals on Liver health in the world.

Dr. Yadhu Rajalingam
- Senior Consultant in Anaesthesia and Intensive Care Medicine at the Royal Free London NHS Trust.
- Critical care anaesthesiologist at Royal Free hospital.
- Medical Practitioner and passionate about longevity and the future of health.
- Yadhu is a world leader in personalised Medicine and has a real passion for helping people live the best life.

Prof. Dr. Amina Ather
- Scientific Director, MPR, Germany,
- PhD Public Health, Post Graduate diploma in genetic sciences and gene therapy – EIH, Doctor of Medicine (RGUHS),
- Representative for ASIAN countries, European Medical Association.
- Post Graduate diploma in microbiology and computing application (FORD FOUNDATION) Regenerative medicine (USM). Fellowship in empowerment by ICT, gender and health (NIEW), Women empowerment (NAM), clinical trials – WHO.
- Ambassador for RED CROSS, “first aid for mental trauma”, Jury – UNESCO - Sustainable development goals.

Dr. Federica Amati
- Dr Federica Amati holds a PhD in Clinical Medicine Research from Imperial College London and is a registered nutritionist with the Association for Nutrition. She is actively involved in nutrition, public health and mental wellbeing research at Imperial College London; and cardiometabolic health and COVID-19 and nutrition research with NNedPro, a global institute for food, nutrition and health.
- She holds clinics for her clients both virtually and in person in central London. She focuses on improving overall dietary quality following the principles of a Mediterranean Diet to optimise gut microbiome function and harness long-term benefits to improve health. Alongside her research and private client consultations she teaches Nutrition to Imperial College medical students, works in science communications for ZOE, and consults for brands who are looking to make a big change through nutrition.

Dr. Jaroslav Boublik
- B.Sc. (Hons) from the Department of Chemistry, Monash University.
- Published over 30 peer reviewed and invited articles in scientific journals.
- Presented almost 40 scientific papers at research symposia, and is an inventor on four patents.
- Nutritional adviser to several elite athletes, including Olympic medalists.
- Developed dozens of new products for client companies in nutrition, sports performance, hydration and functional foods.

Dr. Haengwoo Lee
- Dr. Lee is a renowned Biochemist from Seoul, South Korea with a specialty in Traditional Chinese Medicine.
- PHD from University of Iowa in Bio-Chemistry
- Co-Inventor of herbal formulation De-Liver-Ance and Rizasalutem.
- Inventor and Patent holder of the super powerful antioxidant Seanol™
- Responsible for research of Diabetic complications and Metabolic Syndrome

Dr. Todd McCallister

Dr. Guénolé Addor

Dan Nieto

Mary Greenwell
- Esteemed makeup artist, heralded as one of the industry's top beauty influencers and trendsetters.
- Began her illustrious career at Il Makiage in Los Angeles, before becoming an apprentice to the brand's founder, Ilana Harkavi, in New York.
- Cemented her reputation in Paris in the 1980s, working with iconic photographers such as Patrick Demarchelier, Paolo Roversi, and Peter Lindbergh.
- Regular contributor to leading fashion magazines including Vogue Italia, Vogue UK, and Vogue USA; frequently collaborated with legendary editors Grace Coddington and Liz Tilberis.
- Created unforgettable looks for magazine covers featuring supermodels like Christy Turlington, Linda Evangelista, Stephanie Seymour, and Cindy Crawford.
- Played a pivotal role in redefining the image of Diana, Princess of Wales, through transformative photo shoot collaborations.
- Continues to be the preferred makeup artist for A-list celebrities, including Amanda Seyfried, Cate Blanchett, Elizabeth Debbicki, and others.
- Sustains ongoing partnerships with luxury brands such as Chanel and Armani.
- Active in philanthropy, supporting causes like Breast Cancer Awareness and the NSPCC, and serving as an Ambassador for the British Beauty Council as of 2023.
- Recipient of the Lifetime Achievement Award from CEW UK in 2015.
- Continuously sets the standard in the beauty industry, inspiring both contemporaries and aspiring artists with her visionary approach and distinctive style.

WILLIAM PYM

Dr. David Ramm
- Dr. David Ramm focuses his practice on private equity, venture capital and M&A transactions in the technology sector. David helps clients raise significant capital throughout their fundraising cycle, grow their businesses through commercial transactions, joint ventures and licensing, and progress to exit, either by sale or IPO. David represents both companies on the growth path and the investors that support them. He has over 20 years of experience assisting creative and IP-rich businesses, particularly in the life sciences, healthcare, financial services and security sectors, in corporate finance, M&A and commercial transactions. Many of the transactions that David assists clients with have a cross-border, or multi-jurisdictional, component.
- David’s clients include large financial institutions and companies at the forefront of technological development, as well as exciting early stage and growth companies in the life sciences, healthcare, fintech and security industries. As a former PhD scientist and engineer, David brings a unique perspective to the practice of law in the technology sector.

Suhail Al Ansari
- Founding & Managing Partner at Biolinka Investments LLC Biolinka).
- Executive Director at Mubadala Investment Company (Mubadala).
- Vice Chairman at the Cleveland Clinic Abu Dhabi.
- Chairman of the Board of Directors of The Imperial College London Diabetes Centre, Healthpoint Hospital, National Reference Laboratory, Tawam Molecular Imaging Centre, Capital Health Screening Centre, Abu Dhabi.

Andy Clarke
- Former CEO of Asda / Walmart.
- Chairman of Leeds Bradford airport.
- Chairman of Newton Group.
- Chairman of Spoon Guru.
- Chairman of Immodulon therapeutics.
- Board advisor of AMP Capital.

Julian Walford
- Top UK Strategic Consultant.
- Grew Veuve Clicquot from 300,000 bottles to 2.3 million bottles per year.
- Grew Boodles Jewellers from a turnover of £7m to £60m.
- Grew Links of London from one to twenty three retail outlets.
- Key strategic consultant for Redbull.
- Has grown over £1 billion in revenues for client companies.