The PRofessionals
Meet the Team
Our team brings together leading medical, longevity, and integrative health professionals united by one shared purpose: to redefine how healthcare is delivered and experienced. Each specialist combines clinical expertise with a deep commitment to connection, compassion, and care.
Co-founder, Gastroenterologist & CHIEF MEDICAL DIRECTOR
Dr Omer Khalid
Dr. Omer Khalid is a co-founder of PHC and a Board-certified Gastroenterologist with advanced training in hepatology, internal medicine and obesity medicine. Heâs dedicated his career to caring for people, not just treating diseases, but helping each patient to become a healthier, stronger version of themselves.
His work spans years of clinical practice and research, including extensive experience with clinical trials aimed at bringing better, evidence-based options to those who need them most. He believes that staying at the cutting edge of medicine isnât just a professional responsibility; itâs a way to ensure his patients receive the very best care possible. What truly drives him though, is connection. He sees every patient as a partner on a shared journey towards better health. Whether heâs managing digestive conditions, supporting liver health or tackling weight and metabolic challenges together, his goal is always the same: to listen, to guide and to empower.
Dr Khalid is especially passionate about longevity and healthy ageing. His aim is to help people not only live longer but to live better, building habits and making choices that support lifelong vitality. Itâs a privilege for him to be part of that journey with his patients every single day.
Professional Associations:
American College of Gastroenterology
American Society of Liver Disease
American Board of Obesity Medicine
Co-founder
Bilal Khalid
Bilal Khalid is an experienced professional with a background in law, finance, and business management. He holds an LLB with Business Studies and an LLM in Commercial Law, and has completed all ACCA papers.
Before founding his own companies, Bilal worked as a Management Accountant in both industry and professional firms, where he developed a strong foundation in financial management, compliance, and operational efficiency. He is the founder and director of Maxspace Projects Ltd, overseeing the delivery of high-quality residential and medical construction projects across the UK, with a focus on professionalism, safety, and long-term sustainability.
Bilal is also a co-owner of Hubkom Solutions, which provides administrative and operational support to healthcare practices, helping them enhance efficiency and patient care. In addition, Bilal is a qualified personal trainer and continues to be passionate about the health and fitness industry, which inspired his desire to establish a wellness clinic aimed at optimising peopleâs lives through improved health and wellbeing.
Hannah Potter
Dr Mayoni Gooneratne MBBS, BSc, MRCS, AFMCP is a functional medicine doctor, educator and former NHS surgeon with a deep commitment to personalised, connected care. She is the founder and medical director of Human Health and SkinFit, clinical models she created to help women thrive from the inside out by integrating medical insight with functional, lifestyle-based support. She is also the creator of Human Health Professionals, a clinician-focused education platform designed to support health professionals in delivering sustainable, root-cause care.
Functional Medicine Doctor & FM Medical Director
Dr Mayoni Gooneratne MBBS, BSc, MRCS, AFMCP
Dr Mayoni Gooneratne MBBS, BSc, MRCS, AFMCP is the Functional Medicine Medical Director at PHC, a leading educator, and a former NHS surgeon. As the founder of Human Health and SkinFit, she has developed rigorous clinical frameworks that combine medical science with personalised, lifestyle-led interventionsâall delivered through a metabolic, root-cause lens. She is also the creator of Human Health Professionals, an educational membership supporting clinicians to elevate standards of sustainable, systems-based care.
In her role at PHC â Personalised Health Clinics, Dr Mayoni leads the clinical delivery of PHCâs functional medicine offering. Together, they are building a new model of careâone that puts time, trust, and tailored intervention at its heart. Her focus is simple: spending more time with people, listening properly, and creating personalised plans that fit real life.
A former colorectal and pelvic floor surgeon, her early academic research in pelvic neurology exposed critical gaps in womenâs health understanding and accessâinsights that informed her transition into functional medicine and the establishment of Human Health in 2020. She now designs and delivers evidence-informed pathways that support women through hormonal transitions and the complex realities of modern metabolic and endocrine health.
Dr Mayoni is Vice President of the British College of Functional Medicine, a TEDx speaker, curator of the Medical Longevity Summit at CCR, chair of Future Patient, and an award-winning voice in the aesthetics and wellness sectors. Named Most Influential Speaker at CCR 2023, her work has been featured in Tatler, Cosmopolitan, Top SantĂŠ, Womenâs Health and multiple peer-reviewed medical journals.
Consultant Psychiatrist
Dr Chetna Kang
Dr Chetna Kang is a Consultant Psychiatrist based in London, with over 25 years’ clinical experience. She qualified as a medical doctor from Imperial College Medical School, progressing on to specialise in general adult and liaison psychiatry and has extensive experience in both the NHS and private sector. She takes a Person-Centred Integrative approach, where a variety of interventions and treatment options are considered, such as psychotherapy, medication, nutraceuticals, meditation, yoga, neuromodulation devices, Ayurveda and gut health. Her expertise includes adult ADHD, stress-related disorders, depression, bipolar disorder, anxiety, psychosis, functional disorders, personality disorders, and behavioural addictions. She has a special interest in Spirituality in Psychiatry and sits on the Royal College of Psychiatrists Executive Committee for Spirituality and Psychiatry SiG.
Passionate about raising awareness of mental health and reducing the stigma, Dr Kang has worked with BBC radio for 15 years on several programmes. She continues to feature on TV, radio, podcasts, broadsheets and digital media, offering her expertise on mental health problems, wellbeing and spirituality. She has contributed to several books and journals. Dr Kang also runs wellness workshops for several large high-profile organisations such as Ernst & Young, Barclays Bank, Goldman Sachs, Intel and Accenture. She looks forward to walking with you on your journey of self-discovery and recovery.
Professional Associations:
The Royal College of Psychiatrists
General Medical Council (GMC) Specialist Register
Gastroenterologist
Dr Konstantinos Mantzoukis
Dr Mantzoukis (GMC no: 7121894) specialises in gastroenterology, hepatology, diagnostic and therapeutic endoscopy (gastroscopy, colonoscopy, capsule endoscopy, double-balloon enteroscopy) and has an extensive experience with the use of intragastric balloons since 2013.
He qualified in Gastroenterology in 2011 in Greece and came to the UK with a scholarship to pursue further specialisation in Hepatology at the Sheila Sherlock Liver Centre at the Royal Free Hospital in London. Dr Mantzoukis is a JAG accredited trainer in endoscopy (UK) with extensive work experience in university hospitals at the NHS as well as the private sector in Greece and in the UK.
He has published several articles in gastroenterology, co-authored medical book chapters and has participated in various research projects at academic level.
Registered Nutritional Therapist & Functional Master Nurse
Kaley Johnson
Kaley began her career as a Registered Nurse in Canada and practiced for 10 years as an advanced critical care nurse. Later, whilst living abroad with her husband and raising two children, Kaley explored integrative therapies and became a Yoga teacher.
Kaley completed a Masterâs Degree in Nursing from University of Athabasca and graduated with distinction from ION via Portsmouth University as a Nutritional Therapist (GradDip) and is fully registered with BANT (British Association of Lifestyle Medicine and Nutritional Therapy).
Kaley believes the philosophical ideals of Nursing and Functional Nutrition have a synergistic potential to source the root cause of imbalance in the body and provide effective holistic support to a variety of clients.
Kaley is constantly educating herself to better serve her clients. She is certified with NTEC (Nutritional Therapy Education Commission) to support clients with cancer and is a Nutrigenomics Practitioner with LifeCode Gx.
The path to longevity
The PHC MethodÂŽ
Detox & Cleansing
Guidance & treatment from our functional medicine doctors and registered nutritionists to reset the body; including personalised meal plans and bespoke PHC supplement programmes.
Digestive Health & Nutrition
Tailored meal plans and nutritional supplement courses to optimise gut function and overall nutrition. Based on test results and delivered by our functional medicine doctors and registered nutritionists, we support you with IBS, food sensitivities and reflux to name but a few.
Hormones & Menopause
Using a 360 degree holistic perspective, we approach hormonal imbalances and make menopause symptoms more manageable with help from our specialist recommendations.
Weight Loss & Weight Management
We provide non-surgical solutions for weight loss and management including the Allurion Gastric Balloon, GLP-1 peptides and personalised programmes of bespoke nutrition & supplements delivered by our highly experienced team of functional medicine doctors and registered nutritionists.
Functional Medicine
An intelligent, powerful approach to treat and prevent illness & pain and improve health for longer – that focuses on the root cause.
Ancient & Natural Therapies
Drawing upon the timeless wisdom of holistic health through ancient practices such as Chinese & Ayurvedic therapies and naturopathic medicine.
Mindset and Elite Personal Training
Virtual mindset coaching and 1-1 personal strength and conditioning coaching to increase successful goal setting, accountability, resilience and coping mechanisms of both body and mind.
Longevity & Healthy-ageing
Each journey begins with our private functional medicine doctors, ready to assess your individual needs and health aspirations.
Emotional Health & Wellbeing
The PHC difference lies in our approach to the mind – we know that mind and body are inextricably linked, and provide emotional support at each step of the process.
Wellness
Our approach to wellness is holistic; with all aspects of the PHC Method combining in perfect synergy to allow you to live a healthier, happier life, for longer.
Interdisciplinary Holistic Care
Become a PHC Member
For the ultimate route to optimising your healthspan & wellness, our memberships guide you through a personalised version of the PHC MethodÂŽ.
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