Welcome to Functional Medicine Associates

We are a team of IFM certified practitioners founded by Pete Williams, the first IFM certified practitioner of Functional Medicine in the UK. We are located in the prestigious Harley Street district of Central London. Our team has had many years of experience in helping patients improve their health and well-being through our functional medicine approach.

Our IFM certification means we differ from most other functional medicine practitioners due to our rigorous training and examination. Our certification is recognised as “the gold standard of functional medicine training worldwide”

We recognise that complex chronic disease is just that complex. Quick fix medication for every ill ignores the fact that humans are also complex eco-systems, that need multiple interventions rather than a single bullet approach. We firmly believe that treatment should be by root cause, rather than just by symptoms. Through these experiences, we continually learn from our patient’s challenges allowing us to constantly refine our service to you. 


Pete Williams

M.Med.Sci, CSCS, IFM Certified Practitioner, Bredesen Trained Practitioner

Founder of Functional Medicine Associates Pete is an exercise and medical scientist. In 2002 he was part of the UK’s founding group of Certified Strength and Conditioning Specialists, as accredited by the National Strength and Conditioning Association of America. In 2004 he became the youngest ever recipient of a ‘Lifetime Achievement’ award from the Register for Exercise Professionals. In 2013 he was in the first worldwide cohort to be awarded Institute for Functional Medicine Certified Practitioner status and has represented the Institute for Functional Medicine as a Clinical Innovator.

Pete has had over 20 years of experience applying Functional Medicine in clinical practice and is seen by his peers as one of the leading figures in Functional Medicine in the UK. He is a sought-after speaker and advisor to nutraceutical and lab testing companies. Pete is currently developing a genomics panel in collaboration with genomics company DNAlysis due for release at the end of 2020. Throughout this time, he has treated people with a wide range of chronic diseases.

Pete is a personal and professional advocate of exercise and the key role it plays in health. He loves to practise what he preaches in all aspects of life including keeping up with his two young sons.

Areas of specialism

Executive Health

Optimised body & brain

Chronic Fatigue/Gut Health

Less pain more energy

Brain Health

Bredesen Trained Practitioner

After 30 years in high-pressure corporate environments such as Morgan Stanley and Deloitte, Despina had the first-hand experience of the detrimental effect a corporate lifestyle can have. This led to a career change to healthcare culminating with the prestigious IFMCP practitioner award in 2016. Despina has worked for the Institute for Functional Medicine (IFM) as a Business Development Consultant and as a contributor to the IFM best practice initiative by setting up tools, clinical processes and systems for excellence in their primary care health practice model.

Despina embraces the systems biology approach and 4 P Medicine (personalized, participatory, preventative and predictive) as the current health care model. Her most recent King’s College MSc entitled: The Microbiome in Health and Disease, has further highlighted to her, the importance of ‘omics science’ in achieving wellness and the need to encourage species diversity across the human microbiome. Despina works with clients in restoring balance in their body & their environment while at the same time teaching them daily practices to foster resilience in both body and mind. 
Despina loves to keep fit, to travel and cook for friends and family, and to explore how to best use advances in technology to aid clients in achieving their wellness goals.
Areas of specialism

Mind-Body Vitality

Restore your energy

Health Aging

Resillience / Longevity

Blood Sugar Balance

Achieve optimal weight

Gut Health

Healthy bacteria, Healthy You

Despina Giannopoulou

MBA, MSc Personalised Nutrition, MSc Microbiome and health, IFM Certified Practitioner Certified Gluten Practitioner, Bulletproof Human Potential Coach

Alex Manos
BSc Nutritional Therapy, MSc Personalised Nutrition IFM Certified Practitioner 2016
Alex completed his MSc dissertation on cortisol resistance in Chronic Fatigue Syndrome and thus has a passion and experience in supporting clients with this condition.
Alex has 13 years’ experience in the industry. In that time, he has lectured at various colleges and institutions including MSc programmes. As well as teaching students, Alex has more recently returned to the educational world and mentors nutritionists and functional medicine practitioners.

Aside from his experience in nutritional therapy, Alex has a vast range of qualifications and experience in personal training and is a transformational life coach. This allows Alex to work at a deep level within all three realms of health and performance: nutrition, exercise and mindset.

Outside of work Alex is honing his cooking skills to support his clients in the kitchen, and is a keen golfer, meditator, reader and a dark chocolate and coffee lover.

Areas of specialism

Gut Health

Calm gut - Calm you

Chronic Fatigue

Chronic Fatigue Syndrome

Optimal Performance

Resilience / Longevity

Deirdre started her academic career with a degree in Biopsychology from Drew University in New Jersey. She then worked as a research assistant in the Dept. of Human Genetics at Mt. Sinai Hospital in New York while simultaneously working as the top personal trainer at one of New York’s finest fitness facilities. This combination led her to pursue a master’s degree in Osteopathy and then her Masters in Pain Neuroscience at King’s College London. Her father, a Paediatric Neurologist encouraged her to take the IFM Certification pathway and she qualified in 2016.

Deirdre is regularly asked to speak and advise to nutraceutical and lab companies. She has recently co-authored a chapter with Associate Professor of Medicine Gerard Mullin in “Integrative Gastroenterology” by Oxford University Press due to be published summer 2019.

Deirdre lives to an 80/20 rule. She loves yoga, all types of exercise and is a self-confessed film nut.

Areas of specialism

Chronic Pain

The Brain in Pain

Gut Health

Healthy Gut, Healthy You


Harmonising Hormones


Healing Your Skin from Within

Deirdre Nazareth

MSc Ost Medicine, MSc Pain Neuroscience, IFM Certified Practitioner, Dip Osteopathy, Dip Naturopathy, IIN certified health coach

51 New Cavendish Street, London, W1G 9TG • +44(0)7388812179
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