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Meet Our Practitioners

Our team of practitioners have been selected by David Brassey, lead practitioner and founder and of the business. Our intention is to ensure that we offer personalised, friendly, clinically evidenced general nutritional and supplement advice based solely upon the information provided by the customer/client. If you are already working with a health care professional they should always be consulted in the first instance. If for any reason they cannot be contacted and you need help we will always try to assist you. it is important, however, that you refer back to your health care provider before acting upon the advice of our practitioners as they do not have access to your full case history.


Functional Nutrition was founded in Sheffield, United Kingdom by Nutritional and Functional Medicine Practitioner David Brassey in 2007.

David holds a Post-Graduate Diploma in Nutritional Therapy and regularly attends seminars all over the globe to keep up to speed with the latest developments in the field of nutrition and wellbeing.

He has undertaken many Functional Medicine training modules with Apex Energetics in the United States and been mentored by Dr Daniel Kalish founder of the Kalish Functional Medicine Institute in New York. 

His main focus is identifying and sourcing alternative natural healthcare solutions to the chronic diseases that are plaguing our developed societies today.



A highly qualified Naturopathic Nutritionist and Integrative Natural Health Practitioner, Rob Fordham completed his studies at the College of Natural Nutrition run by respected Naturopath and author Barbara Wren. He also holds a Certificate of Higher Education in Nutritional Therapy, from the University of Westminster and is a member of the Naturopathic Nutrition Association.

Passionate about all forms of Natural Healing, Rob is also an accredited EFT International, Advanced Emotional Freedom Technique (AdvEFT) practitioner. He is trained in Matrix Reimprinting, also EFT based, has undertaken numerous Kinesiology (muscle testing) based courses and trained in NLP to Master’s level, Functional Medicine, Massage Therapy and Myofascial Release.

Rob enjoys sharing his knowledge and helping people achieve a better quality of life through natural healing methods. He is an effective communicator, good listener and a genuine, approachable person. In his spare time, Rob loves drumming and meditation.


Marika is a fully qualified Nutritional Therapist with five years of clinical experience working with a wide range of conditions; including Hashimoto’s disease, celiac disease, IBS, high cholesterol and fertility issues. Her main areas of interest are fertility and pregnancy support as well as cardiovascular problems.  She sees her clients in Sheffield. Her approach in clinic is to work with the patient, who is the expert in their own health, to achieve maximum benefit. 

She first became interested in health after spending 7 months in a French hospital recovering from a bad motorbike accident. After that she struggled to conceive and had to go through many rounds of IVF. This prompted her to study nutrition and get her health back on tract.

Marika is a Director of Studies for the College of Naturopathic Medicine in Manchester, where she has graduated from. She teaches at CNM and enjoys helping students to become effective practitioners. Marika is accredited by the Complementary & Natural Healthcare Council (CNHC) a government-sponsored registration body for complementary healthcare practitioners. She is a registered member of the British Association for Applied Nutrition and Nutritional Therapy (BANT). She is also a Functional Medicine AFMCP graduate. Marika is originally from Finland and loves to spend her time with her 2 toddlers, walking up the Munros in Scotland (52 done!) and her massive Irish Wolfhound called Karhu.


Amanda graduated from the highly respected College of Naturopathic Medicine in 2014.  She is now the Director of Studies for the College in Manchester where she also works as a Clinic Supervisor and Lecturer.  After spending 12 years in Brazil following a naturopathic lifestyle Amanda became interested in studying nutrition and expanding her knowledge further.  Upon returning to the UK in 2010 she embarked upon her exciting journey and was able to resolve her own IBS and reflux symptoms at the same time.

She works with clients in the West Yorkshire area to support symptoms associated with a wide variety of health conditions from autoimmune diseases to IBS, skin conditions to hormonal imbalances to name a few.  She provides one-to-one consultations, groupwork in the workplace, runs workshops and enjoys the challenge of getting to the root cause of her clients’ symptoms, helping them achieve their wellbeing goals.  Her particular areas of interest are GUT health and the menopause.

“I absolutely love my job and feel blessed to be able to work in such a rewarding field. I enjoy empowering and educating my clients to encourage them to make nutritional and lifestyle changes to improve their health and wellbeing for life.”


 Sara has always had a passion for health from a young age and a fascination with the medicinal powers of food and nature after hearing stories of how her great grandad was nursed back to health using poultices and natural remedies after the first world war. 

She graduated from the University of South Wales in 2006 with a degree in Chiropractic and qualified from the College of Naturopathic Medicine as a nutritional therapist in 2014.  She has also completed courses in Emotional Freedom Technique and has an interest in mind the mind-body connection.

"I genuinely love to help people so if I can I will always try to get to the bottom of a health problem for someone.  There are so many factors at play when a person becomes unwell. I like to help people discover their unique reasons. It's helpful to find and manage the cause, not just the symptoms."


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