Personalised Care for Better Health
F3 Optimising Health offers a medically informed and personalised approach to health and wellbeing. Our aim is to help people understand their health more fully, address current concerns, and make realistic changes that support better energy, resilience, and long-term vitality.
Our Philosophy
At F3 Optimising Health, we believe good healthcare should be personalised, preventive, and evidence-informed.
Personalised
We take time to understand your medical history and lifestyle to create a tailored plan for your unique health journey.
Preventive
We focus on proactive health strategies to identify and address potential issues before they become significant concerns.
Evidence-Informed
Our recommendations are grounded in clinical research and functional medicine principles for maximum effectiveness.
Practical
We provide clear, achievable steps that are realistic and relevant to your specific health goals and current lifestyle.
Our Clinical Approach
We integrate evidence-based clinical expertise with functional medicine principles to deliver a comprehensive, preventative healthcare experience.
Clinical Precision
Our team combines traditional medical assessment with advanced diagnostic testing to ensure a thorough understanding of your health profile.
Lifestyle Medicine
Our approach is practical and evidence-informed, focusing on sustainable changes in nutrition, movement, and sleep to support long-term vitality.
Functional Medicine
We look beyond isolated symptoms to identify root causes, creating tailored plans that address the bigger picture of your overall wellbeing.
Preventive Care
We prioritize proactive strategies to reduce cardiometabolic risk and build resilience, helping you maintain a healthy and active life.
Who We Support
We are dedicated to supporting adults who are committed to a more proactive and preventive approach to their health and longevity.
General Health
Preventive Care
Individuals seeking a broader understanding of their health and wellbeing, aiming to improve their overall vitality and quality of life.
Adults who want to reduce their long-term cardiometabolic risk and take a more evidence-informed approach to future health.
Longevity
Those who are already in good health and want to optimise their resilience and maintain physical and mental wellbeing.
Meet the Team
Dr. John Reid
MbChB FRCS MRCGP
Dr John Reid has been a GP in the Bristol area for 30 years and continues to be passionate about general practice. His clinical interests include functional medicine, surgery and general medical practice, and he holds postgraduate qualifications in both surgery and general medicine.
He regards the NHS as an excellent disease-based model of care. Once medical and surgical treatments are stable or complete, patients seeking to further optimise their health may choose to undergo a more detailed functional medicine and healthy-ageing review.
This may include consideration of genetic and microbiome analyses, alongside a broader assessment of mental and general health. Where appropriate, this can help inform a personalised approach to healthy ageing, ranging from lifestyle optimisation to more advanced interventions focused on cellular health, peptide therapies, senescence-targeting medicines and the selective use of nutritional supplements.
Catherine Twine-Kelly
Catherine Kelly brings over 30 years of experience working across health and social care, supporting individuals with complex physical, mental, and behavioural health needs. Her career has been dedicated to helping people improve their wellbeing, overcome barriers to change, and achieve better quality of life through practical, person-centred approaches.
Catherine holds a Master of Science in Physician Associate Studies and Functional Medicine Certified Professional by the Institute of Functional Medicine. She combines conventional medical knowledge with a strong interest in understanding the root cause of a health condition, prevention, and health optimisation. She is currently undertaking a PhD at University of Bristol, researching how lifestyle interventions can improve the physical health and wellbeing of people living with severe mental illness.
As founder of F³ Optimising Health, Catherine combines evidence-based medicine with functional and lifestyle medicine principles to help clients better understand the factors influencing their health. Her approach considers nutrition, physical activity, sleep, stress, social connection, and behavioural change, recognising that long-term health is shaped by multiple interconnected factors. Through F³’s focus on Fun, Fitness and Food, Catherine works collaboratively with clients to create realistic, personalised plans that support lasting improvements in health and wellbeing.
“My aim is to help people move beyond simply managing symptoms and towards understanding the factors that influence their health, empowering them to make sustainable changes that improve both how they feel today and their long-term wellbeing.”
MSc PA studies
Client Testimonials
Anonymous
I am most appreciative to Dr Reid for providing me with effective clinical assessment and advice on the use of peptides to optimise my health, along with demystifying useful supplements from the many available.Dr Reid instills full confidence through attentive listening to my needs and goals, providing clear, jargon-free explanations, along with precisely tailored recommendations, resulting in a practical, phased action plan to achieve balanced, sustainable well being.This has already yielded positive results, surpassing my expectations.Dr Reid's genuine empathy, great depth of knowledge and experience, together with strong commitment to support healthy individual lifestyle change, has been a highly meaningful experience for me.I find Dr Reid easily accessible and always helpful to address my on-going questions, at the same time nudging me on a challenging, transformative personal journey.
Ed
I found the health check really valuable. Cath’s advice was clear, practical and easy to understand. She encouraged me to become more aware of my day-to-day health, including using a glucose monitor and sleep tracker to better understand how my lifestyle choices affect me. Cath then used these insights to suggest practical changes that I could easily incorporate into everyday life, helping me make more informed choices and work towards my health goals.
AM
I found the health check really valuable. Cath’s advice was clear, practical and easy to understand. She encouraged me to become more aware of my day-to-day health, including using a glucose monitor and sleep tracker to better understand how my lifestyle choices affect me. Cath then used these insights to suggest practical changes that I could easily incorporate into everyday life, helping me make more informed choices and work towards my health goals.