Dr Stavy · Your care options
Functional Medicine vs Conventional Medicine
Functional medicine and conventional medicine overlap in history-taking, prevention and lifestyle care. Their labels alone do not tell you if a test or treatment is useful. Compare the clinician’s training, the evidence for each suggested treatment, and who will remain in charge of your care before choosing a route.
What are you in fact comparing?
You are comparing a way of organising care, the person delivering it and the specific choices being offered. These are three separate questions. An appointment can feel thorough while still leading to a test that has little value. A short, focused appointment can lead to the right diagnosis or referral. Neither experience settles the evidence for a whole approach.
Functional medicine commonly places a strong emphasis on the relationship between symptoms, lifestyle and possible contributing factors. Conventional medicine includes prevention, diagnosis, treatment, rehabilitation and long-term support. It is incorrect to describe conventional care as interested only in easing symptoms. The useful question is how the care plan fits your real health problem.
For a starting explanation, read What Is Functional Medicine? Evidence, Principles and Limits. This comparison focuses on choices between approaches. It does not determine which investigations you personally need, and it does not mean that paying privately produces a more correct diagnosis.
Which parts of care can overlap?
Both approaches can include a medical history, examination, review of medicines, attention to sleep and nutrition, and talk of your priorities. Those methods are not exclusive to any one label. Their quality depends on how well they answer the question about your care and if the resulting choices are supported by evidence.
Weigh up what you want the appointment to resolve. You may need a fresh review of a symptom, help understanding past results, or a talk about a known diagnosis. You may instead need a specialist procedure or an urgent service. Naming that need makes it easier to compare right providers without relying on broad promises about treating the whole person.
Ask what the clinician would do if the history points away from their preferred approach. A credible answer allows for a standard investigation, referral, or no extra testing. It should also leave room for what is not yet known. A promise to find one hidden explanation for each symptom is not a substitute for a reasoned assessment.
What does the research tell us?
Research on a whole care model is different from research on one treatment. A study of a combined programme cannot show which element caused a change. Differences in time, access, patient selection and follow-up may affect results. Positive patient reports matter. They do not by themselves prove that the programme treats a disease better than another service.
Beidelschies and colleagues reported associations between functional-medicine care and some patient-reported health outcomes in a 2019 retrospective study. Its observational design cannot show that the model caused those differences. Eldib and colleagues’ 2026 randomised pilot in type 2 diabetes did not find a statistically significant added benefit on its main outcome. These studies concern different groups and cannot be used as a universal verdict for each patient. [2] [3]
When a treatment is suggested, ask for evidence about that treatment, for people with a similar problem, using an outcome that matters to you. Evidence for exercise or a medicine does not by itself validate each test, supplement or explanation packaged alongside it.
How should you compare tests and treatment plans?
A useful comparison asks what each planned step will change. Request the reason for a test, its limits and the plan for an unexpected result. The number of markers on a report is not a measure of the quality of care. An expensive panel may produce more questions without resolving the one that brought you to the appointment.
Ask the same questions about treatment. What benefit is realistic? What are the risks or burdens? How will progress be judged? What would make the clinician change or stop the plan? A written list of products is less informative than a clear account of the choice each product is meant to address.
You should be able to distinguish standard care from an unclear or exploratory option. If the evidence is limited, that limit belongs in the talk before you spend money or alter treatment. It should not emerge only after the approach has failed to help. Compare the total likely commitment, such as reviews and any separately charged items.
| Question | What to compare |
|---|---|
| Clinician | Key registration, training and scope for your concern. |
| Assessment | Whether history, current results and right examination inform the plan. |
| Testing | The clinical question, limits and action after each possible result. |
| Treatment | Evidence, risks, alternatives and a clear review point. |
| Continuity | Who follows up results and who oversees prescriptions. |
When should another route take priority?
Choose the route able to provide the health review or treatment you need. A functional-medicine appointment is not an alternative to emergency care, and a broad lifestyle review cannot replace a necessary specialist investigation. If you already have a treatment plan, discuss concerns with the doctor in charge of it rather than stopping it to try a different model. [4]
For an unresolved symptom, a useful first question is if a medical reassessment is needed at all. A recent normal result may answer one question without answering each possible question. Equally, what is not yet known does not by itself justify repeating each test. Bring the full reports so the next doctor can see what was in fact assessed.
Do not assume that an NHS GP will by itself carry out a private plan. Ask who will arrange each investigation, interpret the result and contact you. This is especially key when more than one clinician is involved. Advice and an accepted transfer of care are different things.
Can you use both approaches together?
Using private and NHS services can be compatible, but roles should be clear. Tell each key clinician about medicines, supplements and investigations elsewhere. Ask what details can be shared, with whom and with your agreement. The GMC’s prescribing guidance emphasises adequate details and right plans when care is shared. [4]
Make a simple record of each current treatment, who prescribed it and the agreed review. Include products bought without a prescription. If advice appears to conflict, ask the clinicians to make clear the reasons before making a change. You should not have to decide between contradictory guidance without a clear account.
The aim is a coherent plan that you understand. That may involve one clinician doing most of the work or several services handling different parts. Neither plan is inherently better. What matters is that key tasks have a named owner and that you know how to raise a concern if your condition changes.
What should you ask before booking?
Write down your main reason for seeking help in one sentence, then list the questions you need answered. Ask if the service covers that problem, what details to send and what is part of the fee. Explain any current diagnosis or specialist involvement so the practice can weigh up if the appointment is right.
It is reasonable to ask what would count as a useful outcome from the first appointment. This might be a clearer account of options, a plan for a targeted investigation, or recognition that another service is better suited. It need not be a new diagnosis or a large treatment package.
For details of the offered appointment, read Functional Medicine Doctor in London. Choose on the basis of fit, evidence and a clear plan for who is in charge. Appointment reviews can help you judge communication and experience. They cannot show that a given medical explanation or treatment is correct for you.
How can I compare two care plans on paper?
Put the two plans side by side. For each, write down the main goal in a short line. Then list what you would do, what you would pay for and who would check the result. Leave a blank where the plan does not say. Those gaps are useful questions to take back.
Next, mark which steps are new and which are part of care you have now. Does one plan ask you to stop or change that care? If so, ask who has agreed to the change. Do not treat a sales call as consent from the doctor in charge.
You can also ask each service the same short question: “What would you do if this does not help?” A clear answer should make room to stop, review or seek a different route. Keep the focus on the plan in front of you. A broad claim about one school of medicine will not fill a gap in that plan.
Common questions
Does conventional medicine only treat symptoms?
No. Conventional care includes prevention, diagnosis, treatment and long-term support. Symptom relief is one legitimate part of care. It is not the whole model. Compare the real assessment and care plan rather than assuming that a label tells you how carefully a clinician will weigh up your needs.
Is functional medicine proven to be better?
The evidence does not justify a blanket claim of superiority. Studies differ in their patients, methods and outcomes, and evidence for one treatment does not validate an entire package. Ask about the planned treatment itself, such as what is not yet known, alternatives and how its value will be reviewed. [2] [3]
Do advanced tests always give better answers?
No test should be judged by how advanced its name sounds or how many markers it measures. Ask what question it answers, if the result can change care and what its limits are. Past results may already answer the key question, so bring the reports rather than ordering replacements yourself.
Can I keep seeing my NHS GP?
A private appointment does not mean you must leave NHS care. Ask how details and roles will be coordinated, especially for medicines and follow-up. Do not assume your GP has received a private report or agreed to a planned treatment. Check the next steps with the clinicians concerned. [4]
Should I stop treatment before an appointment?
Do not stop prescribed treatment simply to attend a different type of appointment. Bring a correct list and explain any concerns to the prescriber in charge. A discussion of another approach is an opportunity to review the plan, not permission to change medicines without advice from your doctor. [4]
What should I bring to compare my options?
Bring your main questions, a symptom timeline, medicine and supplement details, and copies of key results or letters. Note what has helped, what has not and what you hope will change. This makes the talk more specific than choosing between general accounts of different medical approaches.
Make the next step clear
When you are ready, you can request an appointment. Confirm the scope and fee before booking. Discuss medical concerns with your usual healthcare professional.
London clinics: Great Portland Street and Chelsea.
Sources and further reading
- NHS: When to call 999. Accessed 30 September 2026.
- Association of the Functional Medicine Model of Care With Patient-Reported Health-Related Quality-of-Life Outcomes; M. Beidelschies, Marilyn Alejandro-Rodriguez, Xinge Ji, B. Lapin, P. Hanaway, M. Rothberg; 2019; JAMA Network Open; DOI 10.1001/jamanetworkopen.2019.14017. Accessed 30 September 2026.
- A functional medicine approach to diabetes control and quality of life: an open-label randomized pilot study; M. Eldib, Betul Hatipoglu, M. Beidelschies, Marilyn Alejandro-Rodriguez, Hui-Jun Xiao, Michael Rothberg, M. Hyman, Keren Zhou; 2026; Journal of Clinical & Translational Endocrinology; DOI 10.1016/j.jcte.2026.100437. Accessed 30 September 2026.
- GMC: Deciding if it is safe to prescribe. Accessed 30 September 2026.