PCOS dietitian in London: a plan built around insulin, not willpower
Most PCOS advice is either “just lose weight” or a list of foods to be afraid of. Here you get a 3-month eating plan built around your insulin, your cycle and your life — checked and adjusted every month by your own dietitian.
Raquel Britzke and her team are HCPC-registered dietitians supporting women with polycystic ovary syndrome — at any weight, trying to conceive or not — from the clinic at 33 Cavendish Square, Marylebone, in the Harley Street medical area, and online across the UK.
See the PCOS programme Take the 60-second quiz
- ★★★★★ 4.9/5 from 600+ Google reviews
- HCPC-registered dietitians
- 20,000+ patients supported
- 18+ years of clinical practice
Clinically reviewed by Raquel Britzke, Registered Dietitian (HCPC DT28960) · Last reviewed September 2026
To be clear about what we do: we are a nutrition service. We do not diagnose PCOS — that is done by your GP, gynaecologist or endocrinologist using the Rotterdam criteria — and we do not prescribe metformin, the contraceptive pill, fertility medication or any other treatment. We work alongside the clinicians who do, and we look after what you eat, how you move and how it fits your life.
Why nutrition matters here
PCOS is a metabolic condition, not just an ovarian one
Polycystic ovary syndrome affects around 12% of adult women, according to the pooled estimate in the 2023 International Evidence-based Guideline for PCOS, led by Monash University. It is usually described by its most visible signs — irregular periods, acne, excess hair, difficulty getting pregnant — but underneath many of them sits insulin. Clamp studies cited in that guideline found insulin resistance in 75% of lean women with PCOS and 95% of those with a higher BMI. Extra weight makes it worse; it does not cause it. Higher insulin pushes the ovaries to make more androgens, which is why the symptoms tend to travel together.
That is why the guideline recommends lifestyle intervention — healthy eating, physical activity and behavioural support — for all women with PCOS, as a core part of management alongside any medication. It is also honest about something most PCOS diet books are not: there is no evidence that any one diet composition is better than another. What works is balanced eating that fits your preferences and that you can keep up for years, not weeks.
Where weight is higher, modest change goes a long way: the same guideline notes that losing as little as 5% of body weight has shown metabolic, reproductive and psychological benefits, and we usually work towards 5–10% at a pace you can hold. Where weight is not the issue, the work is insulin sensitivity, muscle, steady energy and long-term health. In the guideline’s own words, there are benefits to a healthy lifestyle even in the absence of weight loss.
A note on the name: in May 2026 an international consensus published in The Lancet renamed the condition polyendocrine metabolic ovarian syndrome (PMOS), and the NHS website now uses it. We use PCOS here because it is still the name most people know.
Six things that make the difference with PCOS
Insulin, one meal at a time
The core of an insulin resistance PCOS diet is structure, not restriction: protein and fibre at every meal, lower-glycaemic carbohydrates such as wholegrains, pulses, vegetables and fruit, eaten with the rest of the meal, and a regular rhythm instead of long gaps followed by a crash. Carbohydrates stay. They just stop arriving on their own.
Muscle is metabolic
Muscle is one of the main places your body puts glucose, so building it improves insulin sensitivity. The 2023 guideline recommends muscle-strengthening activity on two non-consecutive days a week, alongside at least 150 minutes of moderate activity. We plan something you will actually do, and track muscle on the Tanita so you can see it working.
Weight, without shame or crash diets
If weight loss is one of your goals, we plan a realistic energy deficit and a steady pace. If it is not, we leave the scale out of it. We never use crash diets: body-image distress and disordered eating are more common in PCOS, whatever your weight, and the guideline warns against unduly restrictive, unbalanced diets.
Cycles and fertility
Better insulin sensitivity and, where relevant, modest weight loss can support more regular ovulation. If pregnancy is on your mind, we get the preconception basics right, folic acid included. Nutrition supports fertility; it does not treat infertility. We work alongside your GP, gynaecologist or fertility clinic, never instead of them.
Skin, hair and androgens
Acne, unwanted hair and scalp thinning are driven by androgens, and insulin feeds them: high insulin raises androgen production and lowers SHBG, the protein that keeps testosterone in check. Improving insulin sensitivity can help over months rather than weeks. Medical and cosmetic treatments stay with your GP or dermatologist.
Long-term health and screening
PCOS raises the risk of type 2 diabetes, high blood pressure and cardiovascular disease (NHS), and the diabetes risk applies regardless of age and BMI. The 2023 guideline recommends checking glycaemic status at diagnosis and every one to three years. We review your bloods, tell you what to ask your GP for, and plan for the long run.
You are in the right place if…
- You have a PCOS diagnosis and were told to “just lose weight”, with no plan attached.
- You are not overweight, you have PCOS, and you want to know what to eat for insulin resistance.
- Your cycles are irregular and you want food working with your doctor’s plan, not against it.
- You are planning a pregnancy, or already with a fertility clinic, and want your nutrition in order.
- You take metformin or the pill and want the food side handled properly.
- You live with cravings, energy crashes after meals, or weight that no longer responds to what used to work.
- You have tried keto, fasting or a PCOS “protocol” and ended up tired and fed up.
- Your bloods show a raised HbA1c, glucose or cholesterol and you want to act on it.
Four steps
Tell us where you are
Take the 60-second quiz or book a free 15-minute call. If you do not have a diagnosis yet, or another programme suits you better, we will say so.
First consultation
Your cycles, symptoms, medication, what you eat and what you have tried. Bloods if you have them — HbA1c, glucose, lipids, hormones. At the clinic, a Tanita MC-780U body-composition analysis so we track muscle and fat, not just weight.
Your plan, adjusted monthly
Personalised meal plans in the Nutrium app, a shopping list, a realistic movement plan and unlimited email and app support. Each month we look at what changed and adjust.
Maintenance and discharge
You leave with a plan to keep going on your own, what to re-check with your GP and when, and how to adapt it if you start trying to conceive or your medication changes.
PCOS Metabolic Reset — 3 months with your own dietitian
For women with a confirmed PCOS diagnosis who want an evidence-based plan for insulin resistance, cycles, energy and, where relevant, weight — without a crash diet or a list of banned foods.
Online
£750
3 months · or 3 monthly payments of £279
- Monthly consultation with your dietitian
- Fully personalised PCOS diet plan and meal plans
- Lower-glycaemic, protein-and-fibre meal structure
- Movement plan with resistance training
- Review of your bloods and what to ask your GP to check
- Nutrium app, eBook & shopping list
- Unlimited email & app support
Prefer to pay monthly? 3 × £279
London clinic
£850
3 months · or 3 monthly payments of £329
- Everything in the online programme
- In-person consultations at 33 Cavendish Square, Marylebone
- Body-composition analysis at every visit
- Optional DNA diet and food intolerance testing
Prefer to pay monthly? 3 × £329
Not sure this is the right programme? The 60-second quiz will tell you. All our prices are on the packages & pricing page, and optional testing is explained on the tests page. Nutrition support only — we do not diagnose PCOS or prescribe medication.
Rated 4.9/5 by patients in London and online
4.9/5
★★★★★ from 600+ Google reviews
More than 20,000 patients supported over 18+ years of clinical practice, in the clinic and online.
Regulated, and easy to check
Every dietitian on the team is registered with the HCPC. Raquel Britzke is HCPC-registered (DT28960, listed as Raquel Britzke Tezone) and a member of the British Dietetic Association. You can check the register yourself before you book.
Diagnosed already — or still looking for answers?
The PCOS Metabolic Reset is built for women who already have a diagnosis. If you are still at the symptoms stage, there is a better first step.
You have a confirmed PCOS diagnosis
You are in the right place. The PCOS Metabolic Reset is built around your diagnosis, your bloods and your goals, over three months.
You have symptoms but no diagnosis yet
Irregular periods, acne, excess hair and weight gain have several possible causes, so see your GP first — only a doctor can arrange the tests and make the diagnosis. Meanwhile, a Personalised Clinical Review (one consultation plus a written plan, £279 online or £329 at the clinic) gives you a dietitian’s view of your eating, your symptoms and what to ask your GP.
Over 40 and noticing perimenopause changes on top of PCOS? The Hormonal Reset 40+ may suit you better — see our menopause dietitian page or all our women’s health services. If PCOS is not the issue and weight is your main goal, start with our weight loss programmes.
PCOS and nutrition: your questions
How much does a PCOS dietitian cost in London?
The PCOS Metabolic Reset is a 3-month programme: £750 online (or 3 monthly payments of £279), or £850 at our London clinic in Marylebone (or 3 monthly payments of £329). That covers a monthly consultation with your dietitian, personalised meal plans, the Nutrium app and unlimited email and app support between appointments. If you would rather start with a single appointment, the Personalised Clinical Review — one consultation plus a written plan — is £279 online or £329 in the clinic. Every price is listed on our packages and pricing page.
Do I need a PCOS diagnosis before I book?
For the PCOS Metabolic Reset, yes. PCOS is diagnosed by a GP, gynaecologist or endocrinologist using the Rotterdam criteria, as refined in the 2023 international guideline: two of irregular or absent ovulation, signs of raised androgens (on examination or a blood test), and polycystic ovaries on ultrasound — or, in adults, a raised AMH blood test instead — once other causes have been ruled out. If you have symptoms but no diagnosis, see your GP and book a Personalised Clinical Review with us in the meantime. We can help with food; we cannot diagnose.
Can a dietitian help with PCOS if I am not overweight?
Yes. Many women with PCOS are not overweight — this is sometimes called “lean PCOS” — and insulin resistance is still common: clamp studies cited in the 2023 guideline found it in 75% of lean women with PCOS. For you, weight loss is not the goal. We work on insulin sensitivity through meal structure and muscle, on steady energy, cycle support and long-term risk, and we make sure you are not cutting out foods you do not need to cut out. Body-composition analysis shows changes in muscle and fat that the scale would miss.
What is the best diet for PCOS?
There is no single best one, and anyone selling you one has not met you. The 2023 International PCOS Guideline found no evidence that any one diet composition is better than another — low-carb, Mediterranean, high-protein or otherwise. What helps consistently is a balanced pattern you can keep: protein and fibre at every meal, lower-glycaemic carbohydrates such as wholegrains, pulses, vegetables and fruit in place of refined ones, regular meals, and fewer sugary drinks and ultra-processed foods. A good PCOS diet plan is one built around your food, your culture and your week.
Can nutrition help me get pregnant with PCOS?
It can support fertility, but it does not treat infertility, and we will not pretend otherwise. Where weight is higher, even modest weight loss can help ovulation become more regular, and good nutrition before conception matters for you and for the pregnancy — including folic acid, which the NHS recommends for everyone trying to conceive (some women are advised a higher dose, so check with your GP). If you are trying for a baby, you should also be under the care of your GP, gynaecologist or fertility clinic. We work alongside them and fit the plan around any treatment.
Should I take inositol or other supplements for PCOS?
Possibly, but not by default. The 2023 guideline says inositol could be considered as a personal choice: it carries limited harm and may improve some metabolic measures, but shows limited clinical benefit for ovulation, excess hair or weight, and no specific type or dose can yet be recommended. Evidence for vitamin D and omega-3 in PCOS is mixed, although the NHS advises everyone in the UK to consider 10 micrograms of vitamin D a day in autumn and winter. We recommend supplements only where there is a clear reason, and we check they sit safely alongside any medication you take.
Can you help if I take metformin or the pill?
Yes. Many of our PCOS patients take one or both, and nutrition works alongside them rather than instead of them. Stomach side effects from metformin are common at first, and the way you structure and time your meals can make it easier to live with. Long-term metformin can also lower vitamin B12 levels, as the 2023 guideline notes, so we look at your intake and tell you when to ask your GP about a check. We never advise starting, stopping or changing medication — those decisions stay with your GP or specialist.
How long before I see changes?
Honestly, weeks for some things and months for others. Energy, cravings and how steady you feel after meals often shift within the first few weeks of a new meal structure. Cycle changes, if they come, take longer, because each cycle is a month long. Skin and hair are slowest, over many months. HbA1c reflects roughly the previous two to three months of blood glucose, which is one reason the programme runs for three. Results vary between individuals, and we do not promise any particular outcome.
Online or in the clinic — which is better for PCOS?
Both work well. The online programme has the same consultations, meal plans, app and support, and it is what most of our UK-wide and international patients choose. The London clinic at 33 Cavendish Square, in the Harley Street medical area of Marylebone, adds in-person consultations, body-composition analysis on the Tanita MC-780U at every visit — useful when you are building muscle and the scale barely moves — and optional DNA diet and food intolerance testing. Choose whichever you will actually keep turning up to.
Dietitian or nutritionist for PCOS — does it matter?
It does. “Dietitian” is a protected title in the UK; “nutritionist” is not, so anyone can use it. Dietitians are regulated by the HCPC and trained to work with medical conditions, blood results and medication. So if you are searching for a PCOS nutritionist in London, a registered dietitian is usually what you actually need. You can check any of our team on the HCPC register — Raquel Britzke is DT28960, listed as Raquel Britzke Tezone.
Does private health insurance cover a PCOS dietitian?
Some policies cover dietetic input, particularly for a diagnosed condition such as PCOS, and some ask for a GP or specialist referral first. We can provide an invoice with the details your insurer needs to process a claim. Cover varies a great deal between insurers and policies, so check with yours before you book — including any limit on outpatient sessions, and whether a 3-month programme fee is claimable or only individual consultations.
Can I combine this with a GLP-1 medication?
Yes, if it has been prescribed for you. Some women with PCOS are prescribed semaglutide or tirzepatide for weight management. We do not prescribe, supply or adjust these medicines, but we make sure you eat enough protein, keep your muscle and manage side effects. Two things to raise with your prescriber: the MHRA advises against GLP-1 medicines if you are pregnant or trying to conceive, and Mounjaro may make the oral pill less reliable in people who are overweight. If medication is central to your plan, see our GLP-1 dietitian page.
Sixty seconds to find the right starting point
Answer a few questions and we will tell you whether the PCOS Metabolic Reset, a one-off Clinical Review or a different programme fits — including whether you need one at all.
Take the 60-second quiz Book a free 15-minute call
Nutrition programmes are provided by HCPC-registered dietitians and do not replace medical care. We do not diagnose PCOS, and we do not prescribe, supply or adjust medication, including metformin, hormonal contraception and fertility treatment. Never change or stop a prescribed treatment without the clinician who prescribed it. Outcomes vary between individuals and are not guaranteed. 33 Cavendish Square, London W1G 0PW · +44 20 7123 8488 · assistant@raquelbritzke.com