Amanda Callenberg
Gut Health Nutritionist (BANT, CNHC)
“Personalised gut health support for women with persistent digestive issues - without rigid diets or overwhelm”
Amanda Callenberg, BANT & CNHC Registered Gut Health Nutritionist
London based • Supporting clients online across the UK
Living with ongoing gut issues can be exhausting. Bloating, reflux or unpredictable digestion can cause physical discomfort that disrupts day-to-day life, while restricting foods and anticipating flare-ups can create a cycle of stress and tension that is hard to escape.
Many people move between doctors, tests and diets, overwhelmed with information but without real clarity. Standard approaches look at digestion in isolation and rarely provide the specific expertise or ongoing guidance needed for lasting change.
Over time, chronic gut issues can begin to take over. You drop plans, monitor every meal, gradually lose trust in your body, and carry a constant mental load that never switches off. It is not just your gut that feels restricted, but your confidence, energy, and sense of freedom too. Unfortunately this very rarely resolves on its own.
If you want digestion to feel more predictable, food choices to feel less stressful, and life to feel easier again, lasting relief begins with viewing your gut as part of a bigger picture.
Expert Gut Health Specialist - Professor Tim Spector
The gut is closely connected to the rest of your body. Digestion is influenced by your energy levels, hormones, sleep, mood and how you respond to everyday challenges. This is why symptoms can fluctuate even when your diet stays the same, and why flare-ups can be triggered just as easily by a bad day, stress or pressure, as by food.
Nutritional Therapy gives a much wider context. As well as what you eat, it considers:
• How your digestion functions
• Your lifestyle
• Your sleep
• Your environment
• Your daily habits
When these factors are ignored, gut issues often repeat, leaving digestion unpredictable and daily life more restricted than it needs to be.
Through experience, I have found that lasting change happens when everything that influences digestion is looked at together. This includes the health of your microbiome, and how your body adapts to daily life.
This way of working, shaped by almost a decade of experience, is what I call the Mind Body Biome™ approach.
It brings together personalised nutrition, functional testing, and gentle, nervous system support that helps your body settle, so progress feels sustainable rather than overwhelming.
There’s rarely one single reason gut symptoms keep coming back.
By understanding what is influencing your digestion as a whole, you can move beyond constant guesswork and confusion, rebuild trust in your body, and create a clearer, more supportive path forward.
From there, we can choose the right support for your body and your gut at the right time, in a way that feels practical and personalised.
Sometimes the first step is simply helping symptoms calm down. Other times it’s about reducing daily stress on your system, or gently making changes once your body feels safer and more settled.
By noticing patterns and making small, sensible adjustments, we work with how your body responds, so your digestion and overall system can settle and relief can last.
This work is for women who are ready to stop guessing and start working with their body in a more informed, supported way
Renowned Physician & Compassionate Inquiry Founder - Dr Gabor Maté
This support is designed to give you clarity and ongoing guidance, with additional tools used only if and when they’re appropriate for you.
You can expect:
✔ Clear insight into what’s driving your symptoms
✔ Structure to help you build sustainable long-term habits
✔ Ongoing support with regular check-ins so you’re not navigating this alone.
✔ Practical tools to support your gut health
✔ Targeted supplements, when appropriate
✔ Advanced functional testing, if needed, with results explained simply and clearly
✔ A compassionate, ‘experience-informed’ practice, bringing depth and understanding to our time together
For my clients, the combination of nutritional expertise and tools to helping their system settle makes all the difference, and for some it also brings a gentle understanding of how emotional experiences can influence their health.
While many practitioners recognise that stress and mood affect digestion, most approaches stop at basic stress-management tools.
Integrating experience-informed care and Compassionate Inquiry allows the underlying patterns influencing symptoms to be explored gradually and safely over time, without forcing change.
Experience-informed care isn’t about reliving the past or finding something “wrong” with you. It simply means recognising that health and behaviour are shaped by experience, and working in a way that prioritises safety, choice and pacing.
Somatic awareness tools offers an additional lens, helping you notice physical sensations as useful signals, rather than symptoms to ignore or push through.
Compassionate Inquiry then provides a gentle framework for exploring these responses with curiosity rather than judgement, supporting regulation and release.
By understanding the whole picture. your nervous system, emotions and history, we create a supportive context for digestive healing, reducing stress-driven flare-ups and allowing nutritional and lifestyle changes to be applied in a way that doesn’t just manage symptoms, but creates meaningful and lasting change.
No quick fixes. No one-size-fits-all programs. This is structured, evidence-based gut health support that addresses every layer of your health.
Hi, I’m Amanda. I’m a London-based Registered Gut Health Nutritionist and Nutritional Therapist (BANT, CNHC),
I support people with: IBS, SIBO, IBD, bloating & reflux, food reactions, constipation & diarrhoea and stress-related gut issues.
Many of the women I work with have already tried generic paths and are looking for an approach that feels considered, tailored and sustainable. I offer highly personalised nutrition and lifestyle support, with the option to gently expand beyond this wherever it genuinely feels helpful.
My role is to create a path that feels clear, simple and manageable, while also giving you tools to process stress and reduce tension. Together, we restore balance and create the conditions for long-term gut health and lasting resilience.
For those ready for personalised support that goes beyond quick fixes, this is the next step
“I worked with Amanda for six months and the difference has been remarkable. Her tailored eating plan, supplement support and careful use of testing gave me insights I’d never had before. The results were genuinely startling” - Manny ⭐⭐⭐⭐⭐
“Amanda's guidance has been both practical and deeply supportive. I’ve seen genuine improvements in my energy, digestion and overall wellbeing, and for the first time nutrition feels simple, sustainable and actually enjoyable” - Peter ⭐⭐⭐⭐⭐
“My GP had struggled for years to get me a diagnosis or effective treatment. Amanda took the time to listen to my history and issues and within weeks, I saw a massive difference” - Martina ⭐⭐⭐⭐⭐
“What I love most about Amanda is her non judgmental approach, she provides me a safe space where I feel confident enough to open up to her and she compassionately takes the time to listen and understand anything I share” - Zahraa ⭐⭐⭐⭐⭐
Across my work, clients often describe similar shifts: as clarity increases, their symptoms begin to make more sense, and they notice internal changes both physically and emotionally.
Many report:
✔ Relief from bloating, discomfort & flare-ups
✔ Digestion that feels easier and more predictable
✔ Steadier energy and clearer focus throughout the day
✔ A more regulated nervous system and greater sense of calm
✔ Feeling more relaxed and confident around food
✔ Greater body confidence and ease in social situations
✔ Freedom to live life fully again, without constant restriction
“Health begins in the gut - but healing begins in the nervous system.”
It’s completely understandable. Many people with long-standing gut symptoms feel they’ve tried everything, every diet, every supplement, every specialist, yet still end up stuck in the same cycle of flare-ups and uncertainty. After years of being bounced between appointments without clear answers, it’s normal to feel discouraged.
My role is to help find the missing pieces of the puzzle.
As a registered Nutritional Therapist, I have access to advanced testing beyond what’s typically offered by a GP, which can reveal things often missed or dismissed in standard care. This work isn’t about blanket solutions, it’s about ongoing support, asking the right questions and understanding what’s truly driving your gut symptoms.
It’s far more than a generic meal plan or a ten-minute appointment; meaningful change takes time, patience, curiosity and compassion.
The discovery call is a relaxed space to talk through what’s been happening for you, your symptoms, challenges and what you’ve already tried. It’s less about me and more about understanding you, so we can begin to uncover what may be driving your gut symptoms or holding you back from feeling better.
If it’s helpful, I’ll offer some insight into where you’re at right now. From there, I’ll explain how I work, answer any questions you have, and together we’ll see whether it feels like the right fit. No pressure, just an open conversation about what could help you move forward.
Not always.
We begin by understanding your symptoms, health history and goals before deciding whether testing is necessary. Functional tests can offer deeper insight into gut health when the picture isn’t yet clear, but we only use them if they will genuinely support your progress, never as a requirement.
Q1: What is the difference between a gut health dietitian and a gut health nutritionist?
A: Many people search for a gut health dietitian or gut health nutritionist when looking for support with bloating, reflux or ongoing digestive symptoms. In the UK, "dietitian" is a legally protected title, while "nutritionist" and "nutritional therapist" are regulated through professional bodies such as BANT and CNHC. Dietitians typically work in medical settings and focus on clinical testing, diagnosis and medical nutrition interventions.
A gut health nutritionist takes a more holistic approach, using personalised nutrition, supplementation, lifestyle medicine and functional testing to address the root causes of digestive issues. As a registered Nutritionist and Nutritional Therapist (BANT, CNHC), my work combines these tools to support long-term gut health.
Q2: What is a gut health nutritionist, and how can they help with bloating or reflux?
A: A gut health nutritionist is a registered professional who specialises in digestive health. They support people with bloating, reflux, constipation and other gut symptoms by identifying food triggers, improving digestion and restoring microbiome balance.
As a qualified digestive health nutritionist, I use evidence-based strategies and functional testing when appropriate to understand what is driving your symptoms. A good gut health specialist looks beyond a simple meal plan and takes time to understand your history, lifestyle, stress patterns and the gut brain connection. This personalised and ongoing support is what makes long-term improvement possible.
Q3: Why work with a nutritionist specialising in gut health compared to, or alongside, my GP?
A: Your GP plays an important role, especially in ruling out serious conditions. However, GP appointments are often brief and focused on symptom management. A gut health nutritionist has the time to look deeper into your history, lifestyle, diet and stress patterns to understand what is driving your digestive symptoms.
While a GP may focus on diagnosis or medication, a gut health specialist provides personalised and holistic support that addresses underlying causes. The two approaches work well together. Medical care ensures safety, while nutrition therapy provides the depth needed for lasting digestive change.
Q4: Can I manage bloating or reflux on my own, or do I need a gut health nutritionist?
A: Many people try to manage gut symptoms on their own by changing their diet or using supplements, but results are often short-lived or inconsistent. A gut health nutritionist brings expertise in identifying root causes, using science-based strategies and applying functional testing when helpful.
They also provide a personalised plan and ongoing support that adapts to your lifestyle, stress patterns and changing symptoms. This type of guidance addresses diet, microbiome balance, the gut brain connection and nervous system support. These are key factors in achieving long-term digestive relief.
Q5: Do I need to have in-person consultations?
A: Not at all. Most clients work with me online and find it easier to stay consistent that way. As an online gut health nutritionist, I offer the same depth of support that you would receive in person.
Whether you are looking for a London gut health nutritionist or prefer to work from home, the process is the same. We explore your diet, microbiome and nervous system to understand what is driving your symptoms. You receive a personalised plan, targeted nutrition for gut repair and ongoing guidance, all with the convenience and comfort of home.
Your gut doesn’t need another quick fix.
It needs a personalised approach with the right tools and ongoing guidance that considers more - from digestion to nervous system regulation and emotional well-being.
If you’re tired of short-term solutions, or of trying to figure this out alone while symptoms continue to interrupt daily life, it may be time to explore what true support feels like.
If what you've read so far resonates, the most effective next step is to book a free call.
This call is for you if you’re ready to stop managing symptoms and finally understanding what your body has been trying to tell you.
If you’d like to learn more about me before booking a call, you’re welcome to read about my background and the inspiration behind my work, as well as explore detailed client testimonials.
amanda@amandacallenberg.com | +447984668090 | IG: @amandacallenberg
Before you head over, you may want to bookmark this page so it’s easy to come back to.
If you're curious about my work and interested in what it actually feels like, I offer a small number of FREE, standalone Somatic Compassionate Inquiry sessions each month.
This is not a call to discuss working together. It's simply a chance to personally experience this approach with time to reflect afterward.
