Amanda Callenberg - Gut Health & IBS Nutritionist - BANT & CNHC Registered
4.8 ⭐⭐⭐⭐⭐ Google Rated
Structured 1:1 nutrition support for persistent digestive issues when standard diet approaches haven’t worked.
A Free 30 Minute Call to asses what’s driving your symptoms and define next steps
✔ Clear insight into what is driving your symptoms
✔ A structured way to move beyond trial-and-error generic approaches
✔ Defined next steps based on your response, not guesswork
“I work primarily with people who’ve been dealing with disrupted digestion for months or years, and haven't seen reliable improvements despite making consistent changes”
Many people who arrive here describe a similar experience:
• Bloating, discomfort, or changes in digestion that build through the day
• Food reactions that feel unpredictable
• Symptoms improving for a while, then gradually returning
• Trying different diets, supplements, or protocols but still feeling stuck
• Analysing meals and symptoms, searching for patterns
• Avoiding certain foods, restaurants, or social plans
Over time, what begins as a digestive issue can start to affect far more than just food choices.
Chronic digestive symptoms involve multiple systems and when digestion is treated as a stand-alone problem, progress is very difficult and often short-lived.
Diet changes, supplements, and medications can reduce symptoms in the short term, but they rarely address why the gut remains reactive or why tolerance fails to improve over time.
Digestion is shaped by stress, sleep disruption, training load, illness, and prolonged pressure. These factors influence gut motility, sensitivity, immune signalling, and microbial balance. When they aren’t accounted for, flare-ups become inconsistent, unpredictable, and difficult to control.
Lasting improvement requires addressing digestion within the wider context of how the body is functioning, rather than relying on tighter dietary rules or repeated restriction.
This approach allows interventions to be sequenced correctly, reduces unnecessary trial and error, and creates conditions where dietary changes actually hold.
Expert Gut Health Specialist - Professor Tim Spector
Your gut doesn’t operate in isolation. Digestion is shaped by energy demands, sleep, recovery, stress, and daily load. Food matters, but it’s only one input.
When your system struggles to regulate under pressure, digestion becomes more reactive and less predictable. This is why symptoms fluctuate:
Even when diet stays the same
During poor sleep, travel, or illness
Under sustained work or training pressure
After long periods of restriction or overexertion
If digestion is treated on its own, these patterns are easy to miss. Progress comes from assessing gut function alongside the systems that influence it, not from tightening food rules.
This approach looks at three interacting areas:
The gut and microbiome – digestion, absorption, microbial balance
The body – energy availability, sleep, recovery, hormones, load
The nervous system – how your system responds to ongoing stress and pressure
When these are considered together, patterns become clear. Symptoms that once seemed unpredictable can be explained, targeted, and addressed systematically, rather than managed through trial and error.
Most people who arrive here already know food alone doesn’t explain their symptoms. They’ve changed what they eat, tried supplements, and followed plans, yet digestion still doesn’t stay consistent.
While my work is grounded in nutrition, results come from looking at how the whole system is operating. That includes daily physical demands, long-standing response patterns, and how your gut behaves under pressure, not just diet.
This short quiz helps identify what’s most likely driving your symptoms right now. Whether the priority is stabilising digestion, reducing reactivity, or addressing deeper nervous system patterns, it gives you a clear and practical starting point.
2 minutes · no email required
Finding the right support
Most people arrive here after plans or appointments that didn’t adapt to them. Generic advice, rushed calls, and simplified solutions that failed to reflect how their symptoms actually behave.
This is different.
This is fully personalised, 1:1 gut health support, and one of the most comprehensive approaches in the UK.
Most clients receive 10+ hours of direct, individual support through live 1:1 online calls.
There is rarely one single reason gut symptoms keep returning. Persistent symptoms usually reflect multiple inputs acting on the system at once.
The Mind Body Biome approach brings together personalised nutrition, functional testing, and targeted lifestyle and nervous system strategies to assess digestion as part of a wider system.
The starting point depends on what your body needs first:
Stabilising symptoms and reducing reactivity
Repairing gut function and improving tolerance
Reducing daily load and improving regulation under pressure
From there, decisions are made based on how your system responds, not on fixed timelines or generic protocols.
Changes are targeted, measurable, and adjusted as needed, allowing digestion to become more consistent and predictable over time.
This removes guesswork, reduces unnecessary restriction, and provides a clear direction forward.
Let’s talk through your concerns and what’s been keeping you stuck
During the call, if you feel we’re a good fit, I’ll explain how I work. If not, you’ll leave with clarity and no pressure to continue
Renowned Physician & Compassionate Inquiry Founder - Dr Gabor Maté
This approach provides structured, personalised gut health support, with tools used only when they add value.
You can expect:
✔ Clear insight into what’s driving your symptoms
✔ Practical strategies you can apply day to day
✔ Defined structure and ongoing oversight
✔ Adjustments based on response, not theory
✔ Targeted supplements where appropriate
✔ Advanced functional testing when it’s clinically useful, with results explained clearly
✔ An experience-informed approach that adds depth and precision to decision-making
For most clients, this combination removes guesswork and allows progress to be measured, adjusted, and sustained.
Ongoing digestive issues often place the nervous system into a state of constant alert.
This can lead to heightened gut sensitivity, inconsistent reactions to food, and symptoms that persist even when nutrition is dialled in.
Over time, this state interferes with digestion itself, limiting how well the gut responds to dietary or lifestyle changes.
Most practitioners acknowledge that stress affects digestion, but interventions usually stop at basic stress-management tools.
Integrating experience-informed care and Compassionate Inquiry allows these patterns to be identified and addressed at the level they operate, rather than worked around. This reduces ongoing nervous system activation, removing a common barrier to digestive improvement.
Experience-informed care does not involve revisiting the past or searching for fault. It recognises how the body adapts under pressure, and works with those adaptations so they no longer drive symptoms.
Somatic awareness tools add a practical layer, helping physical signals be used as information rather than triggers.
Compassionate Inquiry provides a framework to examine these responses and release unnecessary tension.
By addressing digestion, nervous system regulation, and long-standing adaptive patterns together, nutritional and lifestyle strategies can be applied in a way that supports real stability, not short-term symptom control.
If you’ve been dealing with digestive issues for a while and want personalised support that looks beyond symptoms, this is the next step
“No quick fixes. No one-size-fits-all programs. This is structured, evidence-based gut health support that addresses every layer of your health.”
I work with people dealing with persistent digestive issues such as IBS, bloating, reflux, constipation, diarrhoea, and stress-related gut symptoms.
Most clients I support have already tried standard approaches and are looking for a more precise, structured way forward.
This work is suited to you if:
Your symptoms have persisted despite dietary changes
Your digestion feels reactive, inconsistent, or hard to predict
You want decisions based on evidence and response, not guesswork
You’re prepared to take a systematic approach rather than chase quick fixes
My role is to assess what’s driving your symptoms, identify where the system is under strain, and apply nutrition and lifestyle strategies in a way that produces measurable, sustainable change.
“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 ⭐⭐⭐⭐⭐
If you recognise yourself in this approach and are serious about changing how your gut issues affects your life, it starts below.
As clarity increases, symptoms become more predictable and easier to manage.
Clients commonly report:
✔ Fewer flare-ups and less symptom volatility, even during busy or stressful periods
✔ Digestion that holds under real-life conditions (workload, travel, disrupted routines)
✔ Steadier energy and mental clarity without relying on constant restriction
✔ Improved food tolerance and fewer reactive decisions around eating
✔ Clearer decision-making about what to change and what to ignore
✔ Less time and energy spent managing symptoms, with more capacity for daily life
The aim is not symptom suppression, but durable improvements that hold under normal life demands.
“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 does not need another quick fix.
It needs a personalised approach, the right tools, and clear guidance that looks beyond diet alone. That means considering gut function, daily load, and how your system responds under pressure, not just food choices.
If you’re tired of short-term improvements or trying to piece this together on your own while symptoms continue to interfere with daily life, the next step is to explore what real support feels like and book a free call.
This is a structured conversation to identify what’s driving your symptoms and whether my approach is the right fit for you.
You’ll leave with clear next steps, whether we decide to work together or not.
Once I receive your enquiry, I’ll contact you to arrange your Gut Health Clarity Call.
The call is a structured conversation to understand your symptoms, current challenges, and what hasn’t worked so far.
We’ll identify what’s keeping you stuck and where to focus first.
You’ll leave with clear next steps, whether or not we decide to work together.
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
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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.
