The Sourdough School

BREAD COURSES || NUTRITION TRAINING || DIGESTION ANALYSIS || PERSONALISED BREAD

BAKING WITH THE HANDS OF AN ARTISAN AND THE MIND OF A CLINICIAN

Discover Baking as Lifestyle Medicine, and how to bake Proven Bread, from the walled gardens of Dr Vanessa Kimbell's beautiful Victorian home in rural Northamptonshire, where we train healthcare professionals, teach bakers, and support individuals to bake personalised bread using nutrigenetics and gut health assessments.

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VANESSA KIMBELL BREAD ON TH TABLE
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Online Diploma in Nutrition and Digestibility of Bread 2026

From: £59.99 / month for 24 months + £1,500.00 registration fee

The two-year Diploma Baking as Lifestyle Medicine – the most powerful clinical tool you  will ever work with isn’t a supplement or a protocol, but a loaf of bread and you will know know how to Biohack your bread to support human biology itself.

BAKING WITH THE HANDS OF AN ARTISAN AND THE MIND OF A CLINICIAN

DESIGNING BREAD FROM YOUR OWN BIOLOGY

COURSE STARTS:  6th January 2026  
STRUCTURE: A personalised genetic report examining your unique relationship with bread, digestion and nutritional requirements, consultation and one year following the syllabus. Year 2 research, create, and present your BALM Personalised bread graduation recipe.
REGISTRATION FEE: £1500 upwards
TUITION FEES £59.99 per month upwards for 24 months
DURATION: 2 academic years – Each year is 3 10-week terms
HOURS: Live sessions on Tuesday Evenings 1.5 hours + Weekly Baking & Lifestyle Medicine Tasks
LOCATION: Online
WHY? Personalise Bread – for your community, to teach, or to prescribe Proven Bread.  This is an evidence-based baking as lifestyle medicine course and approaches bread and baking as functional nutrition.  BALM  also aligns with nutritional psychiatry.
HIGHLIGHTS: a Personalised Programme using your genetics to learn as self enquiry.  Connecting to the community with a 2 day Sourdough exchange in person at The Sourdough School +  wonderful  live weekly support sessions to help you  apply knowledge to yourself as you learn. Real life case studies and  practical baking application of the theory through the weekly baking that keeps you engaged. Evidence based with over 800+ papers in a searchable bespoke research database.
START DATE:  January 2026

SCHOLARSHIPS & BURSARIES: Now Closed  

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SKU: N/A Categories: BALM Diploma, Courses, Featured, Online Only, The Diploma
  • Description
  • What the Research Showed
  • What is Nutrigenetics?
  • Who This Bread Particularly Supports

‘Vanessa’s work on sourdough and the gut microbiome is changing the way we think of food, health and baking.’– Professor Tim Spector, Founder of Zoe


A Comprehensive Online training programme in Nutrition and Digestibility of Bread

Duration: 2 years
Total Live Q & A Sessions: 30 Live sessions (Over 3 terms) held on Tuesday evenings. ( Year 1  – 6pm – 7:15pm || Year 2  – 7:30pm – 8:45pm)
Terms:  Spring, Summer Autumn, – our live sessions follow a traditional term timetable so you have breaks for Christmas, Easter, half terms and summer holidays
Self-Paced Learning: Structured support to keep students on track, but flexible to accommodate varying schedules

  • This is a two-year immersion for professionals who want to understand bread in its fullest context: cultural, agricultural, biochemical and clinical. You learn to bake with the hands of an artisan and think with the precision of a clinician — using bread as both nourishment and a functional tool for health.
  • Fermentation becomes the thread that connects everything: soil, micronutrients, gut ecology, neurobiology and behaviour. You begin to see bread not as a recipe, but as a system — a living interface between the land, the microbiome, and the human experience.
  • Using your own Lifecode GX Nutricore test, you learn to design bread for your biology. You work directly with gene variants influencing methylation, energy production, detoxification pathways and metabolic resilience. This is where baking becomes evidence-based practice.
  • You learn to bio-design bread, understanding the gut as the biochemical pantry that feeds every cell. You create loaves that nourish from the inside out — and you come to understand that each decision you make (the grain, the fermentation, the botanical components) shapes both physiology and the broader food ecosystem.
  • By the end, you formulate your own personalised bread: a loaf that expresses your learning and reinforces the central principle of BALM — that bread, made with knowledge and intention, becomes an instrument of lifestyle medicine.
  • This programme can be taken on its own or combined with an in-person workshop or retreat.

This course can be booked as a stand-alone course or alongside an in-person workshop or retreat.

 

THE THREE MODULES OF THE DIPLOMA IN BAKING AS LIFESTYLE MEDICINE –

YEAR 1 MODULE 1 FERMENTATION AS THE BRIDGE BETWEEN SOIL, GUT, BRAIN, AND BEHAVIOUR

— The art of fermentation 

Understanding baking as a living system
This module explores the full craft and science of sourdough baking — the art of fermentation, time, temperature, and transformation.
Students learn to work farmers, explore soil and the relationship with nutrition, and work with with wild yeast and lactic acid bacteria, developing and maintaining healthy starters and understanding the microbial ecology that underpins great bread.
Through hands-on weekly baking tasks you build the knowledge throughout the course and master artisan baking skills with core knowledge for mixing, shaping, scoring, and baking a wide range of bread and baked goods including: advanced high hydration boules, baguettes, brioches, pizzas, sourdough pasta, sweet bakes and fermented pastries. 

Alongside these technical skills, students bake to nourish the gut and create incredible flavours – milling and creating botanical blend flours and diverse grains and botanicals, learning how grain variety, fibre, and fermentation affect both flavour and digestibility.

The aim is to bake with the sensitivity and precision and skill of an artisan baker — bringing together baking science, craft, and nourishment to fully understand bread as a living, responsive system deeply connected to human health.

YEAR 1 MODULE 2 WHERE ARTISAN CRAFT MEETS CLINICAL UNDERSTANDING

— Nutrition, Digestibility and the Gut Microbiome

BAKING IN A WAY THAT FEEDS THE MICROBIOME AND THE MIND

This module examines how what we bake and eat influences the gut microbiome, digestion, and mental wellbeing. Drawing on Dr Kimbell’s doctoral research into Baking as Lifestyle Medicine (BALM), students study the evidence linking fermentation, fibre diversity, and botanical blends to improved digestive and psychological health.

The curriculum covers the nutritional composition of grains and flours including vitamins and minerals; the role of fermentation, fibre and short-chain fatty acids; and how probiotic and prebiotic foods support microbial balance, neurotransmitter production, and emotional regulation. Core topics include Blood sugar management, Stress and the impact on your gut, IBS, IBD, bowel cancer prevention, non-coeliac gluten sensitivity, and micronutrient metabolism.

Students also explore the emerging field of nutritional psychiatry, learning how gut–brain communication and neurotransmitter synthesis connect diet to mood and cognitive function. Through research-led discussion, reflective practice, and clinical context, this module provides the scientific foundation for understanding bread as preventative and therapeutic medicine.

YEAR 2 MODULE 3 — Personalisation of Bread and Nutrigenetics

Applying genetics and gut insight to personalised breadmaking

This advanced module integrates nutrigenetics, digestive health, and baking practice. A single, integrated syllabus that brings together nutrigenetics, gut health, and baking practice.
Each week explores a clinical or genetic context — for example, MTHFR, COMT, DAO, or digestive conditions such as IBS — and applies that knowledge through a corresponding bread formula or dietary strategy.

As part of the module, students complete a Nutrient Core genetic test to personalise their learning. The analysis highlights key gene variants linked to digestion, vitamin metabolism, detoxification, inflammation, and appetite control. The results are used to inform both dietary understanding and baking design, demonstrating how genetic individuality can shape the function and therapeutic potential of bread.

In the final stage of the Diploma, each student creates their own personalised bread — a practical expression of scientific insight, technical skill, and the BALM Protocol in action.

and learn how genetic polymorphisms and microbiome profiles influence digestion, metabolism, and neurotransmitters — and how to adapt bread formulas accordingly.
The focus is on translating genetic insight into practical, prescribable formulas, creating bread that supports specific physiological, emotional, and social needs.

In the second year, to graduate, students complete the Diploma by designing and baking their own personalised bread — an integrated expression of their learning that demonstrates both technical skill and an applied understanding of the BALM Protocol.
This final bake forms the centrepiece of their assessment and celebrates the synthesis of science, fermentation, and clinical insight.

THE SOURDOUGH SCHOOL EXCHANGE

8–9 July 2026  |  Included in your Diploma (This is an option in person 2 day event is held for registered Alumni and current students at The Sourdough School in Northampton )

Each summer we open The School for The Sourdough School Exchange — a relaxed two-day gathering for Diploma students and Alumni.
It’s a time to bake, share, and experience The School in person, bringing our online learning into a real, sensory space.

This community optional in-person module celebrates the community at the heart of the Diploma.
Students and Alumni bring loaves to share, eat together in the garden, and take part in relaxed talks, tastings, and collaborative baking sessions exploring fermentation, nutrition, and digestibility.
The atmosphere is generous and unhurried — part celebration, part reflection, and a true embodiment of the BALM philosophy of baking, eating, and sharing bread as lifestyle medicine.

Attendance is included within your Diploma or Alumni membership.
It’s one of the most memorable parts of the programme — a chance to connect face-to-face, share knowledge, and experience the living culture of The Sourdough School.

Who Should Attend This Course?

Bakers: Professional and Domestic
This course is ideal for both professional and home bakers who are passionate about creating nutritious, environmentally sustainable bread that nourishes their communities. Participants will gain an in-depth understanding of the science behind bread making, including its nutritional benefits and impact on health. By learning to craft personalised bread, bakers can differentiate their offerings, support customer wellness, and enhance the overall quality of their products.

Healthcare Professionals
Healthcare providers, including GPs, dietitians, physiotherapists, and frontline staff, will find this course invaluable for integrating baking into preventive healthcare. By understanding the therapeutic benefits of bread making, professionals can use bread as a form of lifestyle medicine. This approach can enhance patient care, support mental well-being, and promote gut health, making it a powerful tool in healthcare settings.

Anyone Interested in Lifestyle Medicine
For those interested in the broader implications of food on health and well-being, this course provides the knowledge and skills needed to use bread as a means of promoting wellness. Dr. Kimbell’s research and the BALM Protocol offer insights into how personalised bread can positively impact both physical and mental health, transforming bread from an ultra-processed food into a nourishing staple. Whether you aim to improve personal health, support community wellness, or contribute to the field of lifestyle medicine, this course equips you to make a meaningful impact.

The BALM Protocol: Baking as Lifestyle Medicine

Dr. Kimbell’s research highlights the transformative power of bread through the BALM Protocol. This innovative approach focuses on using diverse, personalised bread recipes to support gut health and mental well-being. The course draws on findings from dietary intervention studies that show a positive impact on the gut microbiome and mental health, making it relevant for healthcare professionals and bakers alike who want to improve the health of their community.

  • Request a callback.

_______________________________________________________________________________________________________________

‘Vanessa’s approach to baking nourishes both the gut and the mind.’
– Dr Michael Mosley

‘This is a journey. And these aren’t just courses. Kimbell wants to change the bread we eat, one loaf at a time. She’s the real deal: a total inspiration.’
– Diana Henry, the Telegraph.

LEARNING TO BAKE IN A WAY THAT CHANGES HOW YOU FEEL AND FUNCTION

Sourdough Boule 10 Minutes

What the Research Showed

It took ten years. A group of people who refused to accept the status quo. And documented evidence — microbial, symptomatic, biochemical — proving that a loaf of bread, formulated with intention, can meaningfully change human physiology. The food industry said it was impossible. Turns out it wasn’t

What the Research Showed

I want to be transparent about what my doctoral research found. These were small-scale dietary intervention studies — not large clinical trials — but the results were consistent and, in some cases, remarkable. The kind of results that made reviewers pause.

Microbiome changes

(measured via stool testing over 12 weeks)

All participants in the study showed positive changes to their gut microbiome.

In one participant, Akkermansia — a bacterium associated with gut barrier health and metabolic regulation — increased by 4,950%.
Butyrate-producing bacteria, which support gut lining integrity, increased in 44% of participants.

They said you can’t shift the microbiome meaningfully through bread.
The data disagreed.

Self-reported improvements

Participants tracked their own symptoms throughout the 12 weeks:

• 87.5% reported significant overall improvement
• 89% reported clinically significant improvements in mental health measures
• 44% reported improvements in digestive symptoms
• 33% reported improvements in sleep quality

When looking at specific symptoms, participants reported:

• 83% reduction in sleep problems
• 75% reduction in constipation
• 75% reduction in indigestion
• 71% reduction in stress
• 63% reduction in inflammation-related symptoms
• 100% resolution of headaches (in those who reported them)
• 167% improvement in feelings of satiety

These are self-reported outcomes from a small participant group. Individual results varied, and this bread is not a treatment or cure for any medical condition. But these numbers exist. They happened. They were documented.

Individual clinical markers

Some participants also tracked clinical measurements with their healthcare providers. Individual outcomes included:

• One participant lost 7 kg over 9 weeks while eating 300 g of bread daily
• One participant’s blood pressure dropped from 137/89 to 126/66
• One participant reversed a pre-diabetes diagnosis within 12 months
• One participant’s eczema visibly healed over 8–10 weeks

These are individual case outcomes, not guaranteed results. But they are real outcomes from real people eating real bread — the kind of outcomes that aren’t supposed to come from a loaf.


What Makes This Bread Different? The science

Laboratory analysis conducted as part of my doctoral research compared PROVEN™ Bread with standard white and wholemeal loaves:

• Nearly 3× more polyphenols than wholemeal bread
• 8× more polyphenols than white bread
• 2× the antioxidant activity of wholemeal bread
• 3× the antioxidant activity of white bread
• 10 unique polyphenols not found in standard bread
• Contains caffeoylcholine — a compound not detected in white or wholemeal bread

These compounds emerge from the botanical blend, the heritage grains and the long fermentation process. This is what I mean when I call it biohacked bread: fermentation is creating beneficial compounds, not merely preserving what was already there.

They said bread is just bread.
They were wrong.

What is Nutrigenetics?

What is Nutrigenetics?

What is Nutrigenetics?

Nutrigenetics is the science of how your genes influence the way you process and use food. It helps us understand why one person thrives on certain ingredients while another struggles — why bread might leave one person energised and nourished, and another bloated, tired, or inflamed.
How do we use it?
At the School, nutrigenetics is never abstract: we use your genetic insights to adapt the bread you eat and bake. By understanding how your body handles nutrients, detoxification, inflammation, and digestion, we can personalise everything — from fermentation time to flour choice — so that bread works with your biology, not against it.
Why it matters
This is bread tailored to you. Instead of trial and error, nutrigenetics gives us a clear, evidence-based blueprint to recommend the kind of bread that best supports your health — practical, delicious, and deeply personal.

Who This Bread Particularly Supports

Dr Vanessa Kimbell’s work in nutrigenetics, mental health and gut health informs every element of this bread’s design. from 30+ ingredients, the long fermentation to that feeling of empowerment, knowing every slice supports soil, farmers, and your gut microbiome.

Proven Bread™ was formulated for people who need more than just sustenance: for those seeking a therapeutic relationship with bread that nourishes both body and mind.

Dr Vanessa Kimbell’s work in nutrigenetics, mental health and gut health informs every element of this bread’s design. The formula have been designed with  fibre, fermentation and botanical diversity.

Vanessa has particularly worked on this being supportive for individuals living with:
• neurodivergence (including ADHD, autism and anxiety)
• MTHFR polymorphisms or impaired folate (B9) metabolism
• B-vitamin insufficiency affecting energy and neurological steadiness (with a primary focus on folate-related pathways)
• blood-sugar instability or energy crashes
• histamine sensitivity
• mood dysregulation linked to the gut–brain axis• digestive discomfort, including sluggish digestion, constipation or post-antibiotic dysbiosis
• recovery from ultra-processed food diets or restricted eating patterns

This is bread that pays attention to how your system functions — particularly if your system doesn’t fit neatly within the “norm”.

It was developed to provide naturally occurring, highly bioavailable folate (B9); to support steadier post-prandial blood-sugar responses; and to enhance microbial richness through long fermentation, fibre-rich prebiotics and the inclusion of thirty diverse plant ingredients. These botanicals were selected because they deliver polyphenols, antioxidants and bioactive compounds shown in the Puratos LC-MS metabolomic analysis to promote microbial diversity and resilience (pages 3, 4, and 6–12)

My Bread Analysis

While anyone can enjoy this bread as part of a nourishing diet, it is especially well suited for people who:
• want a practical, food-based way to support mental well-being
• wish to increase fermented fibre in a structured, informed and safe way
• are working with a functional GP, nutritionist or mental-health professional and want to integrate food into their care plan

If you’ve been advised to increase fibre, improve microbial diversity or support digestive balance, this bread is designed with those considerations in mind.

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