The New Book- Learn to make Diversity Bread and reset your health with the Proven Bread Programme.
THE PROVEN BREAD PROGRAMME
The Proven Bread programme teaches you how to bake, eat and share Diversity Bread for optimal health. It has been running for over two decades, and the Proven Bread book — the programme in full — is due for publication in February 2027.
The book teaches you to make Diversity Bread, and to bake, eat and share it according to the Baking as Lifestyle Medicine (BALM) protocol. Over twelve months, a series of tasks guides you through real behaviour change, with a selection of self-assessments along the way so you can monitor your own health as it shifts. You’ll learn to rebuild your relationships with the people behind your bread — the farmer and the miller — and with your community, and to understand for yourself the impact bread has on your health through the tasks. One of the simplest and most powerful of them is also the most human: bake two loaves, and give one away.
The aim of Proven Bread Programme is to share how to use Baking as Lifestyle Medicine as Preventative healthcare.
Diversity Bread is a long, slow, naturally fermented, botanically diverse approach to bread made using The Baking as Lifestyle Medicine Protocol — the seven principles that guide how you bake, eat and share your bread;
This approach uses baking as lifestyle medicine and was developed over ten years as Proven is the name given to the intervention bread in my dietary studies. It is not a style of bread; it is a way of baking breads that are designed to deliver minimum levels of fibre, multiple polyphenols, culture fermentation-derived compounds and microbial complexity in a daily loaf that was designed to biohack health through bread. This approach to baking, eating and sharing bread is outlined in the Baking as lifestyle medicine approach and this was the foundation to my intervention bread for my dietary studies and used in both my doctoral research and a nutritional psychiatry project. The formulation, fermentation and botanical diversity were chosen because they support measurable shifts in microbial, metabolic and behavioural markers. Proven is the bread itself – and this can be applied to any formula as a clinically informed, evidence-based everyday bread that reconnects soil, farmer, miller, baker and eater, and turns the act of eating bread into system change
Proven Bread™ is the loaf at the centre of my work: a long-fermented sourdough made with Botanical Blend flour (30+ plants), around 18 hours’ fermentation and approximately 6 g of fibre per slice. It took a decade to develop and was used as the intervention bread in my BALM Protocol dietary studies and doctoral research, where it was associated with measurable shifts in mental-health and gut-health markers. Proven Bread is not just “better bread”; it is a designed tool for system change – reconnecting soil, farmer, miller, baker and eater, and reshaping how we bake, eat and share bread.
3. WHAT IS PROVEN BREAD™?
Proven Bread™ is a specific way of making bread that took twenty years to develop and 10 years to research and bring to market. Proven is the name of the bread I teach at The Sourdough School, and it is the bread used as the intervention loaf in my BALM Protocol dietary case studies, my doctoral research, and a nutritional psychiatry project. When I say “Proven”, I am not talking about a vague category of healthy bread. I am talking about this loaf.
It is a long-fermented, botanically diverse sourdough baked with Botanical Blend flour – over thirty different plant ingredients – and around 18 hours of live-culture fermentation. Each loaf is pre-sliced into 24 slices, delivering roughly 6 g of fibre per slice, made from regeneratively grown British grains and botanicals, stone-milled and hand-blended. There is no synthetic fortification; the functionality comes from the grain, the plants, and the fermentation.
During my doctorate, Proven Bread was analysed in the lab and compared to standard white and wholemeal loaves. The analysis showed nearly three times more polyphenols than wholemeal bread and around eight times more than white bread, along with two to three times the antioxidant activity and ten polyphenols not detected in standard breads, including caffeoylcholine. This is not marketing language; these are measured differences in the biochemical profile of the bread.
Proven Bread was then used as the single dietary intervention in my 12-week studies. Participants ate this bread in a structured way and tracked changes in their mood, digestion, sleep, satiety and other symptoms, alongside microbiome testing in some cases. The studies reported measurable improvements in mental-health markers and gut-health indicators. Most research loaves never leave the lab or the paper they’re written on; Proven Bread does both. It is the same loaf you can learn to bake or receive through the Proven programme.
But Proven Bread is more than a research project. It is a piece of system change you can hold in your hands.
The formula was designed to reconnect the parts of the food system that have been fragmented: soil, farmer, miller, baker and the person who eats or bakes the bread. It is a transdisciplinary project – bringing together clinical evidence, microbiology, nutrigenetics, fermentation, regenerative agriculture and craft baking – and flattening them into one accessible, shared object. It biohacks bread in the truest sense: using fermentation, botanical diversity and structure to support the gut–brain axis and metabolic regulation, while remaining an everyday, eatable loaf.
Proven Bread reshapes how you bake, eat and share bread. It invites bakers, clinicians and home cooks into the same system: farmers growing grain for health, millers creating Botanical Blend, bakers fermenting and baking with intention, and people eating bread that has been formulated with their physiology, not just machinery, in mind. It is an empowerment tool as much as it is a food – a way for ordinary people to participate in system change, slice by slice.
This is not a patch on a broken system.
Proven Bread is a prototype of a different one.
What happens when everyday bread is designed with human biology in mind?
This is Proven Bread™.
