Extensibility
A property of dough which allows it to be stretched. See also ‘Elasticity’.
Learn to Bake the Healthiest Bread in the World
Bestselling author, Dr. Vanessa Kimbell, author is a time-served sourdough baker who trained in the art of sourdough bread the Dordogne. She holds a doctorate in Baking as Lifestyle Medicine and Preventative Health, and is a member of BANT, Vanessa combines a deep expertise in the the art of sourdough with unparalleled knowledge in the science of bread and digestion. At The Sourdough School, she teaches personalised artisan bread, tailored to optimise gut health and genetics. Explore healthy bread recipes, tips, and techniques, featuring sourdough fermentation, wholegrain insights, and personalised baking advice to inspire a slower, healthier way to bake, eat, and share bread.
Whether you’re reading one of my books, or a feature, following a recipe, or you have stumbled across this page on a google search, you may encounter some unfamiliar terms, especially if you’re new to baking. I often write about health and lifestyle medicine alongside my recipes and articles. I believe that knowledge is empowerment, and I never want to oversimplify or water down the information I share.
Too often, we assume people don't want deeper insights, but I believe that understanding the ‘why’ and ‘how’ behind baking leads to better, more intentional choices. The purpose of this glossary is to ensure that everyone—regardless of their background or level of baking experience—has equal access to the knowledge they need to bake bread that is not only delicious but deeply nourishing.
It’s not just about making bread; it’s about making sure that the people you bake for are nourished, ensuring that the bread you bake possibly impacts you, and is full of nutrients and made with purpose and care. So this glossary has been created so I can share that knowledge as generously and widely as possible in the hope that you will, in turn do the same.
Please get in touch if you have any suggestions for additions.
Kind regards
Dr Vanessa Kimbell
A property of dough which allows it to be stretched. See also ‘Elasticity’.
A measure of the percentage of the grain that is made into flour during the milling process. Flour with a higher extraction rate has more of the bran, germ and …
Sourdough starters are a symbiotic relationship between lactic acid bacteria and yeast. So you will find different find both yeast and lactic acid bacteria. There are three categories of of …
Damp grains may germinate prior to milling, resulting in poor quality flour. The Falling number test indicates the amount of sprout damage by measuring enzyme activity in a wheat sample.
Equipment for measuring the rheological properties of dough as it is mixed. A farinograph measures development time and the stability of a dough during mixing.
Fermentation occurs when the yeast and bacteria in dough convert carbohydrates (simple sugars) to carbon dioxide and alcohol. A process that causes gas bubbles to form and has a leavening …
A phenolic phytochemical found in the cell wall of plants. One of the most abundant phenolic acids in plants and an antioxidant. Ferulic acid (4-hydroxy-3-methoxycinnamic acid) is a naturally occurring …
Dietary fibre is a term that is used for plant-based carbohydrates that, unlike other carbohydrates (such as sugars and starch), are not digested in the small intestine. It also includes …
Flaxseed (or linseed) are small seeds that are high in fibre and can be used to bring a range of health benefits to your baking. There is evidence that flax …
Fermentable oligo-, di-, mono-saccharides and polyols: a group of short-chain carbohydrates (lactose, fructose, fructans, sugar alcohols, and galactans) that are indigestible to some people and may be associated with symptoms …
Folate is a B vitamin which is used by the body in the formation of red and white blood cells, metabolising carbohydrates to produce energy and in DNA and RNA …
A technique for aiding gluten development in a dough. The dough is tipped out onto a work surface and folded in thirds, like a letter, turned through 90o and folded …
What is food security? When we refer to food security waht we are measuring is the ability of people gloablly to access to safe and nutritional food and accecss is …
An atom or molecule with at least one unpaired electron. Free radicals are highly reactive, seeking to acquire electrons. They are known to cause cell and DNA damage in the …
The part of a grain that, given the right conditions for germination, would sprout. The germ has a high fat content, and is usually separated out during milling because its …
A protein in wheat and other cereals needed for the formation of gluten. Gliadin provides extensibility in dough, allowing it to stretch. See also Glutenin.
Gluten is a complex protein composite found predominantly in the endosperm of wheat, barley, and rye grains. It plays a crucial role in various baking and culinary applications, contributing to …
A protein found in wheat and other cereals, needed for the formation of gluten. Glutenin gives dough its elasticity, causing it to spring back into shape when stretched. See also …
The glycaemic index (GI) is a rating system that shows how quickly each food affects your blood sugar (glucose) level when that food is eaten on its own. The GI index …
Definition: Glyphosate is a broad-spectrum systemic herbicide and crop desiccant. It is used to kill weeds, especially annual broadleaf weeds and grasses that compete with crops. It was discovered to …
Freshly Milled Flour, Oxidation, and Green Flour Freshly milled flour that has not had time to oxidise retains many of its natural nutrients and flavours. This is because the milling …
The gut-brain axis is a bidirectional communication pathway between the gut and the brain. This communication occurs via a complex network of neural, endocrine, and immune signalling pathways. The gut-brain …
What is the Gut microbiome? The gut microbiome comprises of the trillions of bacterial species that inhabit our gut, mainly the large intestine. In the last decade, the gut microbiota …
The Gut-Brain Axis is a signalling pathway which exists between the gastrointestinal tract and the central nervous system. The communication between these two systems is largely affected by the composition …
Varieties of wheat with a high protein and gluten content, making them especially suitable for bread making. Usually grown in areas with colder climates.
You do not have to understand bacteria in your starter to make great bread. However a rudimentary understanding of the balance of the bacteria can help you develop the flavour …
Flour with an extraction rate between whole wheat (100%) and bread flour (70-75%).
Homofermentative LAB (homo meaning ‘all the same’) refers to the end product of fermentation, which is only, or ‘all’ lactic acid, they also produce carbon dioxide (CO2) as by-product . Lactic acid is the flavour …
Understanding Flour and Adjusting Hydration in Sourdough is key to success. Whenever I have students here they all tell me that they just want to follow the recipe right? So …
Describes a substance which absorbs water from the surrounding environment.
Inflammation is your body’s way of responding to and defending itself against injuries, infections and even, in some cases, food that your immune system recognises as a threat. When your …
Iron is used in making red blood cells which carry oxygen around the body. About two-thirds of the iron in our body is found in haemoglobin. You should be able …
Irritable bowel syndrome (IBS) is a common life-long gastrointestinal disorder in which sufferers experience digestive discomfort in the form of stomach cramps, constipation, diarrhoea and bloating. These symptoms can occur …
Khorasan (Triticum turgidum subsp. turanicum) is an ancient form of wheat, named after the historical region of what is now Iran. Grains of Khorasan are larger than modern wheats and it is …
Kjeldahl Method: The Kjeldahl method, developed by Johan Kjeldahl in 1883, is a widely used analytical technique for the determination of the total nitrogen content in organic and inorganic samples. …
The process of working dough by pressing, folding and stretching to ensure even distribution of ingredients and to develop gluten.
The process of knocking excess air out of the dough after the bulk prove. This makes for a more even texture in the bread.
An organic acid produced by lactic acid bacteria during the fermentation process.
A tool consisting of a handle with a straight or curved blade, used to score the top of a loaf just before it is baked.
Before I even write the word levain – I refer to Leaven as both a leaven and Levain. In the same way as the Bible calls Satan by many different …
Low-density lipoprotein (LDL), commonly though incorrectly referred to as “bad” cholesterol because they deliver fat molecules to cells specially within blood vessels such as arteries. The deposition of fat within arteries could …
We all know that tomatoes play a big role in improving the flavour and colour of our food and, if we’re being honest, we probably consume them on a daily …
Magnesium is a mineral that is used by the body to help maintain normal muscle and nerve function. It is also important for keeping our heart rhythm steady and regulating …
The Maillard reaction is a chemical reaction between an amino acid and a reducing sugar – it occurs when certain foods are heated or stored, and changes their flavour and colour. It’s …
Malt is a key ingredient in baking. It is grains that have been soaked in water, allowed to germinate, and then dried out. This process helps develop special enzymes in …
Produced by allowing barley grains to germinate, then dried quickly before a plant develops.
Manganese is only needed in small amounts, but has a role in many bodily functions. These include the formation of healthy bones, blood clotting, reducing inflammation and producing antioxidants. It …
A hormone which helps regulate your sleep cycle. Its production is influenced by your body’s internal clock and by exposure to light. Generally, melatonin levels will rise through the evening, …
Metaflammation, also known as metabolic inflammation, is a term that describes the chronic low-grade inflammation associated with metabolic diseases such as obesity, type 2 diabetes, and cardiovascular disease. The term …
Mixing Sourdough: A Personal Touch When it comes to baking, mixing is one of my favourite parts. There’s something truly really magical about getting your hands into the flour and …
Definition: The MTHFR gene (Methylenetetrahydrofolate Reductase) is a gene that provides instructions for making an enzyme of the same name, which plays a crucial role in processing amino acids, the …
Naked oats (Avena nuda) are oats which naturally lose their husk during the harvesting process. They are recommended for home milling because it is the husk that makes oats difficult …
A method of making bread which eliminates the bulk fermentation by using high-energy mixing to speed up gluten development. It is used by many large bakeries because it allows loaves …
A harmless substance that when taken by a patient is associated with harmful effects due to negative expectations or the psychological condition of the patient.
This is a term that really divides people. In many ways, the symptoms overlap with IBS, but more about that in a moment. Non-Celiac Gluten Sensitivity (NCGS), sometimes also referred …
The International Federation of Red Cross and Red Crescent Societies (IFRC) defines Non-communicable diseases are “diseases that are not spread through infection or through other people, but are typically caused by unhealthy …