Conférence sur la malbouffe
Transcription
Conférence sur la malbouffe
Celiac Disease vs Gluten Sensitivity Lecture presented March 21, 2015 by Romain Gagnon, Engineer and Baker What is gluten for? Where does it come from? What is it? Gluten allows bread making What is bread actually? Flour + Yeast + Water Bread making The yeast digests the flour starch and produces carbon dioxide (CO2) and alcohol (CH2OH) CO2 bubbles remain trapped in the gluten network of the flour and the dough expands Thus the bread "rises" Then the bread is cooked and keeps its volume The importance of gluten No gluten = no bread A gluten-free bread is actually a cake Only wheat and rye can make bread What is bread flour? It is ground wheat (rye) grain What is Wheat? Grain belonging to the genus Triticum of the Grass family Third most important cereal world-wide after Corn and Rice (600 Mt) First cultures dating back more than 10,000 years ago (Neolithic era) The ancestor of wheat is a wild grass that grows in the Middle East: the Goatgrass. The modern wheat is the result of multiple genetic selections over several thousand years (14 to 42 chromosomes) The ancestral wheats such as Spelt, Khorasan (Kamut) and more recently Red Fife have undergone little or no changes The modern Wheat In the last century, wheat has undergone several genetic selections to increase productivity and resistance to pesticides This genetic selection was made at the expense of nutritional values (more calories, less micronutrients and fiber) To expedite the process of breeding wheat, mutations were induced artificially by exposing DNA to highly carcinogenic chemicals Some wonder if these mutations are responsible for contemporary gluten sensitivity in some people The ancestral grains Some grains are called ancestral because they have undergone less genetic transformations with millennia Spelt (Triticum spelta) is richer in protein (lysin), but also magnesium, zinc, iron and copper Kamut (Triticum turgidum) or Khorasan wheat is less caloric, and also very rich in proteins and minerals (selenium, zinc, magnesium) Rye (Secale cereale) tastes stronger than wheat. It is very rich in fiber and contains many antioxidants Red Fife is a Canadian ancestral wheat that grew here until 1900. The gluten intolerant individuals generally respond better to the ancestral grains Gluten comes from the wheat grain (and rye) The grain has 3 distinct parts: interior (Endosperm), envelope (Bran), and Germ The bran is rich in fiber The germ is rich in vitamins and minerals The endosperm consists mainly in carbohydrates (starch) but also 15% protein (gluten) Flour making The grain is milled to give flour Once, the grain was ground on millstone driven by a windmill or even animals The flour is then roughly sifted to remove part of the bran and germ White flour contains only milled endosperm (gluten & starch) A so-called whole-grain flour contains at least 90% of the original weight after sifting; it retains the germ and most of the bran Stone-ground flour The flour is milled at low speed which prevents overheating (44°C) The vitamins are protected and the germ can be saved The whole-grain flour is slightly sifted to remove only the coarse bran It contains at least 90% of the original weight after sifting The fiber is saved The white flour is sifted to remove more bran Industrial flour The flour is milled on steel cylinders at high speed and overheats (200°C) The vitamins are destroyed and the germ must be removed The flour is then sifted to remove bran and germ Therefore the fiber is gone Then the flour is bleached with chemical products (chlorine, chlorine dioxide, benzoyl peroxide, double aluminium sulfate , ammonium persulfate , ammonium chloride, acetone peroxide , azodicarbonamide) At the end, the flour is so poor that it needs to be enriched (thiamine, riboflavin, niacin, niacinamide, folic acid, iron) To make whole-grain flour, some bran is added back Yeast Most breads, either industrial or craft made, use yeast It is a single strain of Saccharomyces cerevisiae, a yeast genetically selected for its performance This yeast is very aggressive. It produces large quantities of carbon dioxide from the digestion of wheat starch It therefore produces more airy and soft breads This modern process has nothing to do with the original process to make bread Sourdough The first breads were made from sourdough not yeast Sourdough occurs naturally when fermenting a mixture of water and flour This fermentation is the result of a symbiosis between lactic bacteria and alcoholic yeast Sourdough makes a denser and harder bread He also leaves a slightly sour taste to bread Sourdough degrades bad gluten (prolamins) Sourdough lowers glycemic index of starch Sourdough degrades the phytic acid, a natural yet toxic fungicide in the bran Gluten The word "gluten" comes from Latin and literally means "glue" It is a mixture of proteins, mainly prolamins and glutenin It is its viscoelastic properties that allow bread making Wheat and rye naturally contain gluten but not buckwheat, corn, rice nor millet Only grains that contain enough gluten can be used to make bread Said buckwheat (or rice, or millet) breads actually contain at least 75% wheat. Gluten Toxicity For the majority (82%) of the population, gluten is no problem, no matter the amount ingested. In some cases (<1%), gluten causes severe inflammation that destroys part of the intestinal wall and causes many health problems (anemia, fatigue, abdominal pain ...). This is the celiac disease. Since it is an immune problem, it is easy to diagnose from antibodies in the blood. Among some individuals (<6%), gluten causes a non-immune inflammatory response which causes digestive discomfort; it is the gluten sensitivity (Gibson 2011) Gluten Toxicity Other individuals (5%) have real intestinal symptoms when they ingest wheat products but gluten is not concerned. Instead it would be a sensitivity to FODMAPs (Fermentable Oligo-Di-Monosaccharides and Polyols), some small chains of carbohydrates. Yet 18% of the population consumes gluten-free products. The difference (6%) is probably psychosomatic (Gibson 2013). This is the concept of the "nocebo" Gluten Toxicity Celiac Disease <1% Gluten sensitivity <6% FODMAPs sensitivity 5% No reaction 82% Psychosommatic 6% Research&Development project Gluten concentration (ELISA test) The scam of Whole-Grain bread A real Whole-Grain bread is a sourdough bread made from stoneground whole-grain flour In France, the term “Intégral" (“Whole-Grain” in English) has a legal definition and counterfeiting is severely punished. In Canada, the terms “Whole-Grain" and “Intégral” have no legal definitions Most so-called Whole-Grain breads on the market in Canada have nothing to do with the French definition They contain white flour and/or added gluten Very few bakeries produce sliced sourdough bread The explanation is that commercial bakeries want bread both soft and nutritious, two incompatible qualities The consequence is an astronomically high gluten content (from 10% to 30%) How to denature a whole-grain bread Genuine Whole-Grain bread Germ + bran + gluten + starch + nothing – nothing = Germ + bran + gluten + starch Industrial Whole-Grain bread Germ + bran + gluten + starch – germ – bran = Gluten + starch Counterfeit Whole-Grain bread Germ + bran + gluten + starch + gluten + starch = Some germ + some bran + gluten + starch Ingredients of the most popular « WholeGrain » bread on the market Organic whole-wheat flour, organic wheat gluten, organic sugar, organic soy oil, sea salt, cultured wheat starch, yeast, organic soy flour, organic apple cider vinegar, enzymes, organic hulled barley flour, ascorbic acid Gluten content Modern wheat: Spelt: Khorasan (Kamut) : 1.0 : 1.0 1.3 : 1.0 1.0 : 3.5 In addition, sourdough degrades prolamins by a factor of 4 Gluten content (ELISA test) Inéwa has solutions to every problem Celiac disease Gluten-free FODMAPs sensitivity Spelt Wheat allergy Rye Gluten sensitivity Khorasan Modern wheat sensitivity Red Fife References Tavakkoli A, Lewis SK, Tennyson CA, Lebwohl B, Green PH. Characteristics of patients who avoid wheat and/or gluten in the absence of celiac disease. Dig Dis Sci. 2013. doi:10.1007/s10620-013-2981-6 [Epub ahead of print] [PubMed] Carrocio A. Mansueto P. & al. Non6coeliac wheat sensivity diagnosed by double blind placebo-controlled challenge : exploring a new clinical entity. Am J Gastroenterol 2012;107:1898-1906. Biesiekierski JR, Peters SL, Newnham ED, Rosella O, Muir JG, Gibson PR. No effects of gluten in patients with self-reported non-celiac gluten sensitivity after dietary reduction of fermentable, poorly absorbed, short-chain carbohydrates. Gastroenterology. 2013;145:320–328. DiGiacomo DV, Tennyson CA, Green PH, Demmer RT. Prevalence of gluten-free diet adherence among individuals without celiac disease in the USA: results from the Continuous National Health and Nutrition Examination Survey 2009–2010. Scand J Gastroenterol. 2013;48:921–925. [PubMed] Sapone A, Bai JC, Ciacci C, Dolinsek J, Green PH, Hadjivassiliou M, Kaukinen K, Rostami K, Sanders DS, Schumann M, Ullrich R, Villalta D, Volta U, Catassi C, Fasano A. Spectrum of gluten-related disorders: consensus on new nomenclature and classification. BMC Med. 2012;10:13. doi: 10.1186/1741-7015-10-13. [PMC free article] [PubMed]