The Alchemy of Sourdough Bread

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First appeared in Grainews on 4 June 2019
Gluten and wheat intolerance has been on my family’s radar for decades. My sister Lee gave up eating all wheat-based foods in her early twenties after a childhood and teenager-hood filled with bellyaches and gastrointestinal distress. Fifteen years ago, my own body started to experience similar negative reactions to bread. But according to food writer and historian Michael Pollan, bread is both the product and the enabler of civilization, the bedrock food of many countries. Bread shortages have led to riots and wars. So bread – good bread – was not something I was willing to let go of lightly.

Bread-making has changed from its peasant origins. Between the original flour, water and salt that made the first loaves and modern industrially-produced bread lie what Pollan says are as many as 37 additives. Agreed, white bread is cheaper to produce and less perishable, made with mass-produced roller-milled flour instead of stone-ground whole-grain flour. But it’s also less nutritious. So the big bakeries fortified breads by adding vitamins, minerals, dough conditioners, stabilizers, amino acids, preservatives. Do those additives upset my gut?

In my own kitchen, I switched to making and eating only sourdough bread made with local organic flours after my own evidence convinced me that somehow, sourdough bread was easier on my belly than store-bought. But I had no proof of why. So I looked around for clarification.

In “Air,” Episode 3 of his Netflix series, Cooked, Pollan turns his analytical mind to the most ephemeral of the elements in his exploration of bread-making. Air adds gases and other flavours as well as lightening bread’s texture. Gluten is the balloon that contains the bubbles of gas and air in bread.

Why can I eat sourdough? I read studies showing that sourdough bread’s slow fermentation process reduces the amount of FODMAPs (fermentable oligosaccharides, disaccharides, monosaccharides and polyols), types of carbohydrates that are present in bread but are not well absorbed in the small intestine and cause bloating and flatulence. But Pollan suggests that just as important is the long slow fermentation inherent to sourdough bread-making. Fermentation is key to health: wheat is hard to digest. That long fermentation allows bacteria to fully break down wheat’s carbs and gluten strands and releases its minerals for easier absorption.

Using commercial yeast gives bread a faster lift but overlooks the rest of fermentation’s role. With no breakdown of carbs and gluten, that bread is harder to digest.

I feel vindicated. And I keep baking. Sourdough bread is the most satisfying food in my kitchen.

Ask your artisan baker for a cupful of starter (or make it yourself.) Then get out the bread knife and the butter. First we eat, then we talk about crust and crumb.

sourdough

“Sourdough bread is the most satisfying food in my kitchen.”

DEE HOBSBAWN-SMITH

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