Gluten, no gluten Flashcards
What is gluten? Which cereal grain has the highest gluten levels?
The protein component of wheat, barley, and rye. Wheat has the most protein of the cereal grains.
What percentage of the world’s food calorie consumption comes from wheat?
~20%
What 2 storage proteins are present in wheat? How can they be bonded to make gluten?
- Glutenin
- Gliadin
Kneading produces bonding.
How does the presence of gluten during baking cause bread to rise?
The gluten structure traps CO2 released by yeast fermentation.
How long have humans been consuming wheat?
Since domestication ~10000 years ago.
What is celiac disease? How common was it in 1950? What about today?
An immune reaction leading to damage of the intestinal villi and reduced nutrient absorption. Increased in prevalence from 0.2% in 1950 to 1% of population today.
What were the conclusions drawn from the gluten experiment done by Peter Gibson in 2011?
Evidence to support non-celiac gluten sensitivity.
How many Canadians were reported to look for gluten-free products in 2017?
10 million.
How much did the global sales of gluten-free food increase in 2016? To what value per year?
Increased by 12.6% to 3.5 billion per year.
If not gluten, what is actually causing non-celiac gluten sensitivity?
Fermentable oligo-di-monosaccharides and polyols (FODMAPs).
What are some common examples of FODMAPs?
Fructose, lactose, fructans, galactans, polyols, etc.
Alongside sweeteners, what fruits are noted to contain polyols?
Stone fruits (avocado, apricot, cherry, etc).
What is the purpose of FODMAPs in the plant?
Used to hold water (makes fruits juicy).
How do FODMAPs cause non-celiac gluten sensitivity?
By pulling water into the intestinal tract. When FODMAPs are poorly digested, they can be fermented by bacteria causing gas/discomfort.
Why is extra gluten sometimes added to baked goods?
To strengthen dough and help it to rise. Also increases elasticity and shelf-life.