Gluten is a collection of proteins found in:
Wheat
Wheat Cousins (Spelt & Kumut)
Rye
Triticale (a wheat-rye hybrid)
Barley
Oats
An endless variety of processed foods
Of all these grains, wheat is the most challenging, largely because it contains the most gluten.
Food manufacturers, especially bakers, love gluten and have a high regard for the types of wheat that contain the most gluten, [...]



