Connie M Switzer’s research while affiliated with University of Alberta and other places

... An estimated 1% of the Canadian population lives with CD while up to 6% of the population may be affected by NCGS [7,8]. A complete and life-long gluten elimination from the diet is to date still the only known effective strategy to 'treat' CD and NCGS, tremendously narrowing consumer choices, increasing food costs, and affecting overall consumer well-being by e.g., negatively affecting family activities such as travel and dining out [9]. Recently, about 2% of the Canadian population indicated they follow a gluten-free diet [8]. ...

Reference:

Gluten-Free Product Recalls and Their Impact on Consumer Trust