Popular dietary restrictions that have little evidence may have real harms.
Celiac disease is all-too real, but is there sufficient evidence to support non celiac gluten sensitivity (NCGS)? For an insightful analysis of NCGS read this careful evaluation. When limiting gluten people tend to reduce the amount of whole grains they eat, thus missing out on important nutrients. There is also evidence that low-gluten diets may lead to higher risks of type 2 diabetes.
PositiveTip: Beware of health gurus selling simplistic, appealing remedies with no evidence to support their nonsense.