i stopped eating dairy/cheese or wheat bread probably 3 years ago, mainly because i have no will power and will eat too much of either if i buy it.
since sinemet is my primary drug it is affected by my protein intake, dairy and legumes seem to reduce sinemet's affect more than wheat. a low protein diet with sinemet improves the affect of sinemet in some people.

if this article involved just 1 person what does it really mean?

anyone can test going gluten free on their own, can't they?
that means no wheat pasta, wheat products -no wheat/rye bread, cookies cakes, , no licorice and checking every food label.