High school health 5+3 pts according to the fda products labeled gluten free must contain less tha what of glutten

Less than 20 milligrams of gluten. 
Any food product bearing a gluten-free claim labeled on or after August 5, 2014, must meet the requirements of the agency’s gluten-free labeling rule. With this uniform definition, consumers with celiac disease can choose foods with greater confidence.

It true it will they want do take care headache, belly pain

Yes it does it plays a big role