How long do you have to eat gluten free to have it out of your system or reduce symptoms?

Don't self-test: The big problem with trying to make the diagnosis of gluten enteropathy / dermatitis herpetiformis without a physician's supervision is that you'll make the lab tests less reliable. Despite the fuss on the internet, gluten restriction for other health problems isn't evidence-based and can distract from getting to the real solutions.