1.How Does It Work?
The idea is to change your diet for a few weeks by cutting certain foods that might be causing you trouble. The issue might be something like pain, inflammation, headaches, or diarrhea. If the problem goes away, you add the foods back one at a time so you can see which one is the culprit.
2.How Long Does It Take?
Symptoms caused by food usually go away within 4 weeks of changing your diet. If they haven’t stopped after 8 weeks, those foods probably aren’t the cause.