The quickest way to boost your immune system, which is to say your digestive tract is to add probiotics, daily and nightly. So many today would say that you could be sensitive to gluten and have reactions to it. This could be true, but as I said EVERYONE has to have the proper bugs in their lower GI tract. Bad bugs are colonized down there if you have a poor American diet. Good bugs will get killed by the COLONIES of bad bugs that are there.
This used to be REVOLUTIONARY, when I started writing about these 5 years ago. Now there must be 10 products on the marketplace. KEY #1 Regular yogurt is filled with sugar and does not have enough good bugs. Your deep bad bugs are NOT IMPRESSED. KEY #2 Take good regular doses of the "good bugs". You need to do it for the rest of your life, but definitely for several months. Recolonization means that you will be starting a war in your gut. You probably won't feel it, but millions and millions of bad bugs need to be replaced by colonies of good bugs. This is much more erudite than just calling them good bugs and bad bugs. There is much on it, you can get through good searches. I drink kiefer, which Noah used, Moses got a hold of, and Mohammed hid from all the Christians for 1500 years, (Or his edict did). The reason it was special is because the people up in the Caucuses had tremendous longevity. They had big bags made of cowhides at their front doors. It would "cook" all the time, and people would come by and imbibe when they wanted it. Finally they got it out of the Caucuses and it spread through Eastern Europe. Now its at your grocery store. I drink it every night, about 2 cups. It goes down good, calms your tummy, helps you sleep and really improves your bowel movements. My wife can't believe I don't get sick (sniffles, coughs, colds) Its as easy as a nightly milkshake. Take it for at least 3 months for the colonization to take place.