Science

This is anecdotal, I know, but I honestly digest peanut butter better (without stomach cramps) after I eat live sauerkraut or kimchi.

I highly recommend the lady on cleanfoodliving.net (or her youtube channel) for starting a journey of fermenting. She has an awesome recipe for sauerkraut and one for red cabbage beet kraut that is my absolute favorite. I also recommend trying fermented carrots. I actually have a carrot allergy, but can tolerate cooked carrots and have found fermented carrots to be ok as well. I believe cooking and fermenting both alter the proteins enough to make the allergenic proteins in carrots tolerable. *I cannot guarantee everyone will have this result, so please use caution if you have a more severe reaction to any allergenic foods.