A study published in Nature found that, "Mice fed a strain of Lactobacillus rhamnosus were less anxious and produced fewer stress hormones than control animals."
I'm sold! But consuming effective amounts of probiotic tablets and yogurt can get very expensive. Multiply that times the six anxious, antibiotic ravaged guts in our household, and it is completely cost prohibitive. Then I remembered, I could culture my own probiotics! I've posted before about kombucha and kefir, but I was having trouble getting my hands on kosher kefir grains or a kombucha SCOBY. I discussed my interest with a friend, who told me she makes her own sauerkraut - and it's easy!