Buttermilk, yoghurt.... we're talking about fermenting milk. Sounds dubious but it is very healthy. If you want to take probiotics for your gut, then buying Yakult can be expensive. So, instead, why not make your own KEFIR? From 'Homemade Mommy' Elly has looked into it and has mastered it. It is a bit tricky at first but once you have worked it out, it is quite achievable and cheap as chips. You can eat the 'grains', make a milky drink or add it to cooking. (Introduce it slowly though to avoid some side effects! ) If you are a part of The Craft Group, Elly is happy to provide you with some Kefir grains to get you started. I found this blog post from "Homemade Mommy" really informative. Read before you try. She has a link you can click on for an informative post on fermented foods in general and how they are good for you. I am no expert on this topic, just sharing that Elly has some 'starter' grains if you are interested. But I am i...