thanks to several of the knowledgeable and patiently informative people on this fine forum (thank you!) i've gotten interested in making my own water kefir. i'm hoping to obtain the grains from one of the vendors i've located in my own country (in Central Europe), but after prowling around the internet a while, i'm still unsure about one big basic question:
how can you tell whether or not the grains you get are The Right Stuff? i don't mean to be paranoid, but after all we are talking about ingesting homegrown bacteria that are being shared on an unsupervised cottage-industry-type basis, so it seems like there should be some way of making sure that what we've got ahold of actually contains good probiotic strains of bacteria, not something loopy that someone's cultivated in their kitchen
thanks for any insights!