Can I use UHT (ultra-high temperature aka ultra-pasteurized) milk to make kefir?
A. We do not recommend using UHT milk with any of our starter cultures (including yogurt, buttermilk, kefir and cheese starters). The process by which UHT milk is pasteurized leaves the milk essentially dead for purposes of culturing and therefore you are likely to have less than satisfactory results when using it to make cultured foods.
