Water kefir grains are a symbiotic relationship between yeast and bacteria. They are plump, translucent grain-textured bacterial cultures that convert sugar into healthy probiotics, enzymes and electrolytes. They emit CO2 which adds pleasant carbonation to the drink they make, called water kefir. Water kefir can help boost the immune system, enhance gut health and calm bloating. Package contains 1/4 cup LIVE water kefir grains. Grains are shipped in dormancy. Refrigerate grains upon receiving your delivery, as the cultures are live and appreciate a cool environment.