Why do you say you can't drink dairy everyday? If you're having problems drinking water kefir, then the easiest way to get the benefits of kefir is by drinking milk kefir instead.
Kefir made by kefir grains is part yeast and lots of bacteria. And I've found that some people's body have a tendency to reject it initially. But by drinking only the tolerable amounts at first, then slowly increasing the amount, your body will learn to adjust.