I have added kefir to my diet. Kefir is a cultured, enzyme-rich food filled with friendly micro-organisms that help balance your "inner ecosystem." It really helps sluggish digestive systems.
It is an ancient food. Anything that has been eaten for literally thousands of years has got to have something going for it! It is more nutritious and therapeutic than yogurt, and it supplies complete protein, essential minerals, and B vitamins.
You can make it home if you like, but it is available in most grocery stores now. I buy an organic kefir at Whole Foods. It is thick and tasty and makes a great smoothie. And it helps balance out my insides. Of course, the unflavored variety is the best, but it does come in many sweetened flavors that make it more palatable. Kefir has a little more “zing” than yogurt.
I am lactose intolerant, but the beneficial yeast and friendly bacteria in the kefir culture consume most of the lactose (or milk sugar). I don't have much trouble with it.
Kefir, it's what's for breakfast. (But I also like to take a swig any time I open the fridge. Yum.)