Yogurt is very healthy. You can even mix it with stuff and freeze it in ice cube trays to make tasty post workout treats.
I usually buy the Hannaford store brand (its cheap!) or Stonyfield Farm Organic Lowfat Plain. Its simple, just yogurt, no sugar or artifical tastes added. I sometimes like to put in strawberries or walnuts.
1 cup contains
Calories 120 - From Fat 20
Total fat 2g (1.5g saturated, 0g trans)
Cholesterol 10gm
Sodium 150mg
Carbs 18g (Dietary fiber 3g, sugar 15g)
Protein 10g
40% of recommended daily calcium.
Its also good for thickening up shakes if yours need it and stuff. And even the plain tastes yummy.