Low Fat and Limited Added Sugar
For a calcium boost, look for low-fat yogurts. When fat is removed, calcium gets concentrated. Lower-fat yogurt contains more—30% of your recommended daily intake. Some calcium is lost in the straining process for Greek, but it's still a great source at 20%.
Six ounces of plain yogurt have about 12g of naturally occurring sugars from the milk. Fruit and honey add more. Kid-centric yogurts come in cute 4-ounce containers, but some have more sugar (as much as 17g) than "adult" 6-ouncers.