Yogurt can be a staple in a healthy diet, providing you with a good source of calcium, protein, vitamin D and potassium. Picking any yogurt brand or eating yogurt in excess, however, can contribute to problems such as weight gain, high cholesterol and heart disease. The many yogurt brands in your supermarket fall across the nutrition spectrum, from heart-healthy to fatty, sugar-filled products little better for you than candy. Read yogurt labels carefully to choose the healthiest type.