Like the milk it's made from, yogurt is a very good source of calcium, phosphorus, and protein. Unlike milk, real yogurt also contains probiotics, the good bacteria your digestive system needs to process and benefit from all the other things you eat. One, Lactobacillus casei, boosts immune response.
The same key nutrients that give high-priced health foods their disease-fighting powers can be found in more common fruits and veggies. Here's where to look.