Health.com has some great tips on how to save money buying 'healthy' food. First, yogurt is a great source of calcium and protein, but it's best to buy plain Greek yogurt and sweeten it with your own fresh fruit and honey. As for bottled salad dressings? They're full of highly processed oils, added sugar, and artificial colors. Make your own--fresh and homemade. You're not getting your nutritional bang for your buck with juice, either.