A chain restaurant that deserves a mention is Jamba Juice, which is to be especially commended for having a binder at every location that lists the ingredients for each of the smoothies and food items it offers. This is an easy way to find out that the apple cinnamon pretzel is vegan, for example, but the pumpkin ginger muffin is not. They also have nutritional information on their website for each of their menu options, and it allows you to sort them so that you can see only the items that are vegan (http://www.jambajuice.com/products/dietpref/vegan).
Jamba Juice offers several vegan smoothies, including some that are made from all fruit. The one that keeps me going back for more is the Pomegranate Paradise, which is made with strawberries, mangos, peaches, and a pomegranate juice blend. In most cases, even the smoothies that contain yogurt or sherbet can be made vegan by substituting sorbet for the dairy items. All of their boosts are vegan as well, except for the Weight Burner, Whey Protein, Calcium, and Daily Vitamin.
Jamba Juice has numerous locations in the Sacramento area. Their website address is http://www.jambajuice.com.