It varies depending on the book. The recipes in 101 Juice Recipes and 101 Smoothie Recipes books are 8 oz per serving. Each recipe makes 2 servings.
The recipes in The Reboot with Joe Juice Diet, Reboot with Joe Juice Diet Cookbook, and Reboot with Joe Plant-Based Recipes are 16 oz per serving. Each recipe makes 1 serving.
All recipes make a total of 16 oz of juice, which is what we recommend when going on a Reboot.