In addition to juice flavor variants, since 2006 additional Naked Juice versions have been produced with a focus on specific health aspects such as digestion, protein and reduced-caloric content. In 2007, Naked Juice "Probiotic "was introduced, having been represented as the first 100-percent juice smoothie to contain probiotics for the aid in digestion. A protein-focused line of Naked Juice smoothies (marketed as "protein zone") was first introduced in the early 2000s, with the addition of "mango" and "double berry" flavors in 2009. Two reduced-calorie Naked Juice smoothies were introduced in 2010: "tropical "and "peach guava". Both of these products contain coconut juice, which is naturally lower in caloric content in comparison to other fruits.