What do you use for natural flavoring? Administrator August 16, 2017 19:11 Natural Vanilla Flavor, Natural Mandarin Orange Flavor, and Luo Han Guo. Related articles How can I be sure your "natural flavoring" is safe? Beauty Boost (Orange) Are any sweeteners besides Stevia approved for the Slenderiiz Program? Would coconut water versus coconut milk be an approved liquid for the PureNourish shakes? Power Boost (Cocoa) Comments 0 comments Please sign in to leave a comment.