doTERRA ON GUARD® Immune Boosting Snack - Soak some sliced apples in water and a few drops of doTERRA On Guard® for a healthy, immune-boostin - Cooking With Essential Oils, Essential Oil Uses, On Guard Oil, Apple Snacks, Doterra Recipes, Doterra Essential Oils, Doterra Onguard, Snack Recipes, Sliced Apples