My DD can not drink Root Beer. She had a reaction once and it was related to Wintergreen as a natural flavor - and the wintergreen flavoring was made with Hazel nuts! That one took a bit to figure out. So I Googled what other "natural" flavors are used in root beer and found this. Any issues with these natural ingredients.
Ingredients
There are hundreds of root beer brands in the United States, produced in every US state. It is a flavor almost exclusive to North America, yet there are a few brands from other nations around the world, such as the UK, the Philippines and Thailand where the flavor often varies considerably from the typical North American drink.[1] There is no standardized recipe. The primary ingredient, artificial sassafras flavoring, is complemented with other flavors. Common flavorings are vanilla, wintergreen, cherry tree bark, licorice root, sarsaparilla root, nutmeg, acacia, anise, molasses, cinnamon, clove and honey.