An interesting article from BASF (major German based company) concerning menthol. There are two types of menthol. Read more about menthol production below. https://www.basf.com/group/corporate/us/en/news-and-media-relations/science-around-us/menthol/story
"A mixture of the two variants, known as DL-menthol, is required mainly for products in which the cooling effect is not predominant, for example in certain flavoring ingredients." The combination of D and L menthol provides a slightly minty flavor that the grill sauce makers can use to balance other flavors and spices in the sauce.
