What is sage common essential oil used for? Used in some pharmaceutical preparations such as mouthwashes, gargles, toothpastes, etc. Employed as a fragrance component in soaps, shampoos, detergents, anti-perspirants, colognes and perfumes, especially men’s fragrances. The oil and oleoresin are extensively used for flavouring foods (mainly meat products), soft drinks and alcoholic beverages, especially vermouth. It also serves as a source of natural anti-oxidants.