**4. Modern trends of essential oils**

The essential oil has been large number of usages in worldwide products including the ice creams perfumes, backed food stuff, beverage, and cosmetics as shown in **Figure 3**. Newly, at least 300 kinds of essential oils out of 3000 are commercially important in various kinds of industries including the perfume and sanitary industries, cosmetics, food, beverage, agronomics, and pharmaceuticals [20]. Some of the bioactive components that are present in essential oils are the limonene, geranyl acetate, carvone, etc., and these are the important components of the hygienic products and tooth pastes. Essential oils are used for the preservation of the food additives; for the treatment of common diseases and folk medicines; and used by aromatherapist. Essential oils are used as the natural antioxidant. The usage of natural antioxidant is prominent in the defensive medicines and food items, and because of this reason, essential oils are getting popular day by day. Recently, the growth explores the applications of the volatile essential oils for remedial usage and in the treatment of some infectious diseases [21].

Essential oils are widely used in perfumes, personal hygiene products, and in aromatherapy including the inhalation, massage, masking agent to avoid the unpleasant odor in the textile industries, paint and plastic industries, and pharmaceuticals formulations. Essential oils are also used as the natural antifungal and antibacterial agents in the food safety items; essential oil also used in the various kinds of cereals, antimicrobial packing of the food items, edible thin film, nanoemulsion, preservation of the fruits and vegetables, soft drinks, as the flavoring agents in the carbonated drinks, as the major ingredients in soda/citrus concentrates, seafood preservations, fish, etc. (**Figure 3**) [22].

**Figure 3.** *Modern trends of essential oils.*
