The fresh scent gives a sense of happiness, calmness, and serenity.

References to essential oils date back to 2000 B.C., and the use of plants and oils for therapeutic and religious purposes is also mentioned in the Bible. They were widely used by the Egyptians, who developed techniques for producing perfumes and oily ointments as cosmetics and therapeutic agents. These techniques, knowledge, and compositions were utilized by other cultures that followed the Egyptian and gradually came to Europe through the Greeks and Romans.

Essential oils are produced by plants for various reasons such as:

• The transpiration of water from their leaves during the warm months
• The attraction of insects
• The protection against herbivorous animals and diseases

Their chemical composition can vary depending on the plant from which they originate, the part of the plant, the climate of the country, etc.