Essential oil refers to the general term for volatile aromatic substances extracted from spice plants or aromatic animals. Generally, essential oils are volatile aromatic substances extracted from plant flowers, leaves, roots, seeds, fruits, bark, resins, wood cores, etc., through methods such as steam distillation, cold pressing, fat absorption, or solvent extraction. Essential oils are divided into diluted (compound essential oils) and undiluted (simple essential oils), such as cactus seed oil. Essential oils are highly volatile, Once exposed to the air, it will evaporate quickly, so essential oils must be stored in a sealed dark bottle