Essential oils extracted from the aromatic parts of the plantsare highly concentrated oil. If used for the application topically, it is essential to dilute the essential oil with carrier oil, as direct application can cause skin reactions. There are many oils which are available for dilution in essential oils. The carrier oils are also derived from the parts of the plant, such as seeds, nuts or kernels. The carrier oils do not evaporate and have zero to mildly sweet smell. The essential and carrier oils can be combined for making massage and body oils. The dilution rate is different for infants, young children, healthy adults and people with temporary health concerns.