Individual essential oils (“singles”) can be blended to create combined and even enhanced therapeutic effects - hence,
a blend.

For example, tea tree oil has powerful antibacterial properties, while ravensara oil has strong antiviral properties. These two oils can be combined to create a blend that is BOTH strongly antibacterial AND strongly antiviral.

Alternatively, single essential oils can be blended together to create new and fascinating aromas, creating a blend that is usually synergistic, meaning the blend is more therapeutic than the singles would have been if used together but separately. In fact, in European circles these essential oil blends are actually referred to as “synergies.”