Essential oils come in many different types with many different properties. Single essential oils can be added together to create blends for enhanced, broad-spectrum support.
Blends have multiple kinds of essential oils that are mixed together by a formulator. In most cases, blends should only be made by a professional formulator who is knowledgeable of essential oil constituents and the nuances of blending. One essential oil may have constituents that compete with or counteract the constituents of another oil. Blends should therefore be make with care and expertise to avoid dangerous or ineffective blends and combinations.