Essential Oils are often very powerful. However, if the Essential Oils are carefully blended, their singular properties can be greatly enhanced. The "synergy" between the oils becomes much more powerful than the individual oils. Such blends are referred to as Synergy Blends. These Essential Oil Blends are 100% natural and pure. Carefully blended, they are a convenient & cost effective addition to Carrier Oils, Diffusers, Foot Soaks, Sea Salt Scrubs, etc.