For the purposes of aromatherapy, cold or expeller pressed oils are preferred over hot solvent extracted oils which use hexane. As it turns, the oils are squeezed out and then filtered. All carrier oils contain vitamins, minerals and fatty acids in varying proportions and benefit both the skin and overall health. Unlike essential oils, the molecules in vegetable oils are too large to pass through the skin and must be ingested to provide internal health benefits. The stability of a vegetable oil depends on its fatty acid content.
Vitamin E inhibits oxidation and adds to the shelf life of an oil.
We include Vitamin E in all of our lotions and massage oils. Any vegetable oil will eventually oxidize and become rancid. Keeping the oils in a cool, dark place will extend their shelf life. If stored properly, any vegetable oil will keep for at least 6 months. All Essential Oils are packaged in 2 ounce bottles unless noted.