Young Living essential oils are aromatic volatile liquids that cannot go rancid and are powerful antimicrobials. they are highly concentrated and far more potent than dried herbs. The distillation process is what makes essential oils so concentrated. It often requires an entire plant or more to produce a single drop of distilled essential oil. All Young Living oils are quarantined until they have been thoroughly tested. If there are any discrepancies, they are sent out to other labs to be tested again. Because of Gary Young's (the founder and President) commitment to purity, our oils actually have a very complex testing process that they go through. To my knowledge, there is no other company testing their oils as stringently. Our oils are considered medical grade essential oils, and we offer you these amazing products and their natural health benefits at whole sale price with the ability to be shipped directly to your home.