Every single batch of essential oils that are received at Young Living's laboratories, whether grown at the Young Living farms or in a foreign country, is quarantined, inspected, and tested for purity and quality.

Samples are sent to independent laboratories for analysis by state-of-the-art high-resolution gas chromatography, mass spectroscopy, and infrared spectral analysis.

These tests unmask the chemical anatomy of each oil, exposing oils that may be impure, adulterated, or even improperly distilled. Some oils are subjected to further levels of testing at labs in England, France, and at Weber State University.

Altogether, oils may go through five separate levels of quality analysis before they are released.

Relying on certificates of analysis by independent labs is important in determining whether the oils you buy are therapeutic-grade, since the results of in-house, supplier-based labs may easily be distorted for self-serving ends.

Simply showing higher peaks of desirable constituents does not necessarily mean the oil is either pure or superior. Higher peaks could, in fact, mean an oil is spiked with synthetics or inexpensive essential oil fractions. A rich and varied chemical profile is a far more important measure of quality and purity.

The Young Living mission is to help you find nature's most powerful solutions for your needs. And we know it may take time to find the right combinations of supplements and essential oils that work best for you. So, if you are not satisfied with any of your purchases, for any reason, you may receive a full refund within 30 days, or exchange your purchase for something else for 90 days.