INNOVATIVE SCIENTIFIC TESTING
After careful harvesting and distillation , each batch of essential oil is sent to dōTERRA ’ s stateof-the-art lab to be tested . To guarantee the highest level of quality , dōTERRA has created the CPTG Certified Pure Tested Grade™ testing process . With rigorous criteria , the CPTG™ standards certify that dōTERRA oils do not contain added fillers or harmful contaminants , but are pure and authentic .
In order to continually provide essential oil users with a high quality product , dōTERRA strives to stay on top of the most current and advanced testing methods for essential oils . Partnering with academic , industry and scientific experts has allowed dōTERRA to create an innovative testing process that exceeds the standards of other essential oil companies .
The dōTERRA lab and trusted third-party labs employ the following tests to ensure that only the highest quality oils are approved for customer use :
Organoleptic Assessment : An assessment of the appearance , colour and aroma of each oil
Optical Rotation : Can help to identify synthetic additives that do not show up on other tests
Specific Gravity : Verifies the purity and quality of each essential oil
Refractive Index : Measures how light spreads through the oil to ensure it meets dōTERRA standards
Gas Chromatography / Mass Spectroscopy ( GC / MS ): Ensures that the chemistry of each oil matches the expected chemical profile
Contamination Testing : Oils are tested for harmful contaminants , heavy metals and potentially harmful micro-organisms
Fourier Transform Infrared Spectroscopy ( FTIR ): Analyses an oil ’ s material composition to make sure it meets dōTERRA standards
Stability Testing : Helps to ensure that an essential oil will maintain its purity and efficacy for the length of its intended use
In addition to rigorous testing standards , dōTERRA uses the knowledge and expertise of a scientific advisory board that is comprised of experts in chemistry , microbiology , botany , research science , physiology and nutritional science .