Message from doTerra about oil safety

The CPTG® ProcessThe CPTG testing begins immediately after distillation with each oil being reviewed for its chemical composition. A second round of testing is carried out at our production facility to ensure that what was distilled and tested is the same essential oil as was received. A third review of the chemistry of the oil is conducted in a three-phase procedure as the oils are packaged into the bottles we use as consumers. Each of these tests confirms that the essential oil is free of contaminants and unexpected alterations during production.
The CPTG Certified Pure Therapeutic Grade quality protocol includes the following tests:
  • Organoleptic testing
  • Microbial testing
  • Gas chromatography
  • Mass spectrometry
  • Fourier Transform Infrared spectroscopy (FTIR)
  • Chirality testing
  • Isotopic analysis
  • Heavy metal testing
Historically, gas chromatography was sufficient to identify individual components in an essential oil. However, as more sophisticated methods for developing synthetic essential oil products formed, further validation methods were needed. Over time, additional testing methods such as mass spectroscopy, chiral analysis, FTIR Scan, carbon isotope analysis and others have been developed to more accurately identify each individual essential oil constituent.

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CPTG Certified Pure Tested Grade
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​The DoTerra Essential Oil Chemistry Handbook