doTerra oils are certified pure tested grade - aka CPTG.
When you have a Certified Pure Test Grade, it means these oils are completely pure and potent. Pure means there are no foreign contaminants or fillers. Potent means that each plant was grown in a part of the world where that plant grows best, resulting in the absolute best chemistry for that plant. When you have the ideal natural chemistry, the essential oil extracted does exactly what we want it to do for our health.