When you choose doTERRA, you are choosing essential oils gently and carefully distilled from plants that have been patiently harvested at the perfect moment by experienced growers from around the world for ideal extract composition and efficacy.

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Each doTERRA essential oil is also carefully and thoroughly tested using the strict CPTG Certified Pure Therapeutic Grade® quality protocol. Experienced essential oil users will immediately recognize the superior quality standard for naturally safe, purely effective therapeutic-grade doTERRA essential oils.  

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While there is a science to the distillation of essential oils, it is also an art. Distillers not only rely on years of experience, they also employ modern technologies and techniques. 

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The most common method of extracting essential oils is a low-heat steam distillation process. In this process, pressurized steam is circulated through plant material. The essential oils are liberated from the plant and carried away by the steam. When the steam cools, the water and oils naturally separate and the oil is collected. To ensure the highest quality oil extract with the correct chemical composition, the temperature and pressure must be closely monitored. Too little heat or pressure and the oil will not release; too much, and the oil’s composition and potency will be affected. 
 

您所选的精油，得到世界各地的种植者的悉心栽植和照顾，在最适当的阶段收成，然后经过最严谨的蒸馏提取最理想的萃取物，达至最高效能。每瓶dōTERRA精油都通过最高标准，而且严谨及全面的「CPTG®专业纯正调理级认证」检验。凡是对精油有经验的人，马上就能看得出dōTERRA专业纯正调理级认证的精油天然安全、纯正有效，品质卓越，超过一般的标准。

 

精油的蒸馏法不仅是一门科学，更是一门艺术，这不只要依赖多年的经验，也需要使用现代的技术和做法。

 

最常见的精油萃取法是低温蒸气蒸馏法。在此过程中，被加压的蒸气会在植物原料之间循环，精油便随着蒸气从植物中释放出来，待蒸气冷却之后，油水自然分离，此时便能收集到精油。为了确保能萃取到品质最高且化学组成最正确的精油，温度和压力皆必须被严格控管。若温度或压力的值过低，精油便无法萃取；反之，则会影响精油的组合物与效力。