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Constituents - What Do Essential Oils Consist Of?

All substances can be broken down into an array of molecules and atoms, and essential oils are no different. Each essential oil can be broken down into an array of different natural chemical constituents.

Many of our modern medicines are a result of analyzing the natural chemical constituents of raw botanicals and distilled essential oils. Common aspirin is one example. White Willow Bark, used over 2,000 years ago by Hippocrates to ease headaches and other muscular pains, contains a natural anti-inflammatory identified in the nineteenth century as salicin. Salicin is a cousin to salicylic/acetylsalicylic acid, more commonly known as aspirin. White Willow Bark is still routinely used by herbalists to more naturally relieve pain and inflammation.

After the analysis and discovery of the benefits of the effective components in essential oils or raw botanicals, chemists routinely isolate these constituents for use in modern medicines. Chemists then derive ways to more inexpensively synthesize these constituents.

The constituents that make up any given essential oil includes chemicals classified into the following groups (this is not a complete list):

  • Acids
  • Alcohols (Monoterpenols and Sesquiterpenols)
  • Aldehydes
  • Coumarins
  • Esthers
  • Esters
  • Ketones
  • Lactones
  • Terpenes (Monoterpenes and Sesquiterpenes)
  • Oxides
  • Phenols

Lavender Oil, as one example, contains a high percentage of the ester known as linalyl acetate. Because of science's ability to isolate and synthesize particular constituents, we must be careful within the practice of aromatherapy to ensure that the essential oils that we use haven't been adulterated with isolated or synthetic compounds.


This topic consists of several separate related articles. Use the links shown below to navigate through the series.

Next: Part 5: Quality vs. Purity - Aren't They the Same Thing?

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