Why CO₂ Extracts Make a Difference
CO₂ extraction does not automatically produce a better botanical extract.
By Eric R. Cêch | Edited by Anita Felice
It produces a different material.
Steam distillation is excellent for many aromatic plants because it captures the volatile compounds that travel with steam. CO₂ extraction works differently. Under pressure, carbon dioxide can recover a broader range of aromatic and oil-soluble constituents, including some heavier or less volatile compounds that steam distillation may leave behind.
For some botanicals, the difference is modest.
For others, it changes the material enough to matter.
Frankincense and Myrrh are good examples: CO₂ extraction can produce a fuller, more resinous expression than steam distillation alone. Ginger can become richer and heavier. German Chamomile retains a different constituent profile because the extraction changes what happens to compounds such as matricin and chamazulene. Comparative research confirms that extraction method materially changes the resulting Chamomile extract.
Then there are botanicals such as Calendula, Sea Buckthorn, and Rosehip, where CO₂ extraction gives us concentrated oil-soluble fractions that steam distillation cannot meaningfully provide.
So the useful question is not:
Is CO₂ better than steam distillation?
It is:
Does the extraction method change something important in this particular botanical?
Sometimes it changes the aroma. Sometimes it changes which constituents are present. Sometimes it gives us access to an entirely different part of the plant. And sometimes the steam-distilled oil remains the material we prefer.
At Ananda, CO₂ is chosen when that difference is worth having.
In practice, that can mean a fuller resin profile in Frankincense or Myrrh, a richer lipophilic extract in Ginger, a different constituent balance in German Chamomile, or access to concentrated carotenoids, fatty acids, and other oil-soluble fractions in materials such as Sea Buckthorn, Rosehip, and Calendula.
We choose the CO₂ form when that change gives the material something we specifically want to work with.
Read the deeper discussion: Why We Use CO₂ Extracts in Some Formulas →
Read the flagship article: CO₂ Extracts vs. Essential Oils: When Does the Difference Matter? →
Reference
Kotnik P, Škerget M, Knez Ž. Supercritical fluid extraction of chamomile flower heads: Comparison with conventional extraction, kinetics and scale-up. Journal of Supercritical Fluids. 2007;43(2):192–198. DOI: 10.1016/j.supflu.2007.02.005.
