Carotenoids are tetraterpenoids, which are a large and varied class of hydrocarbons produced by plants, particularly conifers (wow, that sounded text-booky, eh?) They are either carotenes (oil soluble) or xanthophylls (more polar, water soluble with oxygen functional groups) with 40 carbon atoms. I’ll be going into more detail about terpenes and terpenoids in the near…

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