If you were to bite into a raw olive plucked right off the tree, you’d cringe at the profound bitterness that comes from a compound called oleuropein. Oleuropein exists in the fruit as a protective agent against predators. Only once olives are cured do they shed their bitterness (curing draws out the oleuropein and converts the olives’ natural sugars into lactic acid) and take on those aforementioned appealing olive-y qualities.
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