I will never forget the first time I saw olives growing on trees in a rural Italian town. The trees were covered with plump green and black olives that looked just like the ones sold in jars. At first, I wondered why supermarkets didn’t sell them fresh and ready to eat. They looked so appealing that I was tempted to pick one and try it. I soon learned that doing so would be a mistake.

Yes, you can eat an olive straight from the tree, but that does not mean you will enjoy it. Fresh olives contain a natural compound called oleuropein, which gives them an extremely bitter and unpleasant taste. The flavor can be sharp, harsh, mouth-drying, and far different from the salty, rich taste of processed olives. As the original article puts it, the experience was one of a “distinct lack of flavor.” What looks like a delicious snack is actually very difficult to enjoy before it has been treated.

This is the main reason you don’t see fresh olives sitting beside apples, bananas, or oranges at your local grocery store. Most shoppers expect food to be ready to eat with little or no preparation. Selling raw olives would mean offering a product that most customers would find unpleasant, while processed olives are already familiar and enjoyable.

Before olives reach grocery shelves, they must undergo processing to remove much of their natural bitterness and make them suitable for eating. Depending on the type of olive, this can involve methods such as curing in salt, brine, or other solutions. Processing transforms the hard, bitter fruit into the flavorful olives people recognize.

So, the next time you see a jar of olives at the supermarket, remember that they didn’t simply come off the tree ready to eat. The processing is what makes them palatable. Fresh olives may look tempting, but taking a bite straight from the branch is an experience most people probably wouldn’t want to repeat.