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Why You Never See Fresh Olives at the Grocery Store

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If given a choice, most grocery shoppers prefer fresh produce over something that's been pumped full of preservatives. Yet shoppers are almost never given that choice when it comes to olives. The small, meaty fruits can be found floating in brines, packed in cans, and stuffed with pimentos, but they're hardly ever shipped to the store straight off the tree. As the video series Reactions explains, there's a good reason for that.

In their natural state, because they contain high concentrations of a bitter-tasting compound called oleuropein, fresh olives are practically inedible. To make the food palatable, olive producers have to get rid of these nasty-tasting chemicals, either by soaking them in water, fermenting them in salt brine, or treating them with sodium hydroxide.

Because of its speed, food manufacturers prefer the sodium hydroxide method. Commonly known as lye, sodium hydroxide accelerates the chemical breakdown of oleuropein into compounds that have a less aggressive taste. While other processes can take several weeks to work, sodium hydroxide only takes one week.

Afterward, the olives are washed to remove the caustic lye, then packed with water and salt to extend their shelf life, giving them their distinct briny flavor.

For more on the chemistry of olives, check out the full video from Reactions below.

[h/t Reactions]

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TASCHEN
Everything You Need to Know About Food in One Book
TASCHEN
TASCHEN

If you find yourself mixing up nigiri and sashimi at sushi restaurants or don’t know which fruits are in season, then this is the book for you. Food & Drink Infographics, published by TASCHEN, is a colorful and comprehensive guide to all things food and drink.

The book combines tips and tricks with historical context about the ways in which different civilizations illustrated and documented the foods they ate, as well as how humans went from hunter-gatherers to modern-day epicureans. As for the infographics, there’s a helpful graphic explaining the number of servings provided by different cake sizes, a heat index of various chilies, a chart of cheeses, and a guide to Italian cold cuts, among other delectable charts.

The 480-page coffee table book, which can be purchased on Amazon for $56, is written in three languages: English, French, and German. The infographics themselves come from various sources, and the text is provided by Simone Klabin, a New York City-based writer and lecturer on film, art, culture, and children’s media.

Keep scrolling to see a few of the infographics featured in the book.

An infographic about cheese
TASCHEN

An infographic about cakes
Courtesy of TASCHEN

An infographic about fruits in season
Courtesy of TASCHEN
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'Lime Disease' Could Give You a Nasty Rash This Summer
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iStock

A cold Corona or virgin margarita is best enjoyed by the pool, but watch where you’re squeezing those limes. As Slate illustrates in a new video, there’s a lesser-known “lime disease,” and it can give you a nasty skin rash if you’re not careful.

When lime juice comes into contact with your skin and is then exposed to UV rays, it can cause a chemical reaction that results in phytophotodermatitis. It looks a little like a poison ivy reaction or sun poisoning, and some of the symptoms include redness, blistering, and inflammation. It’s the same reaction caused by a corrosive sap on the giant hogweed, an invasive weed that’s spreading throughout the U.S.

"Lime disease" may sound random, but it’s a lot more common than you might think. Dermatologist Barry D. Goldman tells Slate he sees cases of the skin condition almost daily in the summer. Some people have even reported receiving second-degree burns as a result of the citric acid from lime juice. According to the Mayo Clinic, the chemical that causes phytophotodermatitis can also be found in wild parsnip, wild dill, wild parsley, buttercups, and other citrus fruits.

To play it safe, keep your limes confined to the great indoors or wash your hands with soap after handling the fruit. You can learn more about phytophotodermatitis by checking out Slate’s video below.

[h/t Slate]

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