Posts tagged ‘potatoes’

Tomatoes Lose Flavor in the Fridge

Thanks to modern refrigeration, we can keep our food fresh longer. The problem is that the cool temperatures of the fridge don’t preserve all foods equally—as much as we’d like to believe it. People tend to throw almost everything into the fridge, assuming that it can only help. In reality, not every food item is the same chemically or physically and some will actually be harmed when refrigerated. In a few cases, foods will degrade faster in the fridge and the best case scenario is often loss of flavor.

tomatoes

Tomatoes

Store-bought tomatoes never taste quite the same as tomatoes from the garden or local farm. Luckily, scientists have finally pinpointed the reason. Refrigeration actually turns off genes responsible for producing flavonoids, chemicals that contribute to the flavor of foods. When a tomato is exposed to temperatures below 54 degrees Fahrenheit, these genes begin to shut down permanently. Unfortunately, grocery store tomatoes have generally undergone refrigeration at some point, usually during the shipping process. It might be too late to save them from perpetual blandness but there’s still hope for tomatoes that were home-grown or purchased locally. Don’t store them in the fridge, just leave them on the countertop and they’ll be fine. The lost flavors from refrigeration can at least serve as a motivator for growing your own tomatoes. (more…)

April 10, 2017 at 5:00 am Leave a comment

Potatoes: Green Means Stop

By Chad Upton | Editor

If you eat potatoes, in any form, you’ve probably come across a partially green one.

Most importantly, don’t eat the green part — it’s toxic enough that you may get very ill, and it can cause death in rare cases. Secondly, it’s very bitter, so you’re not going to enjoy it. French fries and potato chips are also affected, so avoid the green stuff there too.

The green coloration is chlorophyll. Like many other plants, chlorophyll is formed with enough exposure to certain types of light. Of course, many green leaves are part of a healthy diet, so it’s not the chlorophyll itself that is the problem.

Exposure to light can also cause another reaction that forms a substance called “solanine.” It is not related to chlorophyll, but is often formed at the same time. Solanine is toxic. 16 ounces of a fully green pototo could be enough to make a 100lb person sick.

The green chlorophyll is a good warning about the presence of solanine, but solanine can form when chlorophyll does not. So, even if the potato looks normal, the bitter taste will serve as a warning.

Cooking a green potato will not help, it’s still toxic. But, a cooked potato cannot turn green since the required enzyme mechanisms are destroyed in cooking.

Bottom line: if it’s green or bitter, skip it.

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Photo: Selva / Eden (cc)

Sources: Purdue, Elkhorn

January 14, 2011 at 2:00 am 8 comments


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