The danger of storing potatoes in the fridge: a common habit that can affect your health

Many people believe that keeping potatoes in the fridge is a good way to keep them fresh longer. However, this seemingly harmless habit can have serious health consequences if they are then cooked in certain ways. In this article we explain why you should not store potatoes in the refrigerator, what happens at a chemical level, and what is the best way to store them to avoid risks.

What happens when we store potatoes in the fridge?

When potatoes are stored at low temperatures, such as in a refrigerator (between 4°C and 7°C), a phenomenon known as “cold sweetening” occurs. This process transforms the natural starch of the potato into simple sugars, mainly glucose and fructose, due to the action of specific enzymes.

Although this change may seem harmless, and even improves the sweet taste of the potato, the problem appears when they are cooked at high temperatures, especially when frying.

Acrylamide: a risky substance

When potatoes that have been refrigerated are fried, the combination of high temperatures with the high presence of glucose generates a chemical called acrylamide. This compound has been identified by international organizations as potentially carcinogenic, especially if its consumption is frequent and in high concentrations.

Where else is acrylamide found?

In addition to potato chips, acrylamide can also be formed in foods such as:

• Industrial chips or snacks
• Biscuits and very toasted breads
• Churros and other fried products

For this reason, both food industries and health authorities control their levels in certain products.

Does this mean we can’t eat chips?

Not necessarily. The problem is not in consuming them occasionally, but in the frequency, quantity and way of preparation. The most important thing is to avoid unnecessarily increasing the risk by storing potatoes incorrectly.

What is the correct way to store potatoes?

To reduce risks and maintain their natural properties, the ideal is:

• Store them in a dry and dark place, preferably a cupboard or a ventilated wooden drawer.
• Avoid direct light, as it can cause the potatoes to germinate.
• Do not refrigerate or freeze them, as the cold accelerates the conversion of starch into simple sugars.

What if the potato has already germinated?

Sprouted potatoes contain solanine, a toxic substance that can cause digestive upset, nausea and even poisoning if consumed in large quantities. If a potato is wrinkled, sprouted or green, it is best to discard it.

Conclusion

A simple gesture such as storing potatoes in the fridge can have negative effects on your health if you then cook them at high temperatures. Therefore, it is essential to know how to store them correctly to avoid the formation of toxic substances such as acrylamide. With information and conscious habits, you can continue to enjoy your favorite dishes without putting your well-being at risk.