Hi! I'm Elena, your nutrition expert from Castelló, and today we're going to lower the temperature to talk about one of the most powerful tools in our kitchen: cold storage.
This morning, while I was putting away the groceries, I was thinking about how cold has been humanity's great ally since we used snow or rivers to keep food fresh. Today, thanks to refrigeration and freezing, we can slow down biochemical degradation reactions and, most importantly, inhibit those microorganisms that worry us so much in summer. Did you know that below 3 °C, bacteria stop producing the toxins responsible for foodborne illnesses? Let's look at how to use cold to our advantage.
Refrigeration: The art of positive cold
It consists of keeping food close to 0 °C. It's not just about "putting it in the fridge," but understanding that each food has its exact point so it doesn't lose texture or flavor.
| Product | Ideal temperature | Recommended time |
| Meats | 0-2 °C | 3-4 days |
| Fish and seafood | 1-2 °C | 1-2 days |
| Vegetables | 4 °C | 5-7 days |
| Eggs | 2-4 °C | 2-3 weeks |
A technical tip: Avoid piling food up. Cold air needs to circulate between foods so the temperature stays stable and no warm spots appear where bacteria can grow.
Freezing: Long-term negative cold
Here we're talking about temperatures below -18 °C. The goal is to turn the water in food into ice crystals.
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Fast freezing (Industrial): This is the ideal method. It creates very small crystals that don't break the food's cells, keeping its nutritional properties and texture intact.
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Slow freezing (Home): Because it's slower, the ice crystals are large and elongated. When thawed, these crystals "pierce" the food's fibers, causing it to lose more juices and vitamins.
How to thaw safely
Thawing is almost more important than freezing for the final quality. When ice turns to water, the process slows down and the microbiological risk increases.
Elena's golden rules:
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Always in the fridge: The best way to thaw large pieces (meat or fish) is on the bottom shelf of the fridge, protected by a cloth or container that collects any drips.
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From the freezer to the pot: Vegetables and small pieces of meat or fish can be cooked straight from frozen, without thawing. It's the best way to preserve their nutrients!
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Out of the fridge, only if it's quick: Only if the process will take less than an hour and the food releases very little liquid.
Elena's "Life Tip"
Interrupting the cooking: If you're going to cook something to freeze it (a stew or some legumes), stop cooking about 10 minutes before it's ready. When you reheat it after thawing, it will finish cooking to perfection and won't end up with that unpleasant "overcooked" texture. Your meal prep containers will look freshly made!
Do you plan your thawing in the fridge ahead of time, or are you always caught off guard and end up using the microwave? Tell me your methods!
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