Nutrients: how to preserve vitamins better
Nutrients don’t vanish from food in an instant, but fresh juice, salad and cut fruit start losing value quickly once they’ve been processed. If you want to actually benefit from fruit and vegetables, the simple things matter: light, air, moisture, time and storage.
Why do nutrients disappear over time?
You can see it clearly in the kitchen. A cut apple turns brown, salad leaves go limp in the bag, and freshly pressed juice already tastes different the next day. Vitamins follow the same pattern. Not all of them disappear at once, but some are quite sensitive to air, light and moisture.
Fresh fruit, vegetables and juices are a good source of vitamins, but only if you handle them wisely. For example, orange juice can lose 100% of its vitamin C content if it has been stored for too long. That doesn’t mean every juice is useless. It means timing and storage conditions matter.
The original comparison set freshly squeezed orange juice against frozen orange juice. The fresh juice contained 86 milligrams of vitamin C per glass. Juice that had spent four weeks on the shelf had just 39-46 milligrams of vitamin C per glass. That’s a big difference, especially if you’re drinking juice precisely for the vitamin.
The simple truth: the more food is exposed to air, light and heat, the more you have to expect a drop in quality. This applies especially to cut fruit, pressed juices, washed greens and packaging that has been open for a long time.
How can you preserve nutrients better?
The best trick is neither expensive nor complicated. Buy smaller amounts, use them up within a reasonable time and keep food as protected as possible. The fridge helps, but only if the food isn’t sitting there uncovered, wet and in the light.
With juice, check the date, not just the taste or the price. If a juice has been sitting for a long time, its vitamin content may be lower than that of a fresh one. Once it’s opened, a new clock starts: air gets into the carton and the contents change faster.
It’s the same with fruit and vegetables. Wash them well, but don’t leave them soaking in water for long. Soaking can wash away some of the water-soluble compounds, and the texture gets worse too. If you wash greens ahead of time, gently dry them before putting them in a container.
Honestly, a large part of preserving vitamins is simply good kitchen organization. Don’t buy more fresh produce than you can eat. Don’t leave cut fruit sitting out on the table. Don’t keep juice in an open carton for days if you already know you won’t finish it.
Six practical rules for everyday use
These principles suit the home kitchen as well as anyone who packs a lunch box for work. The goal isn’t to become anxious about food. The goal is to make small choices so that nutrients keep better.
- When buying juice, make sure it has at least 3-4 weeks left until its expiry date.
- Once you’ve opened a juice carton, finish it in less than four days.
- Wash vegetables well, but don’t soak them for long.
- Store fruit and vegetables in the fridge in a vacuum-sealed plastic container to keep the contents away from moisture, light and air.
- Buy fresh greens often, and no more than 3-4 days’ worth at a time.
- Buy frozen food if you’re sure you won’t be able to restock your food supplies within the next three days.
Frozen food isn’t automatically a worse choice. If you know fresh broccoli or berries would just sit in the fridge, the frozen version may be more practical. This is especially sensible in winter, when fresh produce is pricier and some of it has been in transit for a long time anyway.
It’s also worth thinking about portions. If you’re making a smoothie, use only the amount you’ll drink right away. If you cut fruit ahead of time, put it in a tightly sealed container and keep it cold. The less air in the container, the better.
Nutrients and choosing fresh food at the store
At the store, look first at appearance and shelf life. Wilted greens, damaged produce and juice that has been sitting for a long time aren’t the best choice if your goal is to get more vitamins. A low price can be a good thing, but only if you can use the food up quickly.
If you buy a larger amount, plan it out right away. Eat the most delicate items first: salad leaves, berries, soft fruit and freshly cut produce. Foods that keep longer can wait. That also cuts down on waste.
So what actually happens if a few days slip by? Usually food doesn’t go bad right away, but its value may drop. If the smell, taste or appearance has clearly changed, don’t force yourself to eat it just because you’ve already bought it.
FAQ
Should freshly pressed juice be drunk right away?
It’s best to drink it as quickly as possible. If the juice has to sit, keep it in the fridge in a closed container and avoid leaving it in the light for long.
Are frozen fruit and vegetables a bad choice?
No. If you can’t eat fresh food in time, the frozen version can be better than wilted fresh produce or produce that has sat around too long.
Do you need to wash fruit and vegetables before putting them in the fridge?
If you wash them in advance, dry them thoroughly. Wet greens spoil faster. Sometimes it’s easier to wash them right before eating.
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Author: Muscle&Fitness, translated by Mikk-Alvar Olle
Source: WHO – healthy eating.
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