10 Things to Consider When Buying Are Frozen Fruits And Vegetables As Good As Fresh
Fresh vs Frozen Fruit and Vegetables — Which Are Healthier?
Harvest, Processing and Transportation
Most of the fruits and vegetables you buy are harvested by hand, with a smaller amount being harvested by machinery.
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However, what happens after that varies between fresh and frozen produce.
Fresh Fruit and Vegetables
Most fresh fruits and vegetables are picked before they are ripe. This allows them time to fully ripen during transportation.
It also gives them less time to develop a full range of vitamins, minerals and natural antioxidants.
In the US, fruits and vegetables may spend anywhere from 3 days to several weeks in transit before arriving at a distribution center.
However, the USDA states that some produce, such as apples and pears, can be stored for up to 12 months under controlled conditions before being sold.
During transportation, fresh produce is generally stored in a chilled, controlled atmosphere and treated with chemicals to prevent spoiling.
Once they reach the supermarket, fruits and vegetables may spend an additional 1'3 days on display. They're then stored in people's homes for up to 7 days before being eaten.
Bottom Line:Fresh fruit and vegetables are often picked before they are fully ripe. Transportation and storage can take anywhere from 3 days and up to 12 months for some types of produce.
Frozen Fruit and Vegetables
Fruits and vegetables that will be frozen are generally picked at peak ripeness, when they're the most nutritious.
Once harvested, the vegetables are often washed, blanched, cut, frozen and packaged within a few hours.
Fruits tend not to undergo blanching, as this can greatly affect their texture.
Instead, they can be treated with ascorbic acid (a form of vitamin C) or added sugar to prevent spoiling.
Usually, no chemicals are added to produce before freezing.
Bottom Line:Frozen fruit and vegetables are generally picked at peak ripeness. They are often washed, blanched, frozen and packaged within a few hours of being harvested.
Some Vitamins Are Lost During Processing of Frozen Produce
Generally speaking, freezing helps retain the nutrient content of fruits and vegetables.
However, some nutrients begin to break down when frozen produce is stored for more than a year (2).
Certain nutrients are also lost during the blanching process. In fact, the greatest loss of nutrients occurs at this time.
Blanching takes place prior to freezing, and involves placing the produce in boiling water for a short time ' usually a few minutes.
This kills any harmful bacteria and prevents the loss of flavor, color and texture. Yet it also results in the loss of water-soluble nutrients, such as B-vitamins and vitamin C.
However, this doesn't apply to frozen fruits, which don't undergo blanching.
The extent of nutrient loss varies, depending on the type of vegetable and length of blanching. Generally, losses range from 10'80%, with averages around 50% (3, 4).
One study found that blanching reduced water-soluble antioxidant activity in peas by 30%, and in spinach by 50%. Nonetheless, levels remained constant during storage at '4° F, or '20° C (5).
That being said, some research also suggests that frozen produce may retain its antioxidant activity despite the loss of water-soluble vitamins (6, 7).
Bottom Line:Blanching results in a loss of antioxidants, B-vitamins and vitamin C. However, nutrient levels remain fairly stable after freezing.
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Nutrients in Both Fresh and Frozen Produce Decline During Storage
Shortly after harvesting, fresh fruits and vegetables start to lose moisture, have a greater risk of spoiling and drop in nutrient value.
One study found a decline in nutrients after 3 days of refrigeration, when values fell to levels below those of frozen varieties. This is most common in soft fruits (8).
The vitamin C in fresh vegetables begins to decline immediately after harvesting and continues to do so during storage (2, 5, 9).
For example, green peas have been shown to lose up to 51% of their vitamin C during the first 24'48 hours after harvesting (9).
In vegetables stored chilled or at room temperature, antioxidant activity declined (5).
However, although vitamin C can be easily lost during storage, antioxidants like carotenoids and phenolics may actually increase.
This is possibly due to continued ripening and is seen in some fruits (8, 10).
Bottom Line:Certain vitamins and antioxidants begin to decline immediately after harvesting. Therefore, it's best to eat fresh fruits and vegetables as soon as possible.
Take Home Message
Freshly picked fruits and vegetables straight from the farm or your own garden are of the highest quality.
However, if you are shopping at the supermarket, frozen produce may be equal to, or in some cases, even more nutritious than fresh varieties.
At the end of the day, frozen fruit and vegetables are a convenient and cost-effective alternative to fresh options.
It's best to choose a mix of fresh and frozen produce to ensure you get the best range of nutrients.
10 reasons to buy frozen vegetables and fruits - Canada's Food Guide
1. They're just as nutritious as fresh
Produce is picked at its peak of freshness and frozen right away.
Tip: Use food labels to choose frozen produce with little to no added sodium, sugar, or saturated fat.
2. You can save money
You can stock up on frozen produce when it's on sale. Check your local grocery store flyers and compare prices.
3. They save you time
The washing and cutting are done for you. Look for frozen produce in the form that you need ' whole, sliced, or chopped.
Tip: Try keeping 1 or 2 kinds of frozen vegetables and fruits on hand for quick and easy meal or snack prep.
4. You can reduce food waste
Need a vegetable or fruit for a recipe, but not sure you'll use it all? Frozen produce allows you to use only what you need, and save the rest for a later date.
5. You have more choices
Some vegetables and fruits are not available fresh throughout the year. Buying frozen vegetables and fruits can give you more variety all year round.
6. They have many uses
Frozen vegetables and fruits are great for so many recipes. For example:
- use frozen butternut squash cubes for a quick puréed soup
- thaw frozen berries to add to your favourite muffin or loaf recipe
- add frozen peach slices to yogurt for summer flavours during the winter
- sauté frozen vegetables for a stir-fry, or steam and season them for a side dish
7. They should make up half your meal
Frozen vegetables and fruits can help you eat plenty of vegetables and fruits each day.
8. They last longer
Frozen produce does not spoil as quickly as fresh vegetables and fruits.
9. They cook faster than fresh vegetables
Many vegetables are blanched before freezing. Blanched vegetables cook quickly, saving you time.
Tip: Add frozen broccoli to a pot of boiling pasta in the last minute of cooking. Strain the broccoli and pasta, then top with your favourite pasta sauce.
10. They're flavourful all year round
Fresh produce is frozen when its flavour is at its peak.
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