Fresh vs frozen: which is healthier?

Frozen foods are often overlooked in favour of fresh, but research suggests they can be just as nutritious while helping to reduce food waste, save money and make healthy eating easier. Here's how to make the most of your freezer.

Waste less, eat well: why frozen foods deserve a place in a balanced diet

We all have that one ingredient we buy with the best intentions that ends up going to waste. Whether it’s a bag of spinach that’s turned slimy at the back of the fridge, herbs that have wilted before you’ve used them, or fruit bought with the best of intentions but left forgotten about until the end of the week, food waste is something many of us experience. When we’re planning meals, it’s easy to focus on buying fresh while overlooking what’s already in the cupboard or freezer.

New research suggests that this 'fresh-first' mindset could be costing us more than we realise. Half of UK households throw away fresh vegetables every month, yet more than four in ten people say they never waste frozen vegetables. With avoidable food waste estimated to cost families £539 a year, perhaps it's time to rethink the role frozen foods can play in a healthy, balanced diet.

We often buy fresh produce with the best intentions, but busy weeks, changing plans and forgotten ingredients can mean it never gets eaten. The healthiest food isn't simply the freshest – it's the food that makes it onto your plate.

Far from being a second-best option, frozen foods can help us eat well while saving time, reducing waste and making nutritious meals easier to prepare. The key isn't choosing frozen instead of fresh, but knowing when each option – alongside tinned foods and cupboard staples – can work best.

Fresh vs frozen: which is healthier?

For many of us, ‘fresh’ and ‘healthy’ can seem like the same thing. We instinctively head to the fresh fruit and veg aisle, assuming it’s the most nutritious choice, while frozen and tinned foods are often seen as more convenient backups. But when it comes to fresh versus frozen, fresh isn’t always best. 

Once fruit and vegetables are picked, they begin to lose some of their nutrients naturally over time. Vitamins such as vitamin C are particularly sensitive, with foods including green peas, broccoli and green beans losing around half of their vitamin C within the first two days after harvest, while spinach and kale can lose up to 100% of their vitamin C in a week when stored at room temperature, or just 30% when frozen. Fresh produce can also spend days travelling, sitting in warehouses, on supermarket shelves and then in our fridges before it's eaten.

Frozen fruit and veg, on the other hand, are typically picked at their peak ripeness and flash-frozen within hours. This helps lock in nutrients and slows the natural nutrient losses that occur during transport, storage and time spent on supermarket shelves (and in the back of your fridge).

While no single storage method preserves every nutrient perfectly, research shows that frozen produce can be just as – and in some cases, more – nutritious than fresh.

In terms of nutrient content, there isn’t a great difference in frozen compared to fresh, in fact there is more vitamin C in frozen corn, green beans and blueberries compared to fresh and a higher vitamin B content in frozen broccoli.

The go-to guide for healthy eating on a budget

Frozen foods aren't the only store cupboard staple worth considering. Tinned foods can also play an important role in a healthy diet. Tinned foods can also be highly nutritious, with many vitamins and minerals preserved during the canning process. However, remember to keep an eye out for added salt and sugar. 

There's another important factor to consider: fresh produce that ends up in the bin provides no nutritional benefit at all.

Frozen foods can make it easier to keep fruit and vegetables on hand, giving you nutritious ingredients whenever you need them. The latest Frozen in Focus report found that almost a third of people are using their freezer more than they were five years ago, while over half say they turn to their freezer before ordering a takeaway when time is short.

Fresh foods are ideal when you know you'll use them quickly, while frozen options offer flexibility, convenience and less waste. The trick is knowing which foods work particularly well in each format.

Best foods to buy frozen

Not every food benefits from being frozen, but many everyday staples freeze exceptionally well. Keeping a few nutritious essentials on hand can make healthy eating easier on busy days, reduce food waste and help you get more from your food shop. And, according to the frozen in focus report, with 51% of us turning to the freezer before takeaways, being prepared can make a big difference. 

Nutrition professional Georgia Ropek, DipCNM, mBANT, rCNHC, mAoR, recommends making the most of your freezer, whatever its size.

“Maximise your freezer’s potential, even if it’s compact. Stock it with frozen berries, sliced bananas for smoothies, fresh bread, bone broth, frozen peas, salmon, chicken breast, and portions of batch-cooked meals. This ensures you'll always have a quick, nutritious option on hand.” 

Foods that are well worth buying frozen

Some foods are particularly good candidates for buying frozen because they retain their quality well, are easy to portion and help minimise waste.

• Berries – ideal for smoothies, porridge and yoghurt, and often more affordable than fresh when out of season.
• Peas and sweetcorn – picked and frozen quickly after harvesting, making them convenient additions to a wide range of meals.
• Broccoli, spinach and green beans – easy to add to stir-fries, curries, soups and pasta dishes without worrying they'll spoil before you use them.
• Fish and seafood – frozen fish can be just as nutritious as fresh, and means you only need to cook what you need.
• Chicken breast – buying frozen or freezing fresh chicken before its use-by date can help reduce waste and make meal planning easier.

When choosing frozen fruit and vegetables, look for plain varieties without added sauces, butter or seasoning to keep them as close to their natural state as possible.

Foods to freeze yourself

Your freezer isn't just for frozen supermarket products. Many fresh foods can be frozen at home before they reach the end of their shelf life, helping to reduce waste and save money.

Good foods to freeze include:

• sliced bananas for smoothies or baking
• bread, rolls and wraps
• herbs such as parsley and coriander
• grated cheese
• homemade soups, stews and curries
• cooked rice and grains (remember to cool first)
• portions of batch-cooked meals
• homemade stock or bone broth

For the best results, freeze foods as fresh as possible, store them in airtight containers or freezer bags, and label them with the date so you can use the oldest items first. Freezing doesn't improve the quality of food that's already past its best, but it is an excellent way to preserve food while it's still fresh.

Of course, frozen isn't always the right choice. Some foods are better enjoyed fresh, while others work equally well in either form. Knowing which is which can help you build a healthy kitchen that's practical, flexible and wastes less.

We explain more about how to freeze cooking staples while avoiding freezer burn. 

Healthy eating is about balance

When it comes to eating well, there's no need to choose between fresh, frozen and tinned foods. Each has its own benefits, and a combination of all three can help you build nutritious, affordable and sustainable meals.

While fresh produce is perfect for salads, snacks and foods you'll use quickly, frozen and tinned alternatives can make it easier to reduce waste, save money and always have healthy ingredients within reach. Rather than seeing frozen foods as a second-best option, consider them another useful tool that can help support your health and fit around everyday life.

Small changes – such as checking your freezer before shopping, keeping frozen fruit and vegetables on hand, or batch-cooking meals to freeze for busy days – can make a real difference to both your food budget and the amount you throw away.

If you're looking for more ways to make nutritious food stretch further, explore our guide to healthy eating on a budget, which includes practical tips on smart shopping, meal planning and making the most of the food you buy. Or find out more about how working with a nutrition professional can help you have a healthy, balanced diet.

Healthy eating isn't about filling your trolley with the freshest food – it's about choosing foods you're likely to use, enjoy and eat. Whether they're fresh, frozen or tinned, they all have a place in a healthy, balanced diet.