How to Choose Canned Foods
Canned foods are often overlooked when people talk about healthy eating.
But canned foods can be practical, affordable, and useful for keeping certain foods available for longer.
You can find canned versions of:
- Beans
- Fish
- Tomatoes
- Vegetables
- Fruits
- Soups
- Meat
- Coconut milk
- Other prepared foods
The important thing is not whether a food comes in a can.
It is what is inside the can.
By checking the nutrition label, ingredients, serving size, and package condition, you can make better choices.
What Should You Look for When Buying Canned Food?
Start with these five things:
- The type of food
- The ingredient list
- Nutrition information
- Sodium and added sugar when relevant
- The condition of the can
You should also consider:
- Serving size
- Protein
- Fiber
- Price
- Storage
- Intended use
The right choice depends on the type of canned food you are buying.
Are Canned Foods Healthy?
Canned food is not automatically healthy or unhealthy.
Canning is a method of preserving food.
A can of beans, for example, is nutritionally very different from a can of sweetened fruit or a highly processed canned meal.
The important question is:
What food is being canned, and what ingredients have been added?
Does Canning Destroy Nutrients?
Some nutrients can be affected by processing and heat.
However, canned foods can still provide important nutrients.
For some foods, certain nutrients may remain relatively stable during processing.
The overall nutritional value depends on:
- The food
- Processing method
- Storage
- Time
- Preparation
Therefore, canned food should not automatically be considered nutritionally inferior to fresh food.
Are Canned Vegetables a Good Choice?
They can be.
Canned vegetables can make it easier to keep vegetables available at home.
When choosing canned vegetables, look for:
- Low or moderate sodium when possible
- Minimal added ingredients
- No unnecessary added sugar
If available, vegetables packed without added salt can be useful when you want to control sodium intake.
Are Canned Beans Healthy?
Canned beans can be a convenient source of:
- Protein
- Fiber
- Carbohydrates
- Minerals
Common options include:
- Kidney beans
- Chickpeas
- Black beans
- Pinto beans
- White beans
Check the sodium content, especially if you eat beans frequently.
Should You Rinse Canned Beans?
Rinsing canned beans under running water can remove some of the liquid and reduce some sodium.
It can also improve their taste and texture for certain recipes.
After opening the can:
- Drain the liquid.
- Place the beans in a strainer.
- Rinse with clean running water.
- Drain before using.
If the recipe calls for the canning liquid, you may choose not to rinse them.
What About Canned Fish?
Canned fish can be a convenient source of protein.
Common options include:
- Tuna
- Sardines
- Salmon
- Mackerel
Different fish provide different amounts of nutrients.
Some canned fish are also sources of omega-3 fatty acids.
When choosing canned fish, consider:
- Sodium
- Oil or water packing
- Portion size
- Type of fish
- Ingredient list
Is Canned Tuna Healthy?
Canned tuna can be part of a balanced diet.
It provides protein and can be convenient for:
- Sandwiches
- Salads
- Pasta
- Rice dishes
However, different tuna species can contain different amounts of mercury.
For people who eat fish regularly, choosing a variety of fish can help diversify the diet.
Is Canned Salmon a Good Choice?
Canned salmon can provide:
- Protein
- Omega-3 fatty acids
- Other nutrients
Some canned salmon products also contain edible bones, which can contribute calcium.
Always check the product label because formulations differ.
What About Canned Sardines?
Sardines are small oily fish and can provide:
- Protein
- Omega-3 fatty acids
- Vitamin B12
- Other nutrients
Some products contain edible bones that contribute calcium.
They can be useful when you want a convenient fish option.
Should You Choose Fish Packed in Water or Oil?
Both can be useful.
Packed in water:
- Usually lighter
- May contain fewer calories from the packing liquid
Packed in oil:
- Can provide richer flavor
- May contain more calories
- Can work well in salads and cooking
The best option depends on your preference and overall diet.
How Do You Choose Canned Fruit?
Canned fruit can be convenient, but check the liquid it is packed in.
You may see products packed in:
- Water
- Fruit juice
- Syrup
If you want to limit added sugar, products packed in water or juice may be preferable to those packed in heavy syrup.
Read the nutrition label and ingredient list.
Is Canned Fruit as Healthy as Fresh Fruit?
Canned fruit can still contribute fruit to your diet.
However, products differ.
A fruit packed in water is nutritionally different from a dessert-style fruit product packed in syrup.
Fresh, frozen, and appropriately selected canned fruit can all be useful ways to include fruit in your diet.
What About Canned Tomatoes?
Canned tomatoes can be extremely useful for cooking.
They are commonly used in:
- Pasta sauces
- Soups
- Stews
- Curries
- Rice dishes
Compare products for:
- Sodium
- Added ingredients
- Added sugar when present
Some canned tomato products are very simple, containing mostly tomatoes and salt.
What About Canned Soup?
Canned soup can be convenient, but it is one category where label checking can be particularly useful.
Compare:
- Sodium
- Serving size
- Saturated fat
- Protein
- Added sugars
- Ingredients
Also check how many servings are actually in the can.
A can that looks like one meal may contain multiple servings.
Why Is Serving Size Important?
Serving size can make two products appear more similar or different than they really are.
For example:
Product A:
200 mg sodium per serving
Product B:
400 mg sodium per serving
But if Product A has two servings per can and Product B has one, the comparison changes.
Always check:
Serving size × servings per container.
What Is Sodium?
Sodium is a mineral found naturally in foods and commonly added as salt.
The body needs sodium, but excessive sodium intake can be a concern for some people.
Canned foods can contribute significant sodium depending on the product.
This is why comparing labels can be useful.
How Can You Choose Lower-Sodium Canned Foods?
Look for products labeled with terms such as:
- No salt added
- Unsalted
- Reduced sodium
- Low sodium
However, labeling rules vary by country.
The most reliable approach is to compare the actual nutrition information.
If possible, choose the product with a sodium amount that better fits your dietary needs.
Is “No Salt Added” the Same as “Low Sodium”?
No.
“No salt added” generally means that salt was not added during processing.
The food can still contain naturally occurring sodium.
“Low sodium” refers to a specific nutritional claim that depends on the applicable food-labeling regulations.
Therefore, check the actual sodium amount rather than relying only on front-of-package wording.
What Should You Look for in the Ingredient List?
The ingredient list can help you understand what has been added.
Depending on the product, look for:
- Salt
- Sugar
- Syrups
- Oils
- Preservatives
- Sauces
- Flavorings
A short ingredient list is not automatically healthier.
The important question is whether the ingredients make sense for the product and your dietary needs.
Is BPA Still Used in Cans?
Can linings and packaging materials vary by manufacturer and market.
If packaging materials are important to you, look for information from the manufacturer about the type of packaging used.
Do not assume that every can uses exactly the same material.
How Can You Tell If a Can Is Safe to Use?
Before opening a can, inspect it.
Avoid cans that are:
- Bulging
- Leaking
- Severely rusted
- Deeply dented, particularly around seams
A damaged can may have compromised packaging.
When in doubt, discard it rather than taking a risk.
What Does a Bulging Can Mean?
A bulging can can indicate that gas has formed inside the container.
This may occur because of chemical reactions or microbial activity.
A bulging can should not be opened, tasted, or used.
Discard it safely.
What About Small Dents?
Not every small dent means that a can is unsafe.
A shallow dent away from seams may not necessarily compromise the package.
However, deep dents, especially around seams, can be more concerning.
When a can is significantly damaged, the safest choice is to avoid using it.
How Should Unopened Canned Food Be Stored?
Store unopened cans in a:
- Cool
- Dry
- Clean
place.
Avoid excessive heat and moisture.
Keeping cans organized can also make it easier to use older products first.
How Should You Store Canned Food After Opening?
Once opened, do not automatically store leftover food in the opened can.
Transfer leftovers to a suitable clean container and refrigerate them according to food-safety guidance.
Use leftovers within the recommended timeframe for the specific food.
Can Canned Food Expire?
Canned foods have dates and storage guidance that should be followed.
The meaning of dates can vary depending on the country and product.
A date does not always mean the food becomes immediately unsafe the next day.
However, damaged cans or improperly stored foods can pose risks regardless of the printed date.
When in doubt about safety, discard the food.
Are Canned Foods More Affordable?
They can be.
Canned foods may offer:
- Longer storage
- Less spoilage
- Convenient preparation
- Availability throughout the year
But price varies by product and location.
Compare the price per weight or serving when possible rather than comparing package prices alone.
Can Canned Foods Help Reduce Food Waste?
Yes.
Their long shelf life can make it easier to keep certain foods available without worrying about immediate spoilage.
Examples include:
- Beans
- Tomatoes
- Fish
- Fruit
- Vegetables
They can be particularly useful when fresh produce is unavailable or when you cannot shop frequently.
Are Canned Foods Convenient for Healthy Meals?
Absolutely.
A simple meal can combine:
Canned beans + vegetables + whole grains
or:
Canned fish + vegetables + rice
or:
Canned tomatoes + beans + vegetables
The quality of the meal depends on the complete combination of ingredients.
A Simple Canned Food Shopping Checklist
Before buying a can, ask:
1. What is actually inside?
Look at the ingredient list.
2. How much sodium does it contain?
Especially important for canned soups, sauces, vegetables, and prepared meals.
3. Does it contain added sugar?
Particularly relevant for fruit and sauces.
4. How many servings are in the can?
Check the serving size.
5. Is the can damaged?
Avoid severely damaged, leaking, or bulging cans.
6. How will I use it?
Choose products that fit meals you are actually likely to prepare.
The Simple Takeaway
Canned food can be a useful part of a healthy diet.
Remember:
- Canned food is not automatically unhealthy.
- Check what ingredients have been added.
- Compare sodium when relevant.
- Check added sugar in products such as canned fruit.
- Pay attention to serving size.
- Canned beans and fish can be convenient sources of nutrients.
- Rinsing canned beans can reduce some sodium.
- Choose fish from a variety of sources.
- Avoid bulging, leaking, or severely damaged cans.
- Store unopened cans in a cool, dry place.
- Transfer leftovers to a suitable container after opening.
The simplest rule is:
Don’t judge canned food by the can. Turn it around, read the label, and check the package.
Sources & Further Reading
U.S. Food and Drug Administration
Food labeling, food safety, and consumer guidance.
U.S. Department of Agriculture — Food Safety and Inspection Service
Guidance on canned foods, storage, food safety, and damaged cans.
U.S. Department of Agriculture — FoodData Central
Nutritional information for comparing foods and ingredients.