When people think about high-protein fish, salmon is often one of the first foods that comes to mind. Salmon is nutritious, flavorful, and rich in protein and omega-3 fatty acids—but it can also be relatively expensive, especially when purchased fresh.

The good news is that you don't need to rely on salmon to get plenty of high-quality protein from seafood.

Sardines are one affordable option worth considering. They are small, nutrient-dense fish that can provide a substantial amount of protein while often costing considerably less than fresh salmon. Depending on the brand, location, and whether you're buying fresh or canned seafood, prices can vary significantly, so it's better to think of sardines as a budget-friendly alternative rather than assuming they are always a specific number of times cheaper.

And there's more to sardines than their price.

They provide protein, omega-3 fats, vitamin B12, vitamin D, selenium and when eaten with their soft edible bones an impressive amount of calcium.

Let's take a closer look at why this humble fish deserves more attention.

1. Sardines Are Surprisingly High in Protein

Protein is essential for almost every part of the body.

It helps maintain:

• Muscles

• Skin

• Hair

• Enzymes

• Hormones

• Immune function

• Body tissues

Sardines are a complete protein source, meaning they provide all nine essential amino acids that your body cannot produce on its own.

Depending on the species and preparation, a typical serving of sardines can provide roughly 20–25 grams of protein per 100 grams.

That's comparable to many other popular protein-rich foods.

For people trying to maintain muscle while losing weight, adding protein-rich foods such as fish to meals can make it easier to meet daily protein needs while keeping meals satisfying.

2. They Can Cost Much Less Than Salmon

One of the biggest advantages of sardines is affordability.

Fresh salmon can become expensive, particularly when buying premium cuts or larger portions.

Sardines, especially canned sardines, are often considerably more affordable.

This makes them useful for people who want to eat more seafood without significantly increasing their grocery bill.

However, seafood prices vary depending on:

• Country

• Season

• Brand

• Packaging

• Fresh versus canned

• Fish species

• Retailer

So rather than focusing on a fixed "five times cheaper" claim, the important point is that sardines can offer an economical way to add nutrient-rich seafood to your diet.

3. Sardines Are Rich in Omega-3 Fatty Acids

Sardines are also a source of EPA and DHA, two long-chain omega-3 fatty acids.

These fats have been extensively studied for their role in cardiovascular and overall health.

Omega-3 fatty acids are involved in:

• Normal heart function

• Brain function

• Cell membranes

• Regulation of inflammatory processes

Eating fish regularly can be part of a heart-healthy dietary pattern.

For people who don't eat fish often, adding sardines once or twice a week can be an easy way to increase seafood intake.

4. They Provide Vitamin B12

Vitamin B12 is particularly important for:

• Normal red blood cell formation

• Nervous system function

• DNA production

Sardines are naturally rich in vitamin B12.

This makes them particularly useful for people who don't regularly consume other B12-rich foods such as meat, eggs, dairy products, or other seafood.

A deficiency in vitamin B12 can cause symptoms such as fatigue, weakness, numbness, and neurological problems, although these symptoms can have many other causes.

5. Sardines Can Provide Calcium

Here's one of the most interesting things about sardines.

Many canned sardines are sold with their soft, edible bones.

Because these bones are small and softened during processing, they can be eaten safely when the product is prepared for consumption.

Those tiny bones are a significant source of calcium.

Calcium is essential for:

• Strong bones

• Teeth

• Muscle contraction

• Nerve signaling

• Normal blood clotting

This makes sardines particularly interesting for people who don't consume much dairy.

6. They're a Source of Vitamin D

Vitamin D helps the body absorb calcium and supports normal bone and muscle function.

Food sources of vitamin D are relatively limited compared with many other nutrients.

Fatty fish—including sardines—can contribute to dietary vitamin D intake.

However, the amount can vary considerably depending on the species and product.

Sun exposure and fortified foods may also contribute significantly to vitamin D status.

7. Selenium Supports Normal Body Functions

Sardines also contain selenium, an essential trace mineral.

Selenium is involved in:

• Thyroid hormone metabolism

• Antioxidant defense

• Immune function

• DNA synthesis

You only need relatively small amounts, but adequate selenium intake is important.

Eating a varied diet usually provides enough for most people.

8. Sardines Can Be a Smart Choice for Weight Management

If you're trying to lose weight, protein can be particularly useful because it tends to be filling.

A meal containing sufficient protein may help you feel satisfied for longer than a meal dominated by refined carbohydrates.

Sardines can be combined with:

• Leafy greens

• Tomatoes

• Cucumbers

• Whole grains

• Beans

• Potatoes

• Vegetables

This creates a nutrient-dense meal without requiring expensive ingredients.

However, sardines themselves aren't a "fat-burning" food.

Weight loss still depends primarily on maintaining an appropriate calorie deficit over time.

9. Canned Sardines Can Be Extremely Convenient

One major advantage of sardines is convenience.

Unlike fresh fish, canned sardines:

• Don't require refrigeration before opening.

• Have a long shelf life.

• Require little or no preparation.

• Can be eaten immediately.

• Are easy to add to quick meals.

You can put them into:

A Salad

Combine sardines with lettuce, tomatoes, cucumber, beans, and olive oil.

Whole-Grain Toast

Add sardines, tomato, lemon, and herbs for a quick high-protein breakfast or lunch.

Pasta

Mix sardines with whole-grain pasta, garlic, tomatoes, and vegetables.

Rice Bowls

Combine sardines with rice, vegetables, seaweed, and a light sauce.

10. They're a Good Alternative to Processed Meat

Replacing some processed meats with fish can improve the overall quality of your diet.

Instead of eating processed meat every day, consider rotating protein sources:

• Sardines

• Salmon

• Tuna

• Eggs

• Chicken

• Beans

• Lentils

• Tofu

Dietary variety helps you obtain different nutrients while preventing your meals from becoming repetitive.

What About Mercury?

This is an important consideration when choosing seafood.

Different fish species accumulate different amounts of mercury.

Sardines are generally considered a lower-mercury fish, especially compared with large predatory fish such as shark, swordfish, king mackerel, and some types of tuna.

One reason is their position lower on the food chain.

Nevertheless, seafood consumption should still follow local dietary guidance, particularly for:

• Pregnant people

• Breastfeeding individuals

• Young children

Choosing a variety of lower-mercury seafood is generally a sensible approach.

What Should You Look for When Buying Canned Sardines?

Not all canned sardines are identical.

Check the nutrition label and ingredient list.

Watch the Sodium

Some canned sardines contain considerable amounts of sodium.

If you're trying to reduce sodium intake, look for:

• Low-sodium versions

• No-salt-added options

Check the Oil

Sardines may be packed in:

• Water

• Olive oil

• Vegetable oils

• Tomato sauce

• Other sauces

Oil-packed sardines aren't necessarily unhealthy, but they can contain more calories.

Look at the Ingredients

A shorter ingredient list can make it easier to understand what you're eating.

How Often Should You Eat Fish?

For general health, many dietary guidelines recommend eating seafood regularly, commonly around two servings per week, depending on the guidance in your country.

The key is variety.

You don't have to eat sardines every day.

You can rotate:

Sardines → salmon → trout → other low-mercury fish → sardines

This provides a broader range of nutrients while helping reduce dependence on any single seafood source.

Sardines vs. Salmon: Which Is Better?

There's no simple winner.

Salmon

Often provides:

• High-quality protein

• EPA and DHA omega-3 fats

• Vitamin D

• B vitamins

Sardines

Can provide:

• High-quality protein

• EPA and DHA omega-3 fats

• Vitamin B12

• Vitamin D

• Selenium

• Calcium when bones are included

The biggest difference may come down to price, taste, availability, and personal preference.

You don't have to choose one exclusively.

A varied seafood diet can include both.

A Simple Sardine Meal for a Busy Day

Try this easy combination:

High-Protein Sardine Bowl

Combine:

• 1 serving of sardines

• Brown rice or potatoes

• Spinach or mixed greens

• Tomatoes

• Cucumber

• Lemon juice

• A small amount of olive oil

• Black pepper and herbs

You get protein, healthy fats, vegetables, fiber, and several important micronutrients in one meal.

And the entire meal can be prepared in just a few minutes.

Who Should Be Careful?

Although sardines are nutritious, they're not appropriate for everyone in unlimited amounts.

People with certain health conditions may need to monitor their intake of:

• Sodium

• Purines

• Calories

• Specific nutrients

Sardines are relatively high in purines, which can be relevant for people with gout or certain uric-acid-related conditions.

People with seafood allergies should also avoid sardines.

If you have a medical condition or have been advised to follow a specific diet, consult your healthcare professional before making major dietary changes.

The Bottom Line

You don't need to spend a lot of money on salmon to include nutritious fish in your diet.

Sardines are an affordable, protein-rich seafood option that also provides omega-3 fatty acids, vitamin B12, selenium, vitamin D, and when their edible bones are included - calcium.

They can be especially convenient when purchased canned, making them an excellent pantry staple for quick lunches and dinners.

The exact price difference between sardines and salmon depends on where you live, the brand, and whether you're buying fresh or canned products. But in many markets, sardines can provide excellent nutritional value for considerably less money.

Rather than searching for one "perfect" fish, think about building variety into your diet. Rotate different types of seafood, pair them with vegetables and whole grains, and choose lower-mercury options more often.

Sometimes, the most nutritious foods aren't the most expensive ones.

A simple can of sardines may be one of the most budget-friendly ways to add high-quality protein and valuable nutrients to your meals.