Before you open another can of sardines, check this out!

Canned sardines are a familiar staple in many kitchens around the world. They are inexpensive, easy to store, and packed with nutrients, which is why they are often considered one of the healthiest quick meal options. Rich in protein, omega-3 fatty acids, vitamins, and minerals, sardines can support heart health, brain function, and overall nutrition.

However, despite their reputation as a healthy food, the way sardines are selected and consumed can significantly affect their impact on the body. Many people unknowingly make small mistakes when eating canned sardines, and these habits—repeated over time—can reduce some of the nutritional benefits.

The goal is not to avoid sardines altogether, but rather to understand how to choose and eat them in a healthier way.

Below are five common mistakes people make when consuming canned sardines.

1. Assuming All Canned Sardines Are the Same

A common misconception is that every can of sardines offers the same quality and nutritional value.

In reality, there can be significant differences between brands and production methods. Some manufacturers process fresh fish quickly after catching them, which helps preserve nutrients and flavor. Others may rely on lower-quality raw materials or longer processing times.

When choosing canned sardines, it can be helpful to pay attention to details such as:

The type of liquid used for preservation

The appearance and firmness of the fish

Any strong metallic smell or unusual taste

Sardines that appear overly soft or broken apart

These factors can sometimes signal lower product quality.

2. Consuming the Liquid from the Can

Many people eat sardines directly from the can without draining the liquid in which they are stored.

Depending on the product, that liquid may contain higher levels of sodium or oils used during the preservation process. Regularly consuming it can increase daily salt intake without much nutritional benefit.

Excess sodium consumption may contribute to:

Fluid retention

Increased blood pressure

Additional strain on the cardiovascular system

Draining the sardines before eating them helps reduce unnecessary salt and oil while keeping most of the beneficial nutrients.

3. Eating Sardines Too Frequently

Sardines are highly nutritious, but relying on them as a daily food source may not be ideal.

Like many canned foods, they often contain more sodium than fresh alternatives. In addition, while sardines generally contain lower levels of heavy metals than larger fish species, excessive long-term consumption of any single seafood product can increase cumulative exposure.

A balanced diet usually benefits from variety. Instead of eating sardines every day, it may be better to rotate them with other protein sources such as:

Fresh fish

Eggs

Legumes

Poultry or lean meats

4. Choosing Sardines Preserved in Low-Quality Oils

Another frequently overlooked issue is the type of oil used in canned sardines.

Some products are preserved in refined vegetable oils that may contain high levels of omega-6 fatty acids. During the high-temperature sterilization process used in canning, these oils can degrade and form compounds that may contribute to inflammation when consumed in excess.

Since sardines are naturally rich in beneficial omega-3 fats, pairing them with poor-quality oils can disrupt the nutritional balance.

Healthier choices often include sardines preserved in:

Olive oil

Water

Other higher-quality oils

5. Ignoring the Internal Lining of the Can

One of the least discussed factors involves the inside coating of metal cans.

Many cans are lined with protective resins that prevent corrosion. Some of these coatings historically contained compounds related to bisphenol A (BPA) or similar substances.

Under heat during the sterilization process, tiny amounts of these compounds can migrate into the food. Over time, repeated exposure to certain endocrine-disrupting chemicals has been associated in research with hormonal and metabolic concerns.

For this reason, some consumers prefer products labeled BPA-free or choose to alternate canned foods with fresh alternatives.

Healthier Ways to Enjoy Canned Sardines
If sardines are part of your diet, a few simple habits can help maximize their benefits:

Drain the liquid from the can before eating

Choose products packed in olive oil or water

Check labels for quality ingredients and BPA-free packaging

Combine sardines with vegetables, salads, or whole grains

Include them as part of a varied diet rather than a daily staple

Canned sardines remain a nutritious and practical food option. They offer high-quality protein, beneficial fatty acids, and important vitamins and minerals.

However, like many processed foods, their health impact depends largely on how they are selected and consumed. By paying attention to factors such as oil quality, sodium content, and packaging, small adjustments can help ensure that sardines remain a healthy part of a balanced diet rather than an overlooked source of unnecessary risks.