Canned sardines are one of those foods that seem almost too convenient to be true. They are affordable, easy to store, quick to prepare, and naturally provide protein and omega-3 fatty acids.

But before you open another can, there are a few things worth knowing.

The problem isn’t necessarily sardines themselves. In many cases, the bigger issue is which product you choose and how you consume it.

Here are five common mistakes that can make canned sardines a less healthy choice.

1. Assuming Every Can Is the Same

Not all canned sardines are created equal.

Different brands can vary considerably in the type of fish used, the preservation liquid, sodium content, and overall quality.

When choosing a can, pay attention to the ingredient list and nutrition label. Also check the appearance of the product once opened.

An unusual smell, strongly metallic taste, or sardines that are excessively mushy may be