Many people have heard that eating fish is good for the brain. But can you expect the same brain health benefits from both canned fish and fresh fish?
In short, yes: both types of fish are roughly equivalent in nutrients. Canned fish may contain more sodium than fresh, but it may also contain more calcium. When choosing canned fish, stick to those packed in oil for the best retention of beneficial Omega-3 fatty acids.
For more details on this topic, you can read this article from the New York Times.