Our favorite is this brand called Pinhais – in fact you can see several cans of them on our table there! They’re the most expensive sardines I’ve seen here (over $5 per can for their special limited edition one), but they are definitely worth it! Their sardines are more tender than the others I’ve tried here (and I’ve tried quite a few already). Unfortunately, it’s tough to get any of these brands in the US, so I guess it’s a good reason to visit Portugal. However, in the US, you can get quite a few good ones on Amazon – like this Wild Planet Wild Sardines in Extra Virgin Olive Oil.
If you’re interested in finding out more about the health benefits of sardines, then check out these 2 articles (here and here).