Different types of tuna can vary in size and shape ... For two people, about 100 grams (4 ounces) of sashimi-grade tuna is usually a good starting point, roughly the size of a deck of cards.

while a 1-ounce portion in oil holds up to 8 grams. In this regard, where protein is concerned, choose canned tuna in oil. Canned tuna can be mixed with creamy mayonnaise, vinegary pickles, and tangy ...

Canned tuna is a protein powerhouse, boasting over 20 grams of protein per 5-ounce can. It’s also a source of omega-3 fatty ...

and a whopping 18 grams of protein, per the U.S. Department of Agriculture. This high protein content plus its low number of calories - a five-ounce can of skipjack tuna contains only 80 calories - ...