I eat a lot of tuna and I’ve noticed that tuna in a more “whole” form (i.e. chunks over shredded, or solid over chunk) has more protein. Why is this? Is protein lost in chunking it up more? What about chewing it?
Also, the other day I noticed on a can of tuna salad (also contains tomato and onion), that the protein value was like half what it normally is. What happened to all the protein?
I think it’s just a difference in packaging density. A can of solid tuna is mostly tuna, with only enough water/oil to fill the gap between tuna and can. Shredded tuna is mixed up with lots of water/oil.
Most likely, the serving size is different.