When you're trying to calculate the foods your consuming, it can be really damn hard and frustrating! Ok, so here's the deal, my favourite protein source are canned fish, and I can eat about 5 cans per day. Is it okay to consume that much, a can is about 5.5 oz (net weight labeled). I assume that a can has around 20-35 grams of protein. Am I correct? Now comes the frustrating part, This favourite canned food of mine, "Mackerel/Salmon in natural oil"... it doesn't have the nutrition labeled. So I have to look at the site to find but damn, there are so many type of mackerel/salmon out there. How am I supposed to calculate the value if I don't know which type of fish I'm eating? Have any opinions, suggestions? The ingredients, the ingredients listed are only fish(mackerel/salmon), salt and water so it's pretty healthy right? When they say "in natural oil" what does it means? (By the way, I drained the oil first).