How Much B12 Is In Canned Tuna Fish?
How Much B12 Is In Canned Tuna Fish? A 3.5-ounce (100-gram) serving of cooked tuna provides 10.9 mcg of vitamin B12. How much B12 is in a can of sardines? Sardines are also an excellent source of vitamin B12. A 100-g serving of canned sardines in oil contains 8.94 mcg of vitamin B12, which is