I was told my home canned 2015 tuna was not good because after a year even if it was still good it had no nutritional value.
Maricopa County Arizona
Thanks for your question. We do not recommend using home canned foods after two years due to decreases in quality of the product. That said, I believe there would still be nutritional value; the protein in the tuna would still be there. But the bottom line is, I would not recommend eating the tuna.