Probably healthier than real tuna:
"From 2014 to 2019, 108 tuna samples, canned or unprocessed, were checked at the laboratory of the Istituto Zooprofilattico Sperimentale della Puglia e della Basilicata (Italy). One canned tuna was non-compliant for cadmium (0.22 mg kg-1
), and twelve fresh tuna samples (11% of total) showed mercury content above the permitted level. Mean mercury concentrations in fresh and canned tuna (0.517 and 0.207 mg kg-1
, respectively) confirm that this element represents a serious toxicological issue. Exposition to mercury, and markedly in its organic form, due to tuna consumption, was found to be significant and may pose a risk for the most sensitive consumer groups (i.e., children)."
https://www.sciencedirect.com/science/a ... 7520313430