Salt
One of the things that attracts the most of this fish is its intense flavor, something that is achieved, in large part, to the large amounts of salt that are added artificially. While sodium that is part of salt is essential to perform some organic functions such as cell homeostasis or the regulation of blood pressure, excessive consumption increases the risk of stroke, as well as attacks Heart.
Intensive fishing
As with other fish species, intensive tuna fishing is under-selling not only the species itself, but also damaging the ecosystems in which they live, since more times than it is received, fishing gear is used that damage its habitat.