White Tuna is bad @ss.
Cholesteral gets a bad name too. While too much can be bad, we do need some in the diet for our health.
Most canned goods are high in salt. But if you eat healthy the salt issue well, will not become an issue (unless your overally sensative to it). I have eaten any where from 2 to 4 cans of white tuna (per day, along with other good sources of protein).
If your other souce foods are good, dont be concerned with this GREAT food. The fat content in Tuna, is a good source of fats in the diet, and are one of the preferred sources. (I believe salmon to be better though, its a little (not much but little) higher in fatty acids).
Sort of off topic, but food for thought: Tuna has absolutely no carbs to speak of. Which is a different angle of argument when the fat begins to drop, and one may have to revert to a Deficit diet or small surplus diet in conjunction with a Ketogenic attempt to tweak tha last little bit off the lower end (another look in another thread). A ketogenic attempt can be difficult, primarily due to the fact that it is flat difficult to get away from carbs, and nearly causes a whole new stock of food and planning.
Rock with tuna. Its a powerful food to consume.