i wouldnt worry about preservatives. million of bodybuilder use caned tuna a a source of there weekly protein. in terms of mercury, the cdc says 3-5 cans a week is fine. others say no more than 3 cans a week. i have eaten way more than that in a week and have been fine. guess i all depends on you. tuna salad cups prob have more preservatives so you should just get canned tuna and make your own home made tuna salads with quality ingrediants.



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