I want to know how the tuna can be kept for so long in a can. Do they use preservatives? Or is it just tuna and water (or oil or brine)?
Does canned tuna contain preservatives
canningfood-preservationtuna
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Best Answer
The preserving effect of canning is based on
For your tuna, this means the heat/pressure of the canning process is sufficient to prevent spoilage for a long time.
Special preservatives are typically not necessary. Checking the label should confirm this. If one brand should have choosen to add them nonetheless, you can pick another manufacturer.