Why is canned salmon unhealthy?

Canned salmon is high in protein, and the soft bones in it are high in calcium. Fish contains omega fatty oils, which are good for the heart. However, it should be eaten in moderation. That's because the high sodium content (typical of most canned foods) promotes high blood pressure. Also, some fish contain unacceptably high levels of Mercury. It's a good idea not to eatCanned Salmon more than one or twice a week, and pregnant women should avoid it completely.

Canned foods are not necessarily bad for you if they are packed in natural juices and are not high in sugar and salt. For example, canned tomatoes are often higher in quality than the fresh ones in grocery stores. This is because tomatoes grown for canning are allowed to ripen fully and are packed soon after harvest, whereasshop tomatoes are picked too early, while they're still hard, so that they will survive long journeys by truck with minimal damage.