Watch mercury levels: Tuna, a lean protein, low in saturated fat, good source of selenium and is naturally rich in vitamin d. It provides omega-3 essential fatty acids too. The downside is that tuna can also be contaminated with mercury. For more info - http://www.Livestrong.Com/article/371519-danger-in-eating-too-much-canned-tuna/.
Answered 4/30/2014
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