Canned tuna is a great lean protein option containing iodine, vitamins and minerals, and plenty of health benefits. It is an excellent source of B vitamins, selenium, phosphorus, choline, vitamin D, potassium, and magnesium and delivers those essential omega-3 fatty acids as well. Light tuna contains less mercury than white tuna, and it is best to limit consumption of one or two servings per week to avoid an unwanted buildup of this element, which is harmful in large amounts.

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