You can safely consume this amount of tuna every week.

The famously healthy Mediterranean diet includes it.

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Fish can contain mercury, and some tuna are rich in mercury. How much is too much?

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The FDA sets nutritional guidelines for children under 12 and pregnant or lactating women.

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It does not regulate mercury in fish for non-eligible people.

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The U.S. Dietary Guidelines recommend eight ounces of fish per week for adults to reap its benefits.

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If you're pregnant, limit yourself to 8–12 ounces of low-mercury fish to avoid mercury overload.

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A five-ounce tuna can has four ounces of fish and one ounce of water or oil.

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