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The new rating system shows that eating the right amount of vegetables can lower your risk of heart disease by nearly 20%. Westend61/Getty Images

How unhealthy is red meat? And how beneficial is it to eat vegetables? A new rating system could help you cut through the health guidelines

Health guidelines can feel contradictory and hard to interpret. But a new star rating system should help consumers and policymakers better parse the evidence behind health risks and outcomes.

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