Leafy greens are notoriously low-calorie foods, and iceberg lettuce is no exception to the rule. But greens with darker leaves, like kale, spinach, romaine and arugula, do provide more nutrients ...

Once your iceberg starts heading south, that doesn't mean it's ready for the compost bin. If the outer leaves are brown, peel them off and discard them, then check the inside of the lettuce.

Key Points Iceberg lettuce is crisp, refreshing and perfect for adding crunch to any dish. It's lower in nutrients than darker leafy greens but still offers vitamins A and K, plus a bit of fiber.

After the second recall, in 2018, the company stopped serving romaine altogether, offering iceberg lettuce only. But lately, iceberg's developed some problems of its own.

For example, one cup of spinach contains higher levels of vitamin C (14%) and additional vitamin B6, calcium and magnesium, while a cup of kale contains more protein and fiber than iceberg lettuce.