Why you should avoid eating iceberg or romaine lettuce

With more than 2,000 varieties of lettuce available, picking the right one can feel overwhelming. But not all leaves are created equal—some offer far more in the way of vitamins, antioxidants, and nutrients than others. And according to nutrition experts, certain popular varieties, like iceberg and sucrine, may not be the healthiest choice for your plate.

Why compact lettuces fall short

Iceberg, sucrine, and other “headed” lettuces grow with tightly packed leaves that limit their exposure to sunlight. This lack of direct light means fewer opportunities for the leaves to develop antioxidants and beneficial plant compounds.

As dietitian Nathalie Majcher points out, the nutritional gap is noticeable—these compact lettuces simply can’t match the vitamin content of their looser, more open-leafed cousins. While they may be crisp and refreshing, they’re far less rich in key nutrients that support long-term health.

The case for darker, open-leaf greens

If you’ve ever pushed aside your grandparents’ bowl of deep purple or dark green salad leaves, it might be time to reconsider. Darker lettuces such as oak leaf, frisée, batavia, treviso, and escarole pack a far greater nutrient density.

The deeper the colour, the higher the levels of beta-carotene, vitamin K, vitamin B9 (folate), and polyphenols—powerful plant compounds linked to reduced inflammation and improved heart health.

A simple swap for better nutrition

You don’t have to abandon lettuce altogether—just choose varieties that give you more nutritional return for every bite. Switching from iceberg or sucrine to darker, open-leaf greens is an easy upgrade that can significantly boost your daily intake of essential vitamins and antioxidants.

Next time you shop for salad, let colour be your guide. The more vibrant and varied your leaves, the more your body (and taste buds) will thank you.