Most experts consider Iceberg lettuce the worst kind because it has a very low nutrient content. Iceberg lettuce contains a small amount of calcium, potassium, and phosphorus, and little else. It’s mostly water, and if your pet eats too much, it could cause diarrhea. However, it’s not toxic, and your pet will be fine if it eats some.
When it comes to nutrition, kale is the winner. As you can see, Kale is high in a lot of essential vitamins and minerals. Iceberg lettuce is better for you than potato chips, so I wouldn’t say don’t eat it. But I would say, try romaine, and try kale.
Iceberg lettuce also contains:
While iceberg lettuce lacks the nutrient density of spinach, kale, and even Romaine, it’s the lowest in calories. This may be beneficial to those who are trying to lose weight —since you can ‘t really put a cap on the amount you can consume. How many calories are in a bowl of salad?