Difference in appearance: Romaine lettuce has a long oval shape, thicker leaves, wrinkled leaf surface and dark green color. The shape of the ordinary lettuce is flat, thin leaves, leaf surface is smooth, the color is light green.

The taste is different: Romaine lettuce has a crunchy, slightly bitter taste, suitable for eating raw or making salads. Common lettuce has a softer, slightly sweeter texture and is suitable for stir-fry or soup.

Nutritional value is different: Romaine lettuce and lettuce are rich in vitamins and minerals, such as vitamin C, vitamin E, calcium, iron and so on. But Romaine lettuce also contains a kind of substance called "lettuce lettuce", has a sedative, sleeping effect. In addition, Romaine lettuce also contains some beneficial compounds, such as flavonoids, polyphenols, etc., with antioxidant, anti-inflammatory effect.