what nutrients are in lettuce
Romaine lettuce is super rich in beta-carotene, with approximately 4,094 international unit (IU) of vitamin A in one cup, says the USDA. One cup of iceberg lettuce, however, only contains 361 IU of vitamin A. Vitamin A, a fat-soluble vitamin, is important for your vision, immune system, and reproductive system.
Vitamin Content of Iceberg Lettuce. Iceberg lettuce is an excellent source of vitamin A, K, and C. It is also a good source of thiamin, vitamin B6, and folate (vitamin B).