Feeling obliged to defend innocent lettuce from attack on an internet forum:
Depending on the variety, lettuce is an excellent source (20% of the Daily Value, DV, or higher) of vitamin K (97% DV) and vitamin A (21% DV) (table), with higher concentrations of the provitamin A compound, beta-carotene, found in darker green lettuces, such as romaine.[32] With the exception of the iceberg variety, lettuce is also a good source (10–19% DV) of folate and iron (table).[32]


