Lettuce has been a great source of vitamin A and vitamin K.
It is the perfect origin of folate and iron.
Contaminated lettuce might cause bacterial outbreak.
It may cause viral outbreak.
It also causes parasitic outbreak in human being.
There are American settlers who believe smallpox might be stopped prevented by taking lettuce.
There is Iranian belief related to consumption of seeds.
They have been affected by typhoid.
Folk medicine experts believe it can reduce pain.
Lettuce can control rheumatism.
Lettuce can reduce tension.
Lettuce can reduce nervousness.
It can control cough.
Yazidi people of northern Iraq are prohibited from taking the plant.