Romaine lettuce is a common variety of lettuce which is showing to have higher health benefits than other common lettuce varieties.
In this study, the authors found that romaine lettuce was high in vitamin C and phenolic compounds, both of which have potent antioxidant effects.
It was also found that these phenolic compounds protected neurons from oxidative damage. This means that a regular intake of romaine lettuce may help to prevent neurodegenerative conditions such as dementia, Alzheimers and memory loss.
Im et al 2010, Journal of Medicinal Food.