Home > Diet and nutrition > Healthy Food > Vegetables Updated 27 February 2013 Cos lettuce Cos lettuce is linked to a reduced risk of cancers. It is also a good source of folate and helps to protect against age-related macular degeneration. 0 Vit & Min doses per day » Count calories in food » Is my vegetarian diet balanced? » Ask The Dietitians » Cos lettuce is linked to a reduced risk of cancers. It is also a good source of folate and helps to protect against age-related macular degeneration. The dark outer leaves are the richest in carotenoids. Cos lettuce must be refrigerated and eaten as soon as possible, as the vitamin C content reduces the longer it is kept.These can be eaten freely as they have a low calorie content. Calories 16 Fibre 1,2g Potassium 220mg Folate 55mcg Per 100g NEXT ON HEALTH24X Noakes being charged for having different view – lawyer 2017-04-04 20:50 More: Healthy FoodVegetables advertisement Read Health24’s Comments Policy Comment on this story 0 comments Comments have been closed for this article. Logout Comment 0 characters remaining Share on Facebook Loading comments... From our sponsors K Naomi takes a stand and shows women how to fight back WIN a R2000 Skin Renewal voucher! Constipation in women SA's old diesel vehicles continue to fuel allergies Live healthier Are you sure? » Aid your digestion What are digestive disorders? Are you really constipated? Many people think that if they do not have two or more bowel movements every single day of their lives they are constipated. This is patently not true, writes DietDoc. True of False? » SEE: How anaphylactic shock affects your body Stop believing these 10 allergy myths Do you still believe that hay fever is caused by hay? Or that food allergies are really common? No, and no again. We bust 10 myths about allergies.