How to Treat a Fever Blister. Fever blisters, also known as cold sores, are caused by the type 1 herpes simplex virus. You wake up one morning with a tingling or burning sensation on your lip and know immediately what's coming within the next day or two: a painful cold sore, also known as a fever blister. Cold sores are caused by the type 1 herpes simplex virus (HSV-1).
Lutein is called a carotenoid vitamin. It is related to beta-carotene and vitamin A. Foods rich in lutein include broccoli, spinach, kale, corn, orange pepper, kiwi fruit, grapes, orange juice, zucchini, and squash. Lutein is absorbed best when it is taken with a high-fat meal.
The nutrients lutein and zeaxanthin both help prevent macular degeneration, according to the American Optometric Association. They are both types of antioxidants called carotenoids. The retina of your eye contains rich deposits of both lutein and zeaxanthin.