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.
Dietary Forms. You consume vitamin A in one of two forms. Preformed vitamin A, also known as retinoids, is found in animal sources. Provitamin A carotenoids are from plant sources and include beta-carotene, alpha-carotene and beta-cryptoxanthin.Your body doesnât absorb beta-carotene as efficiently as preformed vitamin A because it must covert the former to retinal or retinol.For example, 12 micrograms of beta-carotene from food is equivalent to 1 microgram of retinol in your body.rovitamin A carotenoids are from plant sources and include beta-carotene, alpha-carotene and beta-cryptoxanthin. Your body doesnât absorb beta-carotene as efficiently as preformed vitamin A because it must covert the former to retinal or retinol.