A lumbar sympathetic nerve block is a special test to help your doctor find the cause of your symptoms. During the test, an anesthetic (numbing) medication is injected near your spine. This âblocksâ the sympathetic nerves in that region.
Lutein is an antioxidant carotenoid a pigmented nutrient that is responsible for the yellow colors of fruits and vegetables and is present in the highest quantities in dark, leafy green vegetables. You're born with a certain amount of lutein in your eye, but your body doesn't reproduce it.
Both lutein and zeaxanthin are primarily found in green leafy vegetables, although zeaxanthin is far scarcer than lutein. Kale and spinach are two of the most lutein-rich foods, but you'll also find it in carrots, squash, and other orange and yellow fruits and vegetables.