A living will is one form of advance directive, leaving instructions for treatment. Another form is a specific type of power of attorney or health care proxy, in which the person authorizes someone (an agent) to make decisions on their behalf when they are incapacitated.
Antioxidant vitamins A, C and E may improve blood flow by preventing oxidation of cholesterol, one of the main causative factors in arterial plaque formation, according to a study published in the January 2012 issue of the journal Advances in Clinical and Experimental Medicine..
Vitamin C, like many other vitamins, is an antioxidant, and may have beneficial effects on the heart and other organs. It has been suggested that boosting the blood levels of vitamin C might improve function in blood vessels that have been damaged by years of smoking.