Not all solutions to medical problems cost an arm and a leg. For anyone suffering from peripheral artery disease, an over-the-counter supplement has proved effective at increasing walking endurance. Nicotinamide riboside provides a “new” – and remarkably affordable – option for those with the chronic leg disease, according to a press release from the University of Florida. Over-the-counter supplement that costs just $1.50 can help people with chronic leg diseaseNicotinamide riboside is a form of vitamin B3 (aka niacin). B3 is an important nutrient that every part of your body needs in order to…