what vitamin are you lacking when you bruise easily?
Posted March 20, 2012. You are right on the money to assume that easy bruising can be a sign of nutritional deficiency. A deficiency of vitamin C, iron and vitamin K is usually associated with easy bruising. I would look for a vitamin C product which contains bioflavonoids, like Ultra C 1000 by Metagenics. Bioflavonoids enhance the activity of vitamin C in the body. After a few months, you will notice that the bruising will improve.