Most people associate vitamin C with the immune system, and with good reason, but vitamin C plays another important role in our body, namely in the production of collagen. Collagen is a key component in the construction of tissues, cells, organs, bones, and blood vessel walls. To ensure the proper healing and repair of damaged or hardened arteries, caused by arteriosclerosis, vitamin C-rich foods should be consumed regularly. Some of the foods that are highest in vitamin C include strawberries, blueberries, papaya, broccoli and cabbage.