Since the cartilage in your joints is largely made of collagen, low vitamin C levels can result in less padding between bones and achy joints. That paves way for inflammation and swelling, and when your diet is lacking in vitamin C, your body has less ability to respond to that inflammation. Consuming enough vitamin C allows your body to produce the collagen it needs to have healthy, strong joints. Load up on these 10 foods with more vitamin C than an orange.