Most healthy adults can count on their immune systems to fight off infection, but even the heartiest immune system can't fight off every infection. You can give it a little support when trying to fight off a cold by supplementing your diet with vitamins and minerals. Let's start with the first cold-fighter that comes to mind for most of us: vitamin C.
Vitamin C is an antioxidant, and like other antioxidants such as vitamin E, selenium and beta-carotene (which the body turns into vitamin A), it helps keep our bodies free from infection and fight off infections that do strike. Don't consider them protection from colds, though -- while there are conflicting results about the ability of vitamin C to protect you from catching a cold, the vitamin will likely only help to reduce your symptoms.
In addition to adding more antioxidant-rich foods and supplements to your cold-fighting diet, also consider zinc. While the verdict is still out, zinc may help your body produce more white blood cells, your immune system's key infection fighters.