Truly ,vitamin C is a wonderful and powerful medicine everyone should embrace. Not only that is good against cold and flu but also it's mighty work as far as oxidant stress is concern. Vitamin C being naturally an antioxidant prevent us from illnesses that might results from enormous oxidation that happen in our body that may lead to appearance of blood picture anomaly such as Heinz body which lead to anemia and also prevent us from respiratory distress.I am happy that you had the idea of it's important ,please ,don't joke with it and take it always because it will relieve you from your respiratory challenge.