Experts at the Common Cold Research Centre at the University of Cardiff claim that the average adult can expect to catch between two and five colds a year while pre-school children can catch up to eight colds annually. As we grow older we become less susceptible to colds because we generate virus-fighting antibodies. While there is no evidence to support the idea that vitamin C can prevent colds, both it and zinc are vital for a healthy immune system which is the first defence against colds. Fruit and vegetables are rich in vitamin C but if you can’t manage five portions daily then it might be worth taking a supplement. However recent studies have shown that high levels of zinc can actually suppress the immune system so ensure that your supplement provides no more than 100 per cent of the Recommended Daily Amount.
