Here's another reason to start your day with a good breakfast, it may keep you from sniffling later. For what it's worth, British researchers followed the lifestyle habits of 100 people for 10 weeks. They found that the folks who ate breakfast every morning were less likely to end up with a cold.
Admittedly, they say it could be more of a reflection of an overall healthier lifestyle, but their theory is that good nutrition has some effect on the immune system. Although they didn't follow any particular food for breakfast, they add that the Vitamin C in orange juice may help in fighting colds. If you prefer tomato juice, the Lycopene in tomatoes acts as an antioxidant which also boosts the immune system.
Specifically, the Lycopene in tomatoes acts as an antioxidant, which helps white blood cells resist the damaging effects of free radicals and boosts your immune system. The study was conducted by British researchers at the School of Psychology at Cardiff University.