Garlic
For most garlic is what mostly prevents other people come near them. Garlic has built a reputation for being one of the best cold-curing foods, and for a good reason. Garlic is used as a common home remedy for the prevention of colds and other illness. One review looked at whether taking garlic supplements containing allicin reduced the risk of getting a cold.
The placebo group had more than double the number of colds between them than those taking the garlic supplements. However, the researchers concluded that more research is necessary to determine whether or not garlic can help to prevent colds. It is also loaded with many vital minerals and vitamins such as potassium, iron, calcium, magnesium, manganese, zinc, selenium, beta-carotene, zeaxanthin, and Vitamin C.