Lemon

Citrus can do wonders to keep the common cold away. It is also essentially antifungal and antiseptic. The high naturally occurring Vitamin C content in lemon makes it a must-have to keep immunity levels high. Foods that are high in vitamin C and other antioxidants may help strengthen the immune system against the germs that cause the common cold and the flu. Squeezing a whole lemon into a glass of hot water with a large spoonful of honey makes a soothing drink for someone with a cough or cold.