Boost the Immune System with Infection-Fighting Foods. Take advantage of the following natural foods when battling a cold or flu:
Try the BRAT Diet. Immediately following stomach flu, it is best to consume fluids and broths. On day two, try BRAT. Commonly used for children with upset stomachs, this natural remedy of bananas, rice, applesauce and dry toast really works!
Eat garlic, which has powerful antibacterial compounds that help the body fight infection. A close relative with similar antibacterial agents is onion. Cook with onions and leeks when you or family members have a cold.
Blueberries help to curb diarrhea, and they have aspirin-like properties, which may help to reduce fever and soothe aches and pains.
Try eating cranberries to prevent bacteria from invading the bladder and urinary tract.
Chili peppers help to open sinuses and clear the buildup of mucus in the lungs. Other helpful foods for reducing nasal congestion and mucus are mustard and horseradish.
Try a cup of tea as a natural cold and flu remedy. Catechin, a phytochemical found in black and green teas is said to have antibiotic and anti-diarrheal properties.
Steer clear of processed foods and sugar when battling illness as junk foods take a toll on the digestive system.