 [ Symptoms ] i am vegetarian i often still get a cold or sinus infection will specific vitamins or foods help prevent this [ Disease ] in my opinion no colds are caused by viruses and no particular foods or vitamin including vitamin c or minerals including zinc has been found to offer cold and viral prevention eat well get a balanced vegetarian diet and take supplemental vitamins if you want it is a proven fact that a healthy lifestyle will be more immunoprotective against diseases but certainly never 100 in our world of germs