Zevac syrup contains Zinc Acetate as main active ingredient. Zinc acetate prevents zinc deficiency. Role of key ingredient: Zinc is important for growth and for the development of body tissues. It helps with the growth and repair of tissues in all parts of your body. It is used in to improve growth and for neuro development and cognitive function. Zinc has been found to be very important for boosting up immunity as well. It causes the intestines to make a certain protein which prevents the body to absorbing too much copper from food and prevents damage of liver.