Vitamin C is a water soluble vitamin which cannot be stored in the body and has to be taken on a daily basis, well known as a cold and Flu fighter. It is an important antioxidant that the body uses to keep it strong and healthy. An adequate daily intake is Recommended. VITAMIN D3 – Supports normal immune function, Improves metabolism, fights against the Virus and Bacterial infections and susceptibility for respiratory tract infections as well ( the serum vitamin d level is found by default low in asians and indians with recommended levels approved is from 30-- to 60 nano moles. Hence an adequate daily intake is Recommended.