1. Dry & Dull Skin
The first sign of Vitamin C deficiency is poor skin health. Deficiency in oxidative stress leads to collagen synthesis. As a result, the outermost layer of the skin or epidermis gradually becomes dull and thin. Below this first layer, the retina begins to decay. If you start suffering from a lack of this vitamin for a long time, it will take a long time for the wound to heal.