Br J Dermatol 1994
Animal and test-tube studies indicate that they also affect tissue repair and wound healing ( Chapped lips are a common symptom of deficiencies, especially in folate (vitamin B9), riboflavin (vitamin B2), and vitamins B6 and B12 ( People with disorders that affect nutrient absorption such as celiac disease, chronic gastritis, and Crohns disease are especially susceptible to deficiencies ( Given that vitamin B12 is found primarily in animal products, vegans and vegetarians may also be at a higher risk of deficiency ( Furthermore, a deficiency in B vitamins may lead to dermatitis, depression, irritability, and fatigue ( summary Deficiencies in multiple nutrients, including iron, zinc, and B vitamins, can cause chapped lips

POWERFUL ANTIOXIDANT: Reduced Glutathione acts as a powerful antioxidant that may help protect cells from free radicals and reactive oxygen species.* SKIN & IMMUNE SUPPORT: Reduced L-Glutathione may support the immune system by helping immune cell regulation, as well as cytokine promotion
As vitamin A is present in retinoids from animals and carotenoids from plants, it is readily supplied for most people
Greater free plasma VEGF and lower soluble VEGF receptor-1 in acute mountain sickness
In fact, glutathione is present in cells at levels comparable to other essential compounds such as glucose, potassium, and cholesterolhighlighting its importance in normal cellular function