Compositions containing a combination of nicotinamide riboside and pterostilbene for treating skin disorders, and methods of treating skin disorders using these compositions and their equivalents are described. The skin disorders that are treated using these compositions or methods include sun exposure-related skin disorders, inflammatory skin disorders, autoimmune disease-related skin disorders and cancer-related skin disorders. In one embodiment, the compositions containing a combination of nicotinamide riboside and pterostilbene are prepared as oral formulations.
