Skin has been reported to reflect the general inner-health status and aging.Diet and its reflection on skin has always been an interesting topic for scientistsand physicians throughout the centuries worldwide.Nutrients are the chemical substances found in diet. Many nutrients areessential for life, and an adequate amount of nutrients in the diet is necessary forproviding energy, building and maintaining body organs, and for various metabolicprocesses. The skin functions normally when adequate nutrition is provided.The relationship between diet and skin is rather complicated; on one handany dietary imbalance in the form of nutritional deficiency, specific nutrientinadequacy or excess and toxic components can disturb the equilibrium of the skin.Deficiencies of several vitamins, minerals, and fatty acids have clear cutaneousmanifestations. On the other hand skin diseases themselves, may lead to metabolicimbalances and cause nutritional deficiencies. The demand for nutrients in skin isaltered under stress conditions. Excessive inflammation of the skin is known toincrease the requirements for specific nutrients like folic acid and protein. In themean time, the photo-protective potential of antioxidants the effects ofmicronutrient supplementation on the skin immune system and the modulatingeffects of fatty acids on skin disorders have been the subject of a considerablenumber of studies.Several dermatological diseases have been linked to diet and several studieshave thrown light on this possible connection and the role played by diet in suchdiseases. In this review we hereby illustrate the most significant ones. Skin aging consists of two didactically independent, clinically andbiologically, distinct processes. The first is intrinsic skin aging, which representschronological aging and affects skin in the same pattern it affects all internalorgans. The second is extrinsic skin aging, which we view as aged skin and is theresult of external factors and environmental influence. In this review, we also dropthe spotlight on major dietary constituents that may aid in preventing or delayingthese processes.