Why is Nicomenthyl so important for skin barrier integrity?

Because, once absorbed through skin barrier, Nicomenthyl slowly releases niacin (Vitamin B3) into the skin. Niacin is the precursor of coenzyme NAD (Nicotinamide Adenine Dinucleotide), that is the most important biochemical factor responsible for skin barrier integrity. NAD is used in over 450 biochemical reactions, most of which are involved with crucial anabolic and catabolic functions, such as: cell energy production (ATP), chromosome stability, DNA repair, immune cell signaling, redox reactions, epidermal renewal, cell longevity mechanisms, etc.