SAT-NAC, also known as Niacinamide or Nicotinamide, is one of the two primary forms of Vitamin B3, alongside Nicotinic Acid. As an essential nutrient, it plays a crucial role in numerous cellular processes, supporting overall skin health and function. Unlike Nicotinic Acid, SAT-NAC does not cause flushing, making it a preferred choice in dermatological and cosmetic applications.