Nicotinamide is widely used in skincare products due to its anti-inflammatory and antioxidant properties, making it effective in treating acne, reducing redness, and improving skin texture. It is also utilized in the medical field to treat conditions like pellagra, a niacin deficiency disease, and has shown potential in managing diabetes by protecting pancreatic beta cells. Additionally, nicotinamide is being researched for its role in cancer prevention and as a supportive therapy in autoimmune diseases due to its ability to modulate the immune response.