Schwarzkopf Professional Fibre Clinix Fortify Shampoo with Niacinamide strengthens the hair from the inside out. Niacinamide is also known as Vitamin B3. It is a powerful antioxidant, used to neutralize the damaging free radicals created by the environment and to reduce signs of aging. Niacinamide is known to protect from heat and all its unwanted side effects.