Niacinamide brand or generic is one of two forms of vitamin B3, also known as Niacin, that may be taken to help correct a vitamin B3 deficiency that could cause pellagra. This is a systemic disease that can cause diarrhea, dermatitis, or dementia. As vitamin B3 is water-soluble, your body is unable to store this vitamin so your daily diet should consist of fruits, animal protein, and vegetables to keep healthy levels of B3 in your body. If you know your diet is poor, you consume a lot of alcohol, you have Crohn’s disease, anorexia, or other vitamin deficiencies, talk to your doctor about Niacinamide. The generic alternative is not manufactured by the company that makes the brand product.