From 2012 this review was aimed at helping healthcare professionals evaluate the form(s) of niacin best suited for a particular therapeutic goal. Providing a literature-based evaluation of risk for NA, extended-release NA, inositol hexanicotinate (IHN) and nicotinamide.
MacKay, D., Hathcock, J., & Guarneri, E. (2012). Niacin: chemical forms, bioavailability, and health effects. Nutrition reviews, 70(6), 357–366. https://doi.org/10.1111/j.1753-4887.2012.00479.x