Study Compares Sustained Release vs “No-Flush” Niacin Formulations
A six-week randomized, double-blind, placebo-controlled trial compared 1,500 mg/day of wax-matrix extended-release niacin with the same dose of inositol hexanicotinate, often marketed as “no-flush” niacin. Wax-matrix niacin significantly reduced total cholesterol, LDL cholesterol, and non-HDL cholesterol while increasing HDL cholesterol. Inositol hexanicotinate produced no significant lipid improvements compared with placebo. A small pharmacokinetic substudy also found evidence of niacin absorption with the wax-matrix formulation but no meaningful bioavailability with inositol hexanicotinate.