Diethylene glycol (DEG) is a suspected contaminant of glycerin. The U.S. Food and Drug Administration (FDA) has recommended that pharmaceutical manufacturers screen for diethylene glycol contamination in glycerin supplies. Glycerin may be used as a humectant, solvent, sweetener, or filler (among other uses) in dietary supplements. Sections 5.3.6 Industrial Contaminants and 7.5 Test Methods for Industrial Contaminants of NSF/ANSI 173 – Dietary Supplements needs to be updated. |
