Fig. 1

The metabolic pathways of PG and glycerol used as excipients in syrups and DEG/EG, including the use of glycolate oxidase for the detection of glycolic acid. To simplify this pathway, steps with NAD+ and NADH have been omitted.

The metabolic pathways of PG and glycerol used as excipients in syrups and DEG/EG, including the use of glycolate oxidase for the detection of glycolic acid. To simplify this pathway, steps with NAD+ and NADH have been omitted.