Table 1: Reference age-related values for urinary oxalate, glycolate, and L-glycerate excretion (adapted from [8]).

Units Normal values Oxalate Glycolate L-Glycerate mmol/1.73 m² per day <0.5 <0.5 μmol/l <5 mmol/mol creatinine  0–6 months <325–360 <363–425 14–205  7–24 months <132–174 <245–293 14–205  2–5 years <98–101 <191–229 14–205  5–14 years <70–82 <166–186 23–138  >16 years <40 <99–125 <138