G6PC1 and kidney disorder: Early and recent studies (n = 26, GSD1a) [25] and [n = 32; 26 GSD1a, 6 GSD1b] [26] report around 31% of patients with microalbuminuria (abnormal increased excretion rate of albumin in the urine ranging from 30 to 299 mg/g creatinine [27]), mostly associated with hyperfiltration (increased GFR above normal values seen e.g. in early phases of kidney disease [28]).