RecruitingDevice studyAccuracy of Lactate Meter in GSDIaThe goal of this observational study is to determine if home lactate meters (both capillary and serum sample) are accurate, compared to lab serum lactate in a population of patients with glycogen storage disease type 1a and to determine if the Accu Chek Guide glucometer (capillary sample) is accurate, in a population of patients with glycogen storage disease type 1a.