Clinical signs of hypoglycemia with plasma glucose concentrations of 55 mg/dL or lower, insulin levels of 3 μU/mL or higher, C-peptide levels of at least 0.6 ng/mL, and proinsulin levels of at least 5.0 pmol/L, along with decreased β-hydroxybutyrate levels of 2.7 mmol/L or less, suggest high endogenous insulin production. Here, INS is linked to Hypoglycemia.