Table 2

Changes in predominant fuel supply during fasting

Duration of fasting
Predominant fuelConditions associated with impaired fasting tolerance of this duration
6–12GluconeogenesisGSD 0
Disorders of gluconeogenesis
12–24β-Oxidation of fatty acidsFAOD
GH/cortisol deficiency
  • De Leon et al.12

  • FAOD, fatty acid oxidation disorder; GH, growth hormone; GSD, glycogen storage disorder.