Body stages Stage 1 of 11
0–4 h
Fed state
Your last meal is still being absorbed. Insulin is high, and the body is storing energy rather than drawing on it.
What studies measured
Post-meal glucose and insulin peak; the liver stores glycogen.
How it may feel
Ordinary digestion.
What to do
Record the end of your last meal as hour 0. Drink normally.
Sources
- Deru 2021The Effects of Exercise on β-Hydroxybutyrate Concentrations over a 36-h Fast: A Randomized Crossover Study. Med Sci Sports Exerc, 2021.
- Cahill 2006Fuel metabolism in starvation. Annu Rev Nutr, 2006.
What studies measured in healthy adults, not a reading of your own body. Stop and seek help if you feel unwell; the signs to stop for are listed under Stop signs on the safety page.