Fasting Autophagy Timeline Calculator

Work out fasting autophagy timeline instantly with clear inputs, formula shown and shareable results.

About Fasting Autophagy Timeline Calculator

Maps elapsed fasting hours onto the recognised metabolic phases, with glycogen depletion arriving sooner when activity is higher.

Formula

Fasting phases

Absorptive 0-4 h, post-absorptive to about 12-18 h while liver glycogen lasts, early ketosis 16-24 h, established ketosis with autophagy signalling beyond 24 h

Worked example

With the default values below, Fasting Autophagy Timeline Calculator returns Metabolic phase of Early ketosis — fat oxidation and rising ketone bodies. Change any input above and every figure here is recalculated in your browser.

Inputs used

Hours fasted so faraccepts 0–120: 18
Activity during the fastone of Resting, Light activity, Training: Light activity

Results

Metabolic phase: Early ketosis — fat oxidation and rising ketone bodies
Hours until glycogen depletion: 0.00 h
Hours to the 24-hour mark: 6.00 h
Estimated glycogen depletion time: 14.0 h

Step by step

1Values used
2Fasting phases
3Metabolic phase= Early ketosis — fat oxidation and rising ketone bodies
4Hours until glycogen depletion= 0.00 h
5Hours to the 24-hour mark= 6.00 h
6Estimated glycogen depletion time= 14.0 h

Assumptions and limits

The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Is autophagy measurable in people?

Not directly in humans without tissue sampling; the timeline reflects animal work and indirect human markers, so treat it as indicative.

Does exercise change the timeline?

Yes. Training depletes liver and muscle glycogen faster, which brings forward the shift to fat oxidation.