MECHANISM ENGINE
What Is Autophagy?
This is the one people ask me about most, and the one I get most cautious about, because it’s easy to oversell. I can’t show you my autophagy on a blood test. What I can show you is when the research says it ramps up, and let you draw your own conclusions.
The Council Round
Autophagy is the council round. Not the bins that get emptied every week, the proper clear-out, the one where they come and take away the old fridge, the broken furniture, the stuff that’s just been sitting there taking up space. Cells accumulate their own version of that over time, damaged proteins, worn-out components. Autophagy is the process that goes round, tags the junk, and clears it out so the cell can rebuild with fresh materials. It doesn’t happen on the normal weekly schedule. It happens when the body senses there’s a genuine gap where no new deliveries are coming in.
Autophagy is the cellular process of breaking down and recycling damaged or unnecessary components. It’s happening at some baseline level all the time, but research suggests it increases significantly during extended periods without food, once glycogen is depleted and insulin has dropped. Exactly when it ramps up, and by how much, in a given person, isn’t something that can be directly measured outside a lab. That’s the honest limit of what’s known.
Autophagy is well established in laboratory research, with fasting identified as one trigger; direct human measurement outside research settings is not currently available, so timing estimates come from broader physiological research rather than personal testing.
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Related mechanisms
Educational only, not medical advice. Speak to your GP before changing your fasting pattern, diet, or medication.
What this is based on
NHS and NICE guidance, cross-referenced against Neil’s own NHS blood test record going back to April 2012. See the full timeline and current numbers.