Can you measure autophagy in your body?
A reliable, practically deployable test for autophagy does not yet exist. If you want to know how actively your cells are cleaning themselves up, there is currently nowhere you can have that measured.
Directly measuring autophagy with a routine blood draw does not yet exist. The process by which cells clear out their own damaged components takes place deep within cells and tissues. There is no simple test you can order from your GP today.
Researchers are exploring three possible ways to make autophagy visible. The first is tissue analysis: in people with type 2 diabetes, genes have been found in pancreatic tissue that are abnormally active and linked to autophagy. This yields information, but requires tissue samples, not a blood test. Moreover, the follow-up validation was done only in cell cultures, not in patients.
The second route involves measuring small pieces of genetic material that cells pass to one another via vesicles in the blood. These vesicles can be detected in bodily fluids, but the measurement is indirect and the methods are far from standardised. Clinical use does not yet exist.
In the rare muscle disease inclusion body myositis, autophagy biomarkers are being developed for use in scientific research. These have not yet been validated in large groups and are therefore not suitable for routine diagnostics either. All three avenues are preliminary: science is still searching for measurement methods that are reliable, feasible and clinically useful.
All three claims are associational and limited in scope: tissue studies, exploratory laboratory measurements and biomarkers under development. No large clinical validation studies are available.