FOXO4

Mechanism.

FOXO4 (Forkhead Box O4) is an endogenous transcription factor, not a therapeutic peptide itself. It belongs to the FOXO family of transcription factors that regulate cellular stress responses, metabolism, and apoptosis. In the context of aging research, FOXO4 is notable because it binds to p53 in senescent cells, preventing p53 from triggering apoptosis and thereby keeping senescent 'zombie' cells alive. The therapeutic interest is in disrupting this interaction (see FOXO4-DRI).

Think of p53 as a building demolition expert trying to tear down damaged, non-functional buildings (senescent cells). FOXO4 acts like a security guard that keeps the demolition expert locked in an office, preventing the teardown. The damaged buildings accumulate and cause neighborhood blight (aging).

No independently validated human dosing exists for FOXO4. Provided for educational purposes only — this is not medical advice and not instructions for self-administration. Consult your healthcare provider before making any health decision.

Side effects, rare serious events, who shouldn't.

Every study we cite.

Each study with its published finding and a plain-language note on limitations or funding.

Where you can get it.

Questions to bring.

Every citation, numbered.

Citation list. For our editorial read of each study — including bias flags and quality grades — see the Research log above.

1. 01.
   Targeted apoptosis of senescent cells restores tissue homeostasis in response to chemotoxicity and aging · 2017 · PMID 28340339 ↗