Compound Profile · Longevity / Cellular Health Hub
Mitochondrial-derived peptide (MDP) · cytoprotective & neuroprotective signal
A peptide your own mitochondria write — encoded not in the cell's nucleus but inside mitochondrial DNA itself. Humanin is one of the body's built-in "stay alive under stress" signals, and one of the most credible longevity-associated molecules in human biology. It's also mostly preclinical, and this profile keeps those two facts side by side.
Why This Page Exists
Humanin is genuinely fascinating: a peptide the mitochondria produce to protect cells, whose levels track with aging and, in some studies, with human longevity. That makes it a magnet for hype. The honest version is more interesting than the hype: a real endogenous signal with strong mechanistic and animal support, and human data that is still mostly associative. This page holds both — the promise and the ceiling of what's actually known.
Regulatory Status
Humanin is a research peptide, not FDA-approved for any indication. It is studied in laboratory and animal models and early human investigation.
Humanin is naturally produced from mitochondrial DNA and circulates in human blood. Its levels are measurable and decline with age.
Not a mainstream sport-doping target, but classification can shift — competitive athletes should confirm current status.
Research often uses more stable, more potent analogs (e.g., the "HNG" variant) than native humanin — relevant when interpreting study doses.
Mechanism of Action
Humanin belongs to a class called mitochondrial-derived peptides (MDPs), encoded within the mitochondrial genome rather than the nucleus. This places it at the center of how mitochondria communicate their status to the rest of the cell and body — retrograde signaling from the cell's power plants.
mtDNA (16S rRNA region) → Humanin → cytoprotective & metabolic signalingA core action is suppressing programmed cell death, in part through interaction with pro-apoptotic proteins such as BAX. In practical terms, humanin helps stressed cells survive insults that would otherwise kill them — the basis of its cytoprotective and neuroprotective reputation.
Humanin engages IGF-binding-protein and metabolic signaling, linking it to insulin sensitivity, metabolic stress resistance, and the same longevity pathways studied across the MDP family. This is where its metabolic and healthspan interest comes from.
Higher circulating humanin has been observed in long-lived individuals and their offspring, and levels fall with age. That makes humanin a candidate biomarker and mediator of healthspan — an association that is real and repeatedly observed, but not the same as proof that supplementing it extends human life.
Primary Use Cases
Evidence Summary
| Domain | Type | Key finding |
|---|---|---|
| Neuroprotection | Preclinical | Protects neurons from apoptosis and toxicity in Alzheimer's and stress models; among the earliest and strongest mechanistic findings. |
| Longevity association | Human observational | Higher circulating humanin in long-lived people and their offspring; age-related decline in levels. |
| Metabolic protection | Animal | Improved insulin sensitivity and tissue protection under metabolic stress. |
| Cytoprotection (multi-organ) | Preclinical | Cardiac, retinal, and vascular protection in oxidative/ischemic injury models. |
Protocols
Human dosing is not established by clinical trials; the reference ranges below come from research analogs and community practice, and warrant physician oversight given the thin human record.
Potency varies dramatically between native humanin and stabilized analogs (e.g., HNG), so a single "standard dose" is misleading. Any protocol should specify which form it refers to.
Typically used in defined courses rather than open-ended, and most rationally as part of a longevity/cellular-health strategy rather than a standalone fix.
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