Humanin
A compound studied for protecting the brain and keeping cells alive and insulin-sensitive as you age. A mitochondrial-derived peptide encoded inside mitochondrial DNA, studied for neuroprotection, insulin sensitivity, and cellular survival.
Humanin: A compound studied for protecting the brain and keeping cells alive and insulin-sensitive as you age. A mitochondrial-derived peptide encoded inside mitochondrial DNA, studied for neuroprotection, insulin sensitivity, and cellular survival. Humanin is a peptide your mitochondria make and secrete.
Humanin is a peptide your mitochondria make and secrete. It's tied to neuroprotection, insulin sensitivity, and cellular survival. Slow, subtle effects, mostly used as a longevity-stack add-on.
Mitochondrial-derived peptide. Naturally produced; exogenous use is a different question.
Not prescribed in conventional medicine.
Who it's for
- →Users running longevity-focused stacks
- →Older adults targeting metabolic and neuroprotective markers
- →Cellular bioenergetics enthusiasts
What to expect
- Week 1
Subtle. Energy and mood lift first for responders.
- Week 4
Cumulative metabolic / cognitive support.
- Week 8
Plateau. Cycle off.
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How it works (mechanism)
Mitochondrial-derived peptide encoded inside mitochondrial DNA. Binds receptors that activate STAT3 and reduce apoptosis, particularly in neurons and pancreatic beta cells.
Dosing protocol
Stacks well with
Side effects
When NOT to use
- ⚠Pregnancy / nursing
- ⚠No data in active malignancy
Bloodwork to monitor
- • Fasting glucose / insulin if running longer
Common mistakes
- • Expecting fast or visible effects (it's slow and subtle)
- • Stacking with too many longevity peptides simultaneously
- • Running indefinitely, limited human safety data
What it actually is
Humanin is a small peptide encoded within mitochondrial DNA, with nuclear-encoded humanin-like sequences also described — one of the same small family as MOTS-c. It was discovered in 2001 in the brain tissue of an Alzheimer's patient, in the region that had survived, which is where its neuroprotective reputation comes from. It has never been approved and there are nine indexed human-trial records, none establishing a clinical outcome.
Humanin appears to act as a cellular survival signal. It interferes with apoptosis — programmed cell death — by binding pro-apoptotic proteins, and it acts on a cell-surface receptor complex to trigger protective signalling. Circulating levels have been reported to fall with age and to be higher in the children of long-lived parents, though the human data on the age association is inconsistent. That is the basis for the longevity interest. That is an association in observational data, not a demonstration that raising it does anything.
Forms, and which is which
Buyer reconstitutes. Research-chemical supply with unverified identity, at doses extrapolated from animal work.
Verdict: The only form, unregulated.
Modified versions used in research because they are far more potent than the native peptide. What is sold is rarely specified as either.
Verdict: Ask which one; the answer is usually unavailable.
Same class of mitochondrially encoded peptides, different proposed actions.
Verdict: Related biology, separately unproven.
Not absorbed intact as an active dose.
Verdict: Not plausible by the route claimed.
What it is claimed to do, graded
The founding observation, demonstrated in cell and animal models of Alzheimer's disease over two decades. Genuinely interesting, entirely preclinical.
Shown in animal models. No human trial.
Observational: levels fall with age and are higher in offspring of long-lived people. Association, and one that does not establish direction of causation.
No human data of any kind.
The reason most people take it. Cell and animal models only.
Grades describe how much human evidence exists for that specific claim, not whether it will work for you or whether it is safe.
Pros and cons
- • Genuinely novel biology — a mitochondrially encoded peptide is a real discovery
- • A substantial preclinical literature spanning two decades
- • The Alzheimer's origin story is real, not marketing
- • No serious harms reported, on no human administration data — absence of reports rather than a safety finding
- • Nine indexed human records, which observe endogenous humanin rather than test giving it, and none establishing a clinical outcome
- • Very short half-life, so how any injected dose produces a sustained effect is unclear
- • The longevity association is observational and could run either direction
- • Anti-apoptotic activity is exactly what you do not want near a cell that should be dying
- • Research-chemical supply with unverified identity
When to stop
- • Any new lump or unexplained weight loss
- • You are undergoing or about to start cancer treatment
- • Injection-site reaction that spreads
- • You are running it continuously with nothing to measure
Interactions
Humanin suppresses apoptosis. Preventing damaged cells from dying is the mechanism you least want near a tumour, and this is a real rather than pro-forma concern.
Many chemotherapy agents work by triggering apoptosis, so an anti-apoptotic signal would be expected to oppose them. Predicted from mechanism rather than demonstrated, and not a risk worth taking during treatment.
Stacking compounds without human evidence makes any effect unattributable.
If the insulin-sensitivity effect is real it works in the same direction.
There is no human interaction literature for this compound.
Is this for you?
- • People who find the mitochondrial-peptide biology interesting and accept they are well ahead of the evidence
- • You have active cancer or any undiagnosed lump — the anti-apoptotic mechanism is the specific concern
- • You are undergoing chemotherapy
- • You are pregnant or nursing
- • You want a measurable result — there is nothing here you can check
The one number
Sources for the claims above
- Humanin and Alzheimer's disease, the beginning of a new field
- Pathophysiological roles in ageing, systematic review
- Role in the regulation of reproduction
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Numbers redacted in this preview. Members get the full answer, on their own stack.
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Common questions about Humanin
Tracked alongside Humanin
Same goal, different aisle — each graded on its own evidence in the Pepdex catalog.
More in Longevity
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