Peptide

Humanin

Also known as

HN · mitochondrial-derived peptide humanin · MDP humanin · MT-RNR2 peptide · MTRNR2-encoded peptide · HNG (S14G-humanin analog) · S14G-HN · S14G-humanin · Humanin-G · HNGF6A · Colivelin (related potent derivative) · MAPRGFSCLLLLTSEIDLPVKRRA

Community talk. May contain inaccuracies. Not medical advice. Not a protocol. Not for human or animal use.

What it is

Mitochondrial peptide	A short cell-survival signal discussed for healthy aging, brain resilience and metabolic health. Natural levels do not establish a need for supplementation.
Humanin is not HNG	Native Humanin, HNG/S14G and HNGF6A are different molecules. Laboratory potency differences are not human dose-conversion rules.

Notes

Humanin is a mitochondrial-derived peptide discussed for healthy aging, brain resilience and metabolic health. Some users report better sleep or calm; others notice nothing. Native Humanin and the stronger analog HNG are different molecules, and neither has an established therapeutic human regimen.

A mitochondrial survival signal. Humanin is a short peptide linked to mitochondrial DNA. Researchers study how it helps stressed cells resist programmed cell death. Biohackers call it a longevity or mitochondrial peptide; that name does not mean an injection replaces an age-related deficiency. Humanin Promotes Tumor Progression in Experimental Triple Negative Breast Cancer (Animal context · Accessed 2026-09-30) · Humanin experiences (Community discussion · Accessed 2026-09-30)

Humanin, HNG and other derivatives are different molecules. HNG, also called S14G-Humanin, changes one building block in native Humanin. HNGF6A is another analog with different clearance behavior. Forum amounts cannot move between those identities, and greater activity in a laboratory assay is not a human dose-conversion rule. Humanin (Community discussion · Accessed 2026-09-30) · Pharmacokinetics and tissue distribution of humanin and its analogues in male rodents (Animal context · Accessed 2026-09-30)

Source context — Humanin Promotes Tumor Progression in Experimental Triple Negative Breast Cancer: Experimental TNBC cells and tumor-bearing mice plus human tissue expression. Does not quantify cancer risk in human users or establish an HNG dose. Nature webpage subsequently redirected/failed; API full text accessible.

Source context — Humanin experiences: One explicit no-perceptible-effect statement with no amount/route; other participants are interested non-users. No controlled or long-term outcome evidence. Relative dates not converted.

Source context — Humanin: Anonymous self-experiments; identity and adverse effects unverified. #20 is retrospective and involves other agents; not confirmation of causation. Supplier/cost material excluded.

Source context — Pharmacokinetics and tissue distribution of humanin and its analogues in male rodents: Fresh abstract confirms HNG/HNGF6A IP routes, species and IGFBP-3 differences but omits exact 30 min/>4 h. Numerical details retain previous source-bound extraction status, not new full-text verification. PubMed/PMC follow-ups blocked and fullTextXML returned HTTP 500.

What people notice

Sleep or calm	Isolated accounts describe uninterrupted sleep or possible anxiety relief; the anxiety reporter explicitly suspected placebo.
No noticeable effect	A separate user noticed nothing in the short or medium term. The records do not establish dependable energy, cognition or longevity benefits.
Conflicting sleep history	A combined-dose poster's later accounts conflict about ever using Humanin and include MOTS-c and Epitalon. That story is separate from the one-week sleep report.

Notes

Sleep or calm, sometimes no noticeable change. One user described uninterrupted sleep and another possible anxiety relief. A separate account noticed nothing in the short or medium term. These reports do not establish a reliable energy boost or cognitive improvement. MOTS-c, Humanin, Ipamorelin Mod-GRF stack (Personal report · Accessed 2026-09-30) · Humanin Stability (Community discussion · Accessed 2026-09-30) · Humanin experiences (Community discussion · Accessed 2026-09-30)

Native Humanin: 500 mcg once in one account. The poster explicitly distinguished it from HNG and suspected placebo behind reduced anxiety. Route was not stated in that reply. Another HN user described 5 mg once weekly alongside 5 mg MOTS-c twice weekly. Humanin Stability (Community discussion · Accessed 2026-09-30)

Aging, brain resilience and metabolic health. Discussion centers on protecting cells, maintaining cognition and supporting insulin sensitivity. These are sought benefits rather than established outcomes from injecting Humanin. Higher natural levels in children of centenarians are an association; they do not prove supplementation extends life. Humanin experiences (Community discussion · Accessed 2026-09-30) · The mitochondrial derived peptide humanin is a regulator of lifespan and healthspan (Animal context · Accessed 2026-09-30)

The sleep story is more complicated than a positive testimonial. The combined-dose poster initially noticed no added effect, later mentioned better sleep while also using Epitalon, and elsewhere said Humanin had never been tried. The separate one-week sleep account should not be merged with that contradictory history. MOTS-c, Humanin, Ipamorelin Mod-GRF stack (Personal report · Accessed 2026-09-30)

Source context — MOTS-c, Humanin, Ipamorelin Mod-GRF stack: Anonymous products and routes not independently verified. Same-author reports conflict: described combined use, then said Humanin never tried. MOTS-c and Epitalon confound outcomes. Relative dates not treated as publication dates.

Source context — Humanin Stability: Unverified material, short subjective exposure, no measured solution stability. Copied 25–50 mcg is not a confirmed HNG regimen; rat conversion is a secondhand proposal. No preparation instructions reproduced.

Source context — The mitochondrial derived peptide humanin is a regulator of lifespan and healthspan: Combines experimental animals and human observational biomarkers; no Humanin injection intervention in people. Cell/animal benefits are not community dose evidence. PMC webpage was browser-check blocked; API full text accessible.

Doses people talk about

Native Humanin accounts	500 mcg once, route unstated, in one report. A different user described 5 mg weekly alongside MOTS-c 5 mg twice weekly.
Unverified Humanin identity	2 mg every other day for one week appears in a sleep report. Another account used 5 mg Humanin plus 5 mg MOTS-c per combined administration, with conflicting later history.
HNG/S14G experiment	One forum user tried 0.4 mg and 1 mg SubQ. Frequency was not stated; these are personal amounts, not a therapeutic band.
Daily chart bands	100–300 mcg, 500–750 mcg and 1–2 mg total daily appear in separate SubQ/HNG-oriented charts, sometimes split AM/PM. They are not verified user cohorts.
Weekly totals versus each use	One chart camp gives 1–5 mg total weekly over 2–3 SubQ injections. Another gives 1–5 mg each time, 2–5 times weekly, with some nasal talk. Those totals differ substantially.

Notes

Unverified “Humanin”: 2 mg every other day or combined 5 mg amounts. The first is a one-week sleep report. Another account used 5 mg Humanin plus 5 mg MOTS-c per combined administration and later described Humanin every 4–5 days; the same author's exposure history conflicts. MOTS-c, Humanin, Ipamorelin Mod-GRF stack (Personal report · Accessed 2026-09-30)

HNG/S14G: 0.4 mg and 1 mg SubQ in a forum experiment. A LongeCity user identified S14G and reported trying these amounts without immediate issues; frequency was unspecified. This is a firsthand amount, not a therapeutic range. Humanin (Community discussion · Accessed 2026-09-30)

Other chart lore: 100–300, 500–750 mcg, or 1–2 mg total daily. Community charts give these separate SubQ/HNG-oriented bands, sometimes splitting daily amounts AM/PM. Some show 0.5 mg daily in the first week, increasing toward 1–2 mg. These are chart claims, not verified user cohorts or instructions.

Weekly totals differ from per-injection amounts. Other community charts give 1–5 mg total weekly split over 2–3 SubQ injections, whereas another camp gives 1–5 mg per administration 2–5 times weekly, sometimes discussing nasal use. They must stay separate. Nasal discussion is thinner; capsules are not the established community form.

Half-life, onset & duration

Felt onset	Possible calm followed one native-Humanin exposure without a clock. A separate user noticed better sleep after the second exposure within a week.
Felt duration	Unknown per dose. Eight hours asleep is not eight hours of drug action; feeling well two months after a sequential stack cannot isolate Humanin persistence.
Half-life	Human clearance remains unknown. About 30 minutes in mice and over four hours in rats concern injected HNG animal experiments, not native-Humanin or human SubQ measurements.

Notes

A single exposure or the second exposure in isolated reports. The native-Humanin anxiety impression followed one 500 mcg use, with no precise clock and acknowledged placebo uncertainty. The 2 mg every-other-day user noticed uninterrupted sleep after the second exposure within the first week. Humanin Stability (Community discussion · Accessed 2026-09-30) · MOTS-c, Humanin, Ipamorelin Mod-GRF stack (Personal report · Accessed 2026-09-30)

No dependable onset window. Another user noticed no short- or medium-term effect. Community-chart talk of reassessing around weeks 3–4, or gradual changes around weeks 4–8, describes observation periods rather than demonstrated onset. Humanin experiences (Community discussion · Accessed 2026-09-30)

Hours per dose cannot be established from these reports. Sleeping eight uninterrupted hours describes that night's sleep, not eight hours of drug action. The single-exposure anxiety account gives no reliable end time. MOTS-c, Humanin, Ipamorelin Mod-GRF stack (Personal report · Accessed 2026-09-30) · Humanin Stability (Community discussion · Accessed 2026-09-30)

Two months after stopping in one sequential stack. A user still felt well after SS-31, then MOTS-c, then Humanin. That retrospective impression cannot isolate Humanin, establish a washout period or prove continued cellular protection. SS-31 and anti aging (Personal report · Accessed 2026-09-30)

Human elimination half-life remains unknown. Jacked Forums states that human kinetics are not established. Daily or several-times-weekly schedules in charts are habits and extrapolations; they do not measure blood clearance. Humanin — Dosage, Half-Life & Reconstitution (Community guide · Accessed 2026-09-30)

Rodent kinetics: about 30 minutes in mice, over four hours in rats. These figures come from male-rodent research using HNG and a different injection route. Clearance also varied by analog and binding to a blood protein, IGFBP-3. They cannot establish how long native Humanin or HNG remains in a human user. Pharmacokinetics and tissue distribution of humanin and its analogues in male rodents (Animal context · Accessed 2026-09-30)

Source context — SS-31 and anti aging: Unverified products; no Humanin amount or route given; exact course forgotten. Two-month post-stop feeling follows several agents and cannot establish Humanin-only duration.

Source context — Humanin — Dosage, Half-Life & Reconstitution: Editorial compound guide, not a firsthand thread or counted users. Assumes HNG without verifying prevalence or safety; later attempt to reopen lower body failed. Preparation content excluded.

Cycles people discuss

Guide courses	4–8 weeks appears in guides. A sequential-stack user recalled usual 6–8-week courses but forgot the exact Humanin course.
Competing chart patterns	4–6 or 8–12 weeks, 4–8 weeks off, seasonal restarts and continuous use all appear. None establishes a necessary break or long-term safety.
Timing preferences	Morning use, AM/PM splits and introducing it alone for 1–2 weeks before other mitochondrial agents are community preferences, not proven timing rules.

Notes

Four–eight weeks in guides; exact personal courses vary. Longeva says four–eight weeks then off; Jacked Forums also lists four–eight weeks. The sequential-stack user recalled usual six–eight-week courses but forgot the exact Humanin cycle. Jay Campbell secondhand describes KenkoHacks using 1 mg twice daily, 15 days, with unverified route/identity. Humanin: dosing in studies (preclinical) (Community guide · Accessed 2026-09-30) · SS-31 and anti aging (Personal report · Accessed 2026-09-30) · Humanin Peptide: Benefits, Dosage and Side Effects (Secondhand community claim · Accessed 2026-09-30)

Other chart patterns: four–six or eight–twelve weeks. Community charts also include four–eight weeks off, multi-month or continuous use, and seasonal/yearly restarts. None establishes a necessary break, loading phase or long-term safety. Daily and 2–5-times-weekly use coexist.

Morning and stacking are preferences, not proven timing rules. Charts favor morning or AM/PM splits; empty-stomach claims are unproven. Introducing Humanin alone for 1–2 weeks before adding other mitochondrial agents appears in community discussions, but no comparative study establishes that sequence.

Source context — Humanin: dosing in studies (preclinical): Vendor-authored table mixes preclinical extrapolation and public protocols; no audited user sample or clinical validation. Its fixed potency-to-dose relationship and equal-signal claims are not accepted. Commercial promotion present.

Source context — Humanin Peptide: Benefits, Dosage and Side Effects: Commercial/affiliate blog; author explicitly says he has not used Humanin. KenkoHacks is secondhand here; route and molecule identity not verified. Thirty-minute rationale imports mouse analog PK. Unsafe rat-to-human prescription language rejected.

Stacks

MOTS-c and SS-31	Pairing or sequencing these mitochondrial peptides is discussed. Combined results cannot show how much came from Humanin.
NAD-related and longevity stacks	NMN, NR, NAD+ and Epitalon appear in wider stacks; rare vendor-blog FOXO4-DRI combinations are much thinner lore.
GH agents or incretins	Ipamorelin/mod-GRF and GLP-1-related drugs also appear. GH-axis logic is debated, and metabolic changes cannot be credited to Humanin alone.

Notes

“Mito stack” enthusiasm does not identify the effective ingredient. Humanin is framed as a survival signal, MOTS-c as metabolic/exercise-related, and SS-31 as membrane-focused. Users discuss pairing or sequencing them, sometimes adding NMN/NR/NAD+, Epitalon, GH secretagogues or incretins. The sequential user's improved well-being is a stack experience; it cannot rank Humanin's contribution. SS-31 and anti aging (Personal report · Accessed 2026-09-30)

Core MDP pair: Humanin/HNG + MOTS-c — cytoprotective/neuro framing + metabolic/exercise-mimetic framing; one sparse forum log used multi-mg of each and credited MOTS-c more for fat-loss feel. [community]

Mito membrane + signal: HNG + SS-31 (elamipretide-class) for “ETC membrane repair + survival signaling” narrative. [community]

NAD axis: HNG with NMN, NR, or injectable NAD+ in aging-energy stacks — attribution nearly impossible. [community]

Epitalon / pineal longevity combos: Occasional multi-pathway longevity stacks; pure marketing adjacency risk. [community]

Senolytic adjacency: Rare FOXO4-DRI + HNG “clearance + protection” lore on vendor blogs — very thin evidence and high confound. [community]

GH secretagogue neighborhood: Older forum posts combine MOTS-c / humanin with ipamorelin or mod-GRF — note endogenous humanin is often inverse to GH/IGF-1 biology, so stacking logic is debated not settled. [community]

GLP-1 adjacency: Modern logs sometimes run mito peptides beside retatrutide or other incretins; metabolic outcomes cannot be credited to humanin alone. [anecdote]

Watch for

Persistent swelling report	One user described under-eye swelling after 200 mcg SubQ that persisted two months after stopping. Product identity and causation were not verified.
Preclinical cancer concern	An experimental study found Humanin promoted tumor progression and reduced chemotherapy effectiveness in mice. This does not quantify human risk.
Identity, reactions and interactions	HN/HNG confusion, contamination, mcg/mg errors, injection irritation and occasional fatigue are recorded. Glucose/GH-axis interactions and pregnancy safety remain uncharted.

Notes

Persistent swelling has been reported. One LongeCity poster described under-eye swelling the morning after 200 mcg SubQ and persistence two months after stopping. Another retrospectively wondered about similar bags. Causation and product identity remain unverified; these reports contradict a blanket “quiet” safety story. Humanin (Community discussion · Accessed 2026-09-30)

Protecting cells can be a problem in cancer. An experimental breast-cancer study found exogenous Humanin promoted tumor progression and reduced chemotherapy effectiveness in mice. This is a concrete preclinical concern, not a quantified human risk or proof that every exposure causes cancer. Humanin Promotes Tumor Progression in Experimental Triple Negative Breast Cancer (Animal context · Accessed 2026-09-30)

Unknown interactions and injection/product risks. Community reports include local redness, irritation, itch/pain and occasional fatigue. Glucose-related and GH/IGF-axis stacking concerns remain uncharted; pregnancy/lactation safety is unknown. Misidentified HN/HNG, contamination and mcg/mg errors add risks that an absence of noticeable effects cannot exclude. Pharmacokinetics and tissue distribution of humanin and its analogues in male rodents (Animal context · Accessed 2026-09-30) · Humanin Stability (Community discussion · Accessed 2026-09-30)

Full notes

What Humanin actually is

A mitochondrial survival signal. Humanin is a short peptide linked to mitochondrial DNA. Researchers study how it helps stressed cells resist programmed cell death. Biohackers call it a longevity or mitochondrial peptide; that name does not mean an injection replaces an age-related deficiency. Animal context Reddit r/Peptides
Humanin, HNG and other derivatives are different molecules. HNG, also called S14G-Humanin, changes one building block in native Humanin. HNGF6A is another analog with different clearance behavior. Forum amounts cannot move between those identities, and greater activity in a laboratory assay is not a human dose-conversion rule. LongeCity Supplements forum Animal context

Why people are interested

Aging, brain resilience and metabolic health. Discussion centers on protecting cells, maintaining cognition and supporting insulin sensitivity. These are sought benefits rather than established outcomes from injecting Humanin. Higher natural levels in children of centenarians are an association; they do not prove supplementation extends life. Reddit r/Peptides Animal context
Sleep or calm, sometimes no noticeable change. One user described uninterrupted sleep and another possible anxiety relief. A separate account noticed nothing in the short or medium term. These reports do not establish a reliable energy boost or cognitive improvement. Personal report Reddit r/Peptides Reddit r/Peptides

Doses people discuss

Reported amounts only, not a personal regimen. Molecule, route, frequency and daily versus per-use totals matter; “Humanin” on a label does not establish native HN or HNG.

Native Humanin: 500 mcg once in one account. The poster explicitly distinguished it from HNG and suspected placebo behind reduced anxiety. Route was not stated in that reply. Another HN user described 5 mg once weekly alongside 5 mg MOTS-c twice weekly. Reddit r/Peptides
Unverified “Humanin”: 2 mg every other day or combined 5 mg amounts. The first is a one-week sleep report. Another account used 5 mg Humanin plus 5 mg MOTS-c per combined administration and later described Humanin every 4–5 days; the same author's exposure history conflicts. Personal report
HNG/S14G: 0.4 mg and 1 mg SubQ in a forum experiment. A LongeCity user identified S14G and reported trying these amounts without immediate issues; frequency was unspecified. This is a firsthand amount, not a therapeutic range. LongeCity Supplements forum
Commercial table: native 1–3 mg versus HNG 100–500 mcg per injection. Longeva lists each separately at 2–3 injections weekly. Jacked Forums instead assumes HNG for 0.5–2 mg per injection, three weekly. These competing guide claims cannot establish equivalent exposure or a preferred schedule. Community guide Community guide
Other chart lore: 100–300, 500–750 mcg, or 1–2 mg total daily. Community charts give these separate SubQ/HNG-oriented bands, sometimes splitting daily amounts AM/PM. Some show 0.5 mg daily in the first week, increasing toward 1–2 mg. These are chart claims, not verified user cohorts or instructions. Community
Weekly totals differ from per-injection amounts. Other community charts give 1–5 mg total weekly split over 2–3 SubQ injections, whereas another camp gives 1–5 mg per administration 2–5 times weekly, sometimes discussing nasal use. They must stay separate. Nasal discussion is thinner; capsules are not the established community form. Community
25–50 mcg daily was copied, not validated. The stability-thread author borrowed that number and asked whether it belonged to HNG. A reply then offered a rat-derived cardiac-study conversion. Neither supplies a verified human regimen. mcg means micrograms; 1,000 mcg equals 1 mg; SubQ means beneath the skin. Reddit r/Peptides

Half-life: what the circulated numbers mean

Human elimination half-life remains unknown. Jacked Forums states that human kinetics are not established. Daily or several-times-weekly schedules in charts are habits and extrapolations; they do not measure blood clearance. Community guide Community
30 minutes and 2–4 hours are not verified human SubQ measurements. Jay Campbell's blog repeats a roughly 30-minute rationale traceable to mouse analog research. TelosRX circulates 2–4 hours for SubQ without an inspected matching human study. Rodent context is separate below; sleep persistence cannot establish half-life. Jay Campbell biohacking blog TelosRX commercial telehealth blog

Onset: when people first notice something

A single exposure or the second exposure in isolated reports. The native-Humanin anxiety impression followed one 500 mcg use, with no precise clock and acknowledged placebo uncertainty. The 2 mg every-other-day user noticed uninterrupted sleep after the second exposure within the first week. Reddit r/Peptides Personal report
No dependable onset window. Another user noticed no short- or medium-term effect. Community-chart talk of reassessing around weeks 3–4, or gradual changes around weeks 4–8, describes observation periods rather than demonstrated onset. Reddit r/Peptides Community

Duration: how long a perceived effect lasts

Hours per dose cannot be established from these reports. Sleeping eight uninterrupted hours describes that night's sleep, not eight hours of drug action. The single-exposure anxiety account gives no reliable end time. Personal report Reddit r/Peptides
Two months after stopping in one sequential stack. A user still felt well after SS-31, then MOTS-c, then Humanin. That retrospective impression cannot isolate Humanin, establish a washout period or prove continued cellular protection. Personal report

Cycles and timing habits

Four–eight weeks in guides; exact personal courses vary. Longeva says four–eight weeks then off; Jacked Forums also lists four–eight weeks. The sequential-stack user recalled usual six–eight-week courses but forgot the exact Humanin cycle. Jay Campbell secondhand describes KenkoHacks using 1 mg twice daily, 15 days, with unverified route/identity. Community guide Personal report Jay Campbell biohacking blog
Other chart patterns: four–six or eight–twelve weeks. Community charts also include four–eight weeks off, multi-month or continuous use, and seasonal/yearly restarts. None establishes a necessary break, loading phase or long-term safety. Daily and 2–5-times-weekly use coexist. Community
Morning and stacking are preferences, not proven timing rules. Charts favor morning or AM/PM splits; empty-stomach claims are unproven. Introducing Humanin alone for 1–2 weeks before adding other mitochondrial agents appears in community discussions, but no comparative study establishes that sequence. Community

What could change the decision

Persistent swelling has been reported. One LongeCity poster described under-eye swelling the morning after 200 mcg SubQ and persistence two months after stopping. Another retrospectively wondered about similar bags. Causation and product identity remain unverified; these reports contradict a blanket “quiet” safety story. LongeCity Supplements forum
Protecting cells can be a problem in cancer. An experimental breast-cancer study found exogenous Humanin promoted tumor progression and reduced chemotherapy effectiveness in mice. This is a concrete preclinical concern, not a quantified human risk or proof that every exposure causes cancer. Animal context
Unknown interactions and injection/product risks. Community reports include local redness, irritation, itch/pain and occasional fatigue. Glucose-related and GH/IGF-axis stacking concerns remain uncharted; pregnancy/lactation safety is unknown. Misidentified HN/HNG, contamination and mcg/mg errors add risks that an absence of noticeable effects cannot exclude. Community Animal context Reddit r/Peptides

Community experiences and practical disagreements

The sleep story is more complicated than a positive testimonial. The combined-dose poster initially noticed no added effect, later mentioned better sleep while also using Epitalon, and elsewhere said Humanin had never been tried. The separate one-week sleep account should not be merged with that contradictory history. Personal report
“Mito stack” enthusiasm does not identify the effective ingredient. Humanin is framed as a survival signal, MOTS-c as metabolic/exercise-related, and SS-31 as membrane-focused. Users discuss pairing or sequencing them, sometimes adding NMN/NR/NAD+, Epitalon, GH secretagogues or incretins. The sequential user's improved well-being is a stack experience; it cannot rank Humanin's contribution. Personal report Community
Stability uncertainty can shape frequency. The weekly HN user said uncertain solution stability affected scheduling. Other replies challenged copied amounts and loss of sterility. These discussions establish uncertainty and practical friction, not validated storage life, an injection recipe or evidence that weekly use is optimal. Reddit r/Peptides
Natural levels and injected effects are different questions. The experiences thread includes someone seeking preventative benefits and another non-user questioning whether higher Humanin causes longevity or reflects other biology. Not noticing a change neither proves a hidden longevity benefit nor rules out every possible biological effect. Reddit r/Peptides

Supporting research context

Rodent kinetics: about 30 minutes in mice, over four hours in rats. These figures come from male-rodent research using HNG and a different injection route. Clearance also varied by analog and binding to a blood protein, IGFBP-3. They cannot establish how long native Humanin or HNG remains in a human user. Animal context
Healthspan research is not a longevity result in people. A primary study found improved metabolic measures without lifespan extension in HNG-treated female mice. Human participants supplied observational biomarker data. Promising model results do not settle whether exogenous Humanin helps healthy aging in people. Animal context