Humanin

Humanin is a small peptide made of 24 amino acids. What makes it special is where its blueprint lives. It is coded by your mitochondria. Mitochondria are the tiny power plants inside your cells.

It was discovered in 2001 in the brains of Alzheimer's patients who somehow kept their thinking sharp. That clue made scientists wonder if humanin protects brain cells.

Your body makes it naturally, and the amount drops as you age. People who live very long tend to have higher levels.

It is sold "for research only" (RUO). It is not FDA-approved. The injected version is purely a research chemical right now.

People who try injected humanin are usually chasing two ideas.

• Brain protection. The story started in Alzheimer's research, so some people use it hoping to protect aging brains.
• Longevity and metabolism. It is often run alongside another mitochondrial peptide called MOTS-c, by people interested in living longer and healthier.

Be clear though: these are hopes based on animal data, not proven human uses.

In people, we do not know. The honest answer is that the human proof is missing.

There are zero human trials of injected humanin. None. What we have is strong animal data (about 80+ studies) where it protects brain cells and beta cells (the cells that make insulin). We also know natural humanin levels track with living longer.

But "your own body's humanin is linked to long life" is not the same as "injecting it helps you." Nobody has run that trial. Anyone selling it as proven therapy is overstating the data.

There is no proven dose, because there are no human trials. So this is a community guess, not a real protocol.

The community range is about 1–2 mg a day under the skin, for 8 to 12 weeks. That comes from animal studies, not human ones.

If someone runs it, the only sane version is to fix the end date before the first shot and measure one thing across it (energy, sleep, fasting blood sugar) so the window actually tells you something. The dosing is a guess layered on a guess.

The serious stuff

• Cancer history is the key skip. Humanin blocks apoptosis. Apoptosis is the body's way of killing off damaged or pre-cancer cells. A molecule that blocks that could, in theory, protect tumor cells too. There is no human data either way. But with a personal or family cancer history, the mechanism alone is reason to walk away.
• It can lower blood sugar. It boosts insulin and insulin sensitivity. If you take insulin or any blood-sugar drug, this could stack up and drop your sugar too low. Do not combine without your hormone doctor.
• There is no long-term human safety data at all.

This is an unstudied research chemical, so a clean baseline with your own doctor matters more here, not less.

Humanin really only comes one way for people.

• Brand: none. No company is developing it as a drug.
• Compounded: rare. A few pharmacies make it, about $200–$400 a month. Clinical legitimacy is weak with no human trials.
• Research-only (RUO): the entire market, and it is thin. About $80–$200 a month.
• Gray-market: little to none, since the research-only status keeps most vendors from stocking it.

Two red flags. First, there are different versions sold under one name. Native humanin is mild. A version called HNG (or S14G) is about 1,000 times stronger in lab tests. Vendors swap labels. If your bottle just says "humanin," assume it is the mild native kind. Second, this longer peptide is hard to make, so purity often falls below 95% from cheap sellers.