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Acetyl Hexapeptide-1: What It Is, and What It Does in a Tanning Cream

Acetyl Hexapeptide-1: What It Is, and What It Does in a Tanning Cream - Delux Tanners
The hero ingredient

Acetyl hexapeptide-1.
The peptide that carries the message.

Every tan starts with a message. UV reaches your skin, your body sends a signal, and your pigment cells get to work. Acetyl hexapeptide-1 is a peptide built to copy that signal. It sits in every Next-Gen cream and in Lumière, and it is one of the least understood ingredients on our labels. This is what it is, how it works, what the research does and does not show, and why so few tanning creams carry it.

6amino acids in the chain. That is the "hexa"
1receptor it is built to fit, on your pigment cells
4Delux formulas carry it: three Next-Gen creams and Lumière
UVneeded, every time. It works with light
Quick answer: acetyl hexapeptide-1 is a lab-made peptide that mimics alpha-MSH, the messenger your skin releases after UV to tell pigment cells to make melanin. It fits the same receptor, so it reinforces the signal your skin is already sending during a session. In Delux it works alongside tyrosine, copper, MelanoBronze and niacinamide in the Next-Gen creams, and it is always used with UV.
1What it is2How a tan starts3The research4In Delux5Why it is rare6Mix-ups7FAQ
It is a signal, not a building block. It does not turn into melanin. It tells the cells that make melanin to start.
It works with UV. We only ever describe it with a sunbed or the sun.
Most of the research is the ingredient makers'. We tell you that plainly, below.
It is one player in a team of five. On its own it is a message with nothing to work with.

Part one

What it is

A peptide is a short chain of amino acids, the same building blocks proteins are made from, only a lot shorter. "Hexa" means six: this one is six amino acids long. "Acetyl" is a small chemical cap on one end that makes the chain more stable in a cream and better at getting into the top layer of skin. Put together, the name on the label simply describes the molecule.

What makes this particular chain interesting is what it copies. Its sequence is modelled on the working end of alpha-MSH, alpha-melanocyte stimulating hormone, the messenger your own skin releases after UV exposure. Ingredients built to copy something the body already makes are called biomimetic. The best-known commercial version is sold to formulators as Melitane. The name every version shares, and the one on our label, is acetyl hexapeptide-1.

Part two

How a tan starts, and where the peptide comes in

Tanning is a chain of steps. Knowing them makes every tanning label easier to read, because you can see which step each ingredient is there for.

Step 1: UV arrives. Your skin registers the exposure as stress.
Step 2: the message goes out. Skin cells release alpha-MSH. This is the step acetyl hexapeptide-1 copies.
Step 3: the receptor picks it up. The message docks into a receptor called MC1R on melanocytes, your pigment cells, and switches them on.
Step 4: melanin is made. An enzyme called tyrosinase, which needs copper to work, converts tyrosine into melanin.
Step 5: the colour moves up. Finished melanin is passed up into the cells above, where you can see it.

Acetyl hexapeptide-1 is built to fit MC1R, the same receptor as the body's own messenger. So during a session, it adds to the signal your skin is already sending. That is why we call it the signal in our formulas, and why it needs the rest of the chain to be worth anything.

Tyrosine is the raw material. Copper is the tool. Acetyl hexapeptide-1 is the instruction to start.

Part three

What the research shows, and whose research it is

We would rather tell you who did the work than write "clinically proven" and hope nobody asks. Most of what is known about acetyl hexapeptide-1 comes from the companies that make and sell it, and from laboratory studies rather than large trials on people.

What the ingredient makers report
That it binds MC1R, the receptor on pigment cells, and increases melanin production in their laboratory work. They also report that, through the same receptor, it reduces the release of inflammatory messengers that skin produces under stress, which matters because UV-stressed skin is inflamed skin.
Where else it has been studied
Because it switches on pigment cells, it has been looked at for greying hair, including laboratory work on human hair follicles, and a clinical trial of a cream containing it has been reported with promising results in vitiligo, a condition where skin loses its pigment. We make no claim about either for our creams. A 2024 scientific review of peptides in skin care describes it as an alpha-MSH biomimetic peptide.
What we do not claim
Some supplier material describes it as stimulating melanin even without sun. We do not make that claim on any Delux product and we will not: every Delux formula is sold to be used with a sunbed or the sun. We also do not claim it protects you from UV. A tan is your skin's response to UV damage, not a sunscreen, and you should wear one outdoors whatever cream is underneath.

The honest summary: the mechanism is well understood, the supplier data is encouraging, and there are no large independent trials of it in tanning creams. That is true of most cosmetic actives. We use it because it does a job nothing else in the formula does, and we would rather tell you exactly how strong the evidence is than dress it up.

Part four

Where it is in the Delux range

Formula Acetyl hexapeptide-1? Where it sits
Island Coconut Yes Mid list, above the fragrance, part of the five-active melanin stack
Electric Melon Yes Same formula as Island Coconut, different scent
Bubblegum Mania Yes Same formula as Island Coconut, different scent
Lumière Yes Lower on the list, supporting tyrosine and MelanoBronze
Sun Sauce No Carries tripeptide-1, a different, supporting peptide
Go Dark No A conditioning cream with no melanin stack

In the Next-Gen creams it is one of five melanin actives, each chosen for a different step: N-acetyl-L-tyrosine as the raw material, copper gluconate for the enzyme, MelanoBronze to prime the response, acetyl hexapeptide-1 to reinforce the signal, and niacinamide for moving pigment up to the surface. Most tanning creams carry one of those. More than one is rare.

Signal peptides in a typical sunbed accelerator

0
Tyrosine onlySignal peptide

A raw material and no instruction to use it.

VS

Signal peptides in a Next-Gen cream

1
Acetyl hexapeptide-1

One signalling peptide, working alongside tyrosine, copper, MelanoBronze and niacinamide, each with a job.

Part five

Why so few tanning creams carry it

The cost. Peptides are among the most expensive ingredients a cream can carry, kilo for kilo. They are usually found in face serums that cost far more than a tube of tanning cream.
It needs a proper formula. A peptide has to stay stable in the tube and reach the skin. That takes a well-built water-based cream, not an oil or a bronzer lotion.
It does not show on day one. A bronzer gives instant colour and makes an easy advert. A signalling peptide works quietly, session by session, with your own melanin.

So most brands list tyrosine, put a bronzer in, and spend the difference on marketing. We went the other way.

Part six

Easy to mix up

Acetyl hexapeptide-8
A different peptide, sometimes sold as Argireline, used in anti-ageing serums for the look of expression lines. It has nothing to do with pigment. Lumière carries both: hexapeptide-1 for the tan, hexapeptide-8 for the face.
Tripeptide-1
A three amino acid signalling peptide found at a low level in Sun Sauce. A supporting player there, and a different molecule.
MelanoBronze
Not a peptide. A monk's pepper berry extract combined with acetyl tyrosine, made by one Swiss laboratory. It primes the same pigment response from a different angle, which is why the two work well together. The full MelanoBronze story.

What acetyl hexapeptide-1 is not

It is not a self-tan and it adds no colour of its own. It is not a sunscreen. It does not work instead of UV, and it cannot change how your skin type responds to it: if you burn easily, a peptide will not change that, and short sessions and sunscreen still apply. And on its own it is a message with nothing to act on. It earns its place because the rest of the formula gives it something to work with.

One instruction, in a team of five. That is the job.

Quick answers

Frequently asked

What is acetyl hexapeptide-1?
A six amino acid peptide designed to mimic alpha-MSH, the messenger your skin releases after UV to tell pigment cells to make melanin. The best-known commercial version is sold as Melitane.
What does acetyl hexapeptide-1 do in a tanning cream?
It fits MC1R, the receptor on pigment cells, and reinforces the signal to produce melanin during UV exposure. It works best alongside a building block like tyrosine and copper for the enzyme.
Does acetyl hexapeptide-1 work without the sun?
We do not claim that on any Delux product. Every Delux formula is for use with a sunbed or the sun.
Is acetyl hexapeptide-1 the same as Argireline?
No. Argireline is acetyl hexapeptide-8, an anti-ageing peptide for the look of expression lines. Acetyl hexapeptide-1 is the pigment peptide. Lumière contains both.
Which Delux products contain acetyl hexapeptide-1?
Island Coconut, Electric Melon, Bubblegum Mania and Lumière. Sun Sauce and Go Dark do not.
Is acetyl hexapeptide-1 safe to use?
It is a widely used cosmetic ingredient in skin and hair care. As with any new product, patch test first if you have sensitive skin, and stop if you react.

The signal, in every Next-Gen tube.

Acetyl hexapeptide-1 plus four more actives, each with a job. Nothing on the label you cannot look up.

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