SNAP-8 (Acetyl Octapeptide-3): Argireline's Longer Cousin

Smile, squint or frown, and a nerve tells a face muscle to move. Do that for years, and some lines start to stay.

SNAP-8 is a skin-care peptide built to turn that nerve message down a notch. It is a longer cousin of argireline, with two extra links in its chain. Scientists keep finding clever ways to test it.

What it is

A peptide is a short chain of amino acids. Think of amino acids as beads and a peptide as a short bead bracelet. New to this? Start with what a peptide is.

SNAP-8 is a bracelet of eight beads. On ingredient lists, it is called acetyl octapeptide-3. "Octa" means eight.

It comes from a company in Barcelona, Spain. Take argireline, a bracelet of six beads, and add two more beads to the end.

Both copy one end of a nerve protein called SNAP-25. Nerves need SNAP-25 to send their "move!" signal to muscles.

What it does in the body

A nerve end holds tiny bubbles. Each one is filled with a messenger chemical. To send the signal, a bubble has to open at the nerve's edge.

A few proteins make that happen. They zip up like a zipper and pull the bubble open. SNAP-25 is one of them.

SNAP-8 looks like a piece of SNAP-25, so it is built as a clever decoy. The idea is that it slips in where the real protein should go. Then the zipper closes less well. Fewer bubbles open, and the signal gets softer.

Botulinum toxin, the wrinkle shot, also goes after SNAP-25. It cuts the protein. SNAP-8 is meant to go on the skin and compete instead.

What scientists have found

In cells: In the maker's lab tests, SNAP-8 cut the release of glutamate, a nerve messenger, by 43%. A 2020 review shared this result.

In 2023, a team in Turkey and the Netherlands packed SNAP-8 into tiny carrier specks. They were built to let it out slowly. In mouse cells and human skin cells, over 90% of the cells stayed alive at every amount tested.

In animals: Studies of SNAP-8 alone in animals have not turned up in published research yet. That leaves room for exciting new work.

In people: Much of the human data comes from the company that makes SNAP-8. The 2020 review also shared numbers from its website: wrinkles down by up to 62%, and 35% on average.

Another maker test of a SNAP-8 cream lasted 28 days. Wrinkle depth fell about 7% on average, and up to 38%.

Skin patches bring fresh data. They carry tiny tips that dissolve in the top layer of skin.

In a 2024 study in Korea, 24 adults with eye wrinkles tried two patches. By one eye, they wore a patch with SNAP-8 and two other skin ingredients. By the other eye, they wore a plain patch.

After 28 days, skin by the SNAP-8 patch was smoother. No side effects were seen. The study came from the patch maker and a university team.

An earlier 12-week study placed a patch with SNAP-8 and other ingredients by the outer corners of the eyes. Fine lines fell about 26%. No one had a skin reaction. It came from two companies and a skin-testing lab.

Since these patches held other ingredients, too, the results cannot be pinned on SNAP-8 alone.