What is SNAP-8? Acetyl octapeptide-3 explained

SNAP-8™ has become a popular cosmetic peptide for the look of expression lines, the lines that show when you frown, squint or smile. This guide explains what SNAP-8 is, how it compares with Argireline™, what the evidence does and doesn't show, and how to use it alongside copper peptides. Biolabs Cosmetics makes topical cosmetic products only, so this is all about how skin looks and feels.

In short: SNAP-8 is the trade name for acetyl octapeptide-3, a synthetic peptide made of eight amino acids. It's used in creams and serums to help soften the look of expression lines around the forehead and eyes. It's a cosmetic ingredient, not an injectable.

What is SNAP-8?

SNAP-8's ingredient (INCI) name is acetyl octapeptide-3. “Octapeptide” means a chain of eight amino acids. “Acetyl” refers to a small chemical group attached to one end of the chain. SNAP-8 is the trade name used by the Spanish ingredient maker Lipotec (Errante et al., 2020; Ji et al., 2020).

The European ingredient database COSMILE lists acetyl octapeptide-3 as synthetic, with two functions: humectant (it helps hold moisture) and skin conditioning (it helps keep skin in good condition) (COSMILE Europe: Acetyl Octapeptide-3).

In our formulas, SNAP-8 is there to help soften the look of expression lines, especially across the forehead and around the eyes.

SNAP-8 vs Argireline

SNAP-8 is a longer version of an older peptide, Argireline. Argireline's INCI name is acetyl hexapeptide-8 (you may also see acetyl hexapeptide-3). It's a chain of six amino acids. SNAP-8 adds two more to the same chain (Ji et al., 2020; Errante et al., 2020). Argireline's sequence was modelled on a short section of a natural protein called SNAP-25 (Blanes-Mira et al., 2002; Errante et al., 2020).

SNAP-8 Argireline
INCI name Acetyl octapeptide-3 Acetyl hexapeptide-8 (also seen as acetyl hexapeptide-3)
Length 8 amino acids 6 amino acids
Published research Mainly supplier data. We couldn't find an independent published study of SNAP-8 on its own. More published work, including a small 2002 study, a skin-penetration study and recent reviews
Where you'll find it at Biolabs 1% GHK-Cu + SNAP-8 Serum, Renewal Cream Not used in our range

What the evidence says, honestly

  • Argireline: in the 2002 study that introduced Argireline, healthy women used a cream containing 10% of the peptide for 30 days, and the researchers reported that measured line depth went down (Blanes-Mira et al., 2002). That's a high concentration in one small study.
  • Getting into the skin is the big question. A US FDA lab study applied a 10% Argireline cream to human skin samples for 24 hours. Most of it was washed off the surface. About 0.22% of the applied amount was found in the outermost layer of skin, about 0.01% in the layer below, and none was detected deeper (Kraeling et al., 2015). A 2025 review agrees that the peptide passes into skin poorly, and says it's still uncertain how it acts when applied to skin (Zdrada-Nowak et al., 2025).
  • SNAP-8: a 2020 scientific review notes that the line-reduction figures quoted for SNAP-8 come from the manufacturer's own data (Errante et al., 2020). We haven't found independent published studies of SNAP-8 on its own, so we don't quote those figures.

Our view: SNAP-8 and Argireline are popular cosmetic peptides with an interesting lab background and limited independent human data. Pick a product for the whole formula, and judge it by how your skin looks and feels over several weeks.

What to expect from a SNAP-8 product

Used consistently, a SNAP-8 serum or cream is designed to:

  • Help soften the look of expression lines on the forehead, around the eyes and around the mouth
  • Leave skin looking smoother and feeling hydrated, helped by the hyaluronic acid and glycerine in our serum
  • Fit into a gentle daily routine without fuss

What it won't do: replace sunscreen or behave like a professional injectable. Expression lines also show more when skin is dry, so good hydration and daily SPF matter just as much.

Using SNAP-8 with GHK-Cu

We pair SNAP-8 with the copper peptide GHK-Cu, so one product covers two jobs. GHK-Cu helps skin look smoother and firmer, and SNAP-8 focuses on the look of expression lines. You'll find them together in:

Compare the SNAP-8 serum with our other serums in the copper peptide serums collection.

New to copper peptides? Start with our guide to what GHK-Cu is.

How to apply SNAP-8

  1. Patch test on a small area of skin before using it on your face.
  2. Serum (evening): apply 2–3 drops of the SNAP-8 serum to clean, dry skin once daily, preferably at night. Massage into the face and neck, including the forehead and the areas around the eyes, while keeping it out of the eyes themselves.
  3. Cream: apply a small amount of the Renewal Cream once or twice daily. At night, use it over the serum. It contains GHK-Cu, so use it morning or night, just leave vitamin C out of the routine you use it in.
  4. Morning: finish with a broad-spectrum sunscreen.

Avoid broken skin and stop if irritation occurs. For routine order and pairing with other actives, see how to use copper peptides.

Frequently asked questions

Is SNAP-8 like Botox?

No. SNAP-8 is a topical cosmetic peptide that helps soften the look of expression lines. It isn't an injectable or a medicine.

Is SNAP-8 better than Argireline?

There's no good independent evidence that settles it. SNAP-8 is a longer version of the Argireline peptide, but most of the comparison data comes from the ingredient supplier. Choose a product for its whole formula and how it suits your skin, not for one ingredient's name.

Can I use SNAP-8 every day?

Yes, as directed. The 1% GHK-Cu + SNAP-8 Serum is designed for once-daily use, preferably at night. The Renewal Cream can be used once or twice daily, with sunscreen during the day. Use it morning or night, just leave vitamin C out of the routine you use it in. Patch test before use and stop if irritation occurs.

Can I use SNAP-8 with retinol or vitamin C?

Don't layer them with vitamin C. Our SNAP-8 products also contain GHK-Cu, so use them morning or night, just leave vitamin C out of the routine you use them in. Use retinol or exfoliating acids on the nights you skip your SNAP-8 serum. See how to use copper peptides.

Is the SNAP-8 Renewal Cream fragrance-free?

No. The Renewal Cream contains a light “Ocean” fragrance (listed as Parfum). If you prefer no added fragrance, pair the SNAP-8 serum with the Fragrance-Free Face Cream instead.

Which Biolabs products contain SNAP-8?

The 1% GHK-Cu + SNAP-8 Peptide Face Serum, the GHK-Cu + SNAP-8 Renewal Face Cream and the Serum & Cream Duo, which includes the Renewal Cream.

Further reading

Sources

  1. Errante F, Ledwoń P, Latajka R, Rovero P, Papini AM (2020). Frontiers in Chemistry, 8:572923. doi:10.3389/fchem.2020.572923. https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2020.572923/full
  2. Ji M, Lee H-S, Kim Y, Seo C, et al. (2020). Journal of Analytical Science and Technology, 11:34. doi:10.1186/s40543-020-00232-8. https://link.springer.com/article/10.1186/s40543-020-00232-8
  3. Cosmetics Europe (COSMILE Europe ingredient database) (accessed 2026). COSMILE Europe INCI database (online). https://cosmileeurope.eu/inci/detail/18108/acetyl-octapeptide-3/
  4. Blanes-Mira C, Clemente J, Jodas G, Gil A, Fernández-Ballester G, Ponsati B, Gutierrez L, Pérez-Payá E, Ferrer-Montiel A (2002). International Journal of Cosmetic Science, 24(5):303-310. doi:10.1046/j.1467-2494.2002.00153.x. https://doi.org/10.1046/j.1467-2494.2002.00153.x
  5. Kraeling MEK, Zhou W, Wang P, Ogunsola OA (2015). Cutaneous and Ocular Toxicology, 34(1):46-52. doi:10.3109/15569527.2014.894521. https://pubmed.ncbi.nlm.nih.gov/24754410/
  6. Zdrada-Nowak J, Surgiel-Gemza A, Szatkowska M (2025). International Journal of Molecular Sciences, 26(12):5722. doi:10.3390/ijms26125722. https://pmc.ncbi.nlm.nih.gov/articles/PMC12193160/