PCA Skin Exlinea Pro Peptide Serum Versus PCA Skin Exlinea Peptide Smoothing Serum

PCA Skin Exlinea Pro Peptide Serum Versus PCA Skin Exlinea Peptide Smoothing Serum

This anti-aging serum is formulated around Acetyl Octapeptide-3 and Acetyl Hexapeptide-8 to soften the look of wrinkles.

This anti-aging serum is formulated around Aloe Barbadensis Leaf Juice and Gluconolactone to soften the look of wrinkles and refine skin texture.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Glycerin

Pentylene Glycol

Glyceryl Isostearate

Isostearyl Isostearate

C13-15 Alkane

Betaine

Acrylates/C10-30 Alkyl Acrylate Crosspolymer

Xanthan Gum

Methyl Gluceth-20

Oryza Sativa Starch

Polyglyceryl-3 Laurate

Sodium Levulinate

Caprylyl Glycol

Levulinic Acid

Polyglyceryl-6 Oleate

Hydrolyzed Wheat Protein

Ethylhexylglycerin

Hydrolyzed Soy Protein

Sodium Hydroxide

Tetrasodium Glutamate Diacetate

Butylene Glycol

Pectin

Hydroxyethylcellulose

Arginine

Proline

Serine

Glucose

Acetyl Octapeptide-3

Bacillus/Soybean Ferment Extract

Sodium Hyaluronate

Chondrus Crispus Extract

Acetyl Hexapeptide-8

Disodium Phosphate

Polysorbate 60

Sodium Phosphate

Water, Glycerin, Pentylene Glycol, Glyceryl Isostearate, Isostearyl Isostearate, C13-15 Alkane, Betaine, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Xanthan Gum, Methyl Gluceth-20, Oryza Sativa Starch, Polyglyceryl-3 Laurate, Sodium Levulinate, Caprylyl Glycol, Levulinic Acid, Polyglyceryl-6 Oleate, Hydrolyzed Wheat Protein, Ethylhexylglycerin, Hydrolyzed Soy Protein, Sodium Hydroxide, Tetrasodium Glutamate Diacetate, Butylene Glycol, Pectin, Hydroxyethylcellulose, Arginine, Proline, Serine, Glucose, Acetyl Octapeptide-3, Bacillus/Soybean Ferment Extract, Sodium Hyaluronate, Chondrus Crispus Extract, Acetyl Hexapeptide-8, Disodium Phosphate, Polysorbate 60, Sodium Phosphate

Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer

Aloe Barbadensis Leaf Juice

Gluconolactone

Aminomethyl Propanol

Dipotassium Glycyrrhizate

Sodium Benzoate

1,2-Hexanediol

Santalum Austrocaledonicum Wood Oil

Aniba Rosodora Wood Oil

Phenoxyethanol

Citrus Grandis Peel Oil

Citrus Nobilis Peel Oil

Tropolone

Mentha Piperita Oil

Potassium Sorbate

Phytosterols

Tocopherol

Tocotrienols

Oryza Sativa Bran Wax

Squalene

Water, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Aloe Barbadensis Leaf Juice, Gluconolactone, Aminomethyl Propanol, Dipotassium Glycyrrhizate, Sodium Benzoate, 1,2-Hexanediol, Caprylyl Glycol, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Santalum Austrocaledonicum Wood Oil, Aniba Rosodora Wood Oil, Phenoxyethanol, Sodium Hyaluronate, Citrus Grandis Peel Oil, Citrus Nobilis Peel Oil, Tropolone, Mentha Piperita Oil, Potassium Sorbate, Acetyl Hexapeptide-8, Phytosterols, Tocopherol, Tocotrienols, Oryza Sativa Bran Wax, Squalene

Alternatives

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Acetyl Hexapeptide-8 (also known as Argireline) is a synthetic hexapeptide that is often called a "topical Botox alternative".

It works by mimicking how Botox relaxes muscles; it interferes with the signaling process that tells your facial muscles to contract. This can help soften expression lines like forehead wrinkles or crow's feet over time.

The comparison to Botox does have limits because the molecule is water-loving and relatively large.

Acetyl Hexapeptide-8 has a hard time absorbing deeply enough through the skin's outer barrier to actually reach the muscles.

So whether it truly works the way Botox does at a biological level is still up for debate, but early clinical outcomes are fairly encouraging.

A 12 week human study of a multi-ingredient regimen containing this ingredient saw:

While some studies have observed improvements in wrinkle appearance, it is important to note that more consistent results are seen in multi-ingredient formulations (vs just Acetyl Hexapeptide-8 alone).

Some research studies also used higher concentrations (up to 10%) while this ingredient is usually found in concentrations up to 0.005% in leave-on formulations.

Acrylates/C10-30 Alkyl Acrylate Crosspolymer is a synthetic polymer. It is used to thicken, emulsify, and improve the texture of products.

As an emulsifier, it helps stabilize oil-in-water emulsions to give products an elegant feel when applied.

It can also form a thin protective film on skin. One study found that a formula using this polymer helped slow down how quickly other ingredients (like DEET) were absorbed through skin.

A 2024 study of over 1,300 patients confirmed that sensitization to this ingredient is rare. It is also non-mutagenic and has a clean track record.

Caprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created.

Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin.

Because it is not a free-fatty acid, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on).

Sodium Hyaluronate is the salt form of hyaluronic acid. It is a long sugar chain that is naturally found in your skin, joints, and connective tissue that maintains hydration and elasticity.

In skincare, it works as a humectant. It pulls water from the environment and deeper layers of skin and binds it to the surface.

Interestingly, the size of the molecule affects its behavior:

Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and barrier repair.

Many serums use a blend of both weights so you can get surface hydration plus longer-lasting and deeper effects.

You'll typically see concentrations between 0.1-2% for this ingredient.

Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.

So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.

You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!

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