StriVectin SD Advanced ™ PLUS Intensive Moisturizer For Wrinkles & Stretch Marks Versus Medik8 Liquid Peptides

StriVectin SD Advanced ™ PLUS Intensive Moisturizer For Wrinkles & Stretch Marks Versus Medik8 Liquid Peptides

This anti-aging moisturizer is formulated around Palmitoyl Tripeptide-38 and Copper Tripeptide-1 to soften the look of wrinkles and refine skin texture.

This anti-aging serum is formulated around Carnosine and Palmitoyl Tripeptide-5 to soften the look of wrinkles and refine skin texture.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Glycerin

Pentaerythrityl Tetraisostearate

Trimethylolpropane Tricaprylate/Tricaprate

Neopentyl Glycol Diheptanoate

Propanediol

Myristyl Nicotinate

Cetearyl Alcohol

Butylene Glycol

Bis-Stearyl Dimethicone

Glyceryl Stearate

Theobroma Grandiflorum Seed Butter

Dimethicone

Sorbitan Stearate

Stearoxymethicone/Dimethicone Copolymer

1,2-Hexanediol

Palmitoyl Tripeptide-38

Oryza Sativa Bran Extract

Palmitoyl Tetrapeptide-7

Astrocaryum Murumuru Seed Butter

Palmitoyl Tripeptide-1

Copper Tripeptide-1

Saccharide Isomerate

Panthenol

Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer

PEG-40 Stearate

Astrocaryum Vulgare Kernel Oil

Polysilicone-11

Butyrospermum Parkii Butter

Ceteareth-20

Bisabolol

Caprylhydroxamic Acid

Nicotiana Benthamiana Hexapeptide-40 Sh-Oligopeptide-1

Phaseolus Lunatus Seed Extract

Aloe Barbadensis Leaf Juice

Bacillus/Sea Salt Ferment Filtrate

Zingiber Officinale Root Extract

Rosmarinus Officinalis Leaf Extract

Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate

Pentaclethra Macroloba Seed Oil/Behenic Acid/Aminopropanediol Amides/Esters

Helianthus Annuus Extract

Hydrolyzed Hyaluronic Acid

Evodia Rutaecarpa Fruit Extract

Sodium Hyaluronate Crosspolymer

Nymphaea Alba Flower Extract

Methylglucoside Phosphate

Cetyl Hydroxyethylcellulose

Adenosine

Isohexadecane

Sorbitan Isostearate

Hydroxypropyl Cyclodextrin

Copper Lysinate/Prolinate

Aminomethyl Propanol

Dicaprylyl Ether

Dipotassium Phosphate

Ethylhexyl Stearate

Sodium Isostearate

Polysorbate 60

Resveratrol

Xanthan Gum

Disodium EDTA

Parfum

Lactic Acid

Mica

Rutin

Tocopherol

Sodium Citrate

Citric Acid

CI 77891

CI 77491

Water, Glycerin, Pentaerythrityl Tetraisostearate, Trimethylolpropane Tricaprylate/Tricaprate, Neopentyl Glycol Diheptanoate, Propanediol, Myristyl Nicotinate, Cetearyl Alcohol, Butylene Glycol, Bis-Stearyl Dimethicone, Glyceryl Stearate, Theobroma Grandiflorum Seed Butter, Dimethicone, Sorbitan Stearate, Stearoxymethicone/Dimethicone Copolymer, 1,2-Hexanediol, Palmitoyl Tripeptide-38, Oryza Sativa Bran Extract, Palmitoyl Tetrapeptide-7, Astrocaryum Murumuru Seed Butter, Palmitoyl Tripeptide-1, Copper Tripeptide-1, Saccharide Isomerate, Panthenol, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, PEG-40 Stearate, Astrocaryum Vulgare Kernel Oil, Polysilicone-11, Butyrospermum Parkii Butter, Ceteareth-20, Bisabolol, Caprylhydroxamic Acid, Nicotiana Benthamiana Hexapeptide-40 Sh-Oligopeptide-1, Phaseolus Lunatus Seed Extract, Aloe Barbadensis Leaf Juice, Bacillus/Sea Salt Ferment Filtrate, Zingiber Officinale Root Extract, Rosmarinus Officinalis Leaf Extract, Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate, Pentaclethra Macroloba Seed Oil/Behenic Acid/Aminopropanediol Amides/Esters, Helianthus Annuus Extract, Hydrolyzed Hyaluronic Acid, Evodia Rutaecarpa Fruit Extract, Sodium Hyaluronate Crosspolymer, Nymphaea Alba Flower Extract, Methylglucoside Phosphate, Cetyl Hydroxyethylcellulose, Adenosine, Isohexadecane, Sorbitan Isostearate, Hydroxypropyl Cyclodextrin, Copper Lysinate/Prolinate, Aminomethyl Propanol, Dicaprylyl Ether, Dipotassium Phosphate, Ethylhexyl Stearate, Sodium Isostearate, Polysorbate 60, Resveratrol, Xanthan Gum, Disodium EDTA, Parfum, Lactic Acid, Mica, Rutin, Tocopherol, Sodium Citrate, Citric Acid, CI 77891, CI 77491

Inulin

Sodium Hyaluronate

Alpha-Glucan Oligosaccharide

Carnosine

Carbomer

Polysorbate 20

Caprylyl Glycol

Phenoxyethanol

Dunaliella Salina Extract

Ethylhexylglycerin

Palmitoyl Tripeptide-5

Sodium Benzoate

Acetyl Hexapeptide-8

Tetrapeptide-21

Pentapeptide-18

Pantolactone

Glyceryl Caprylate

Lactic Acid/Glycolic Acid Copolymer

Polyvinyl Alcohol

Phenylpropanol

Copper Palmitoyl Heptapeptide-14

Heptapeptide-15 Palmitate

Potassium Sorbate

Water, Glycerin, Butylene Glycol, Inulin, Sodium Hyaluronate, Panthenol, Alpha-Glucan Oligosaccharide, Carnosine, Carbomer, Polysorbate 20, Caprylyl Glycol, Phenoxyethanol, Hydroxypropyl Cyclodextrin, Dunaliella Salina Extract, Ethylhexylglycerin, Citric Acid, Palmitoyl Tripeptide-5, Sodium Benzoate, Acetyl Hexapeptide-8, Tetrapeptide-21, Pentapeptide-18, Palmitoyl Tripeptide-1, Pantolactone, Palmitoyl Tripeptide-38, Palmitoyl Tetrapeptide-7, Glyceryl Caprylate, Lactic Acid/Glycolic Acid Copolymer, Polyvinyl Alcohol, Phenylpropanol, Copper Palmitoyl Heptapeptide-14, Heptapeptide-15 Palmitate, Potassium Sorbate, Xanthan Gum

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Alternatives

Ingredients Explained

These ingredients are found in both products.

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

Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:

Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.

Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness.

Citric Acid is an alpha hydroxy acid (AHA) naturally found in citrus fruits like oranges, lemons, and limes.

Like other AHAs, citric acid can exfoliate skin by breaking down the bonds that hold dead skin cells together. This helps reveal smoother and brighter skin underneath.

However, this exfoliating effect only happens at high concentrations (20%) which can be hard to find in cosmetic products.

Due to this, citric acid is usually included in small amounts as a pH adjuster. This helps keep products slightly more acidic and compatible with skin's natural pH.

In skincare formulas, citric acid can:

While it can provide some skin benefits, research shows lactic acid and glycolic acid are generally more effective and less irritating exfoliants.

Most citric acid used in skincare today is made by fermenting sugars (usually from molasses). This synthetic version is identical to the natural citrus form but easier to stabilize and use in formulations.

Rosacea skin has a lower threshold for acids generally, with 62.5% of rosacea subjects in one study reacting to lactic acid in a sting test. This is why we mark citric acid as a potential rosacea trigger.

However, this ingredient shows up as a pH adjuster or chelator at roughly 0.1-1% in many products. These low levels are unlikely to be an issue for rosacea skin and becomes a potential trigger at exfoliating concentrations (20%). Because everybody's skin is unique, we recommend a patch test if you are unsure.

Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.

Topically, glycerin does several things at once:

Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.

Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.

This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.

Just know very high concentrations (>40%) can feel tacky in low humidity.

Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.

This ingredient is used in skincare as a delivery system.

It works by "encapsulating" active ingredients with its unique ring shape that is water-loving on the outside and oil-loving on the inside. This improves the stability and absorption of the product into the skin.

According to a manufacturer, it also offer some moisturizing effects.

Palmitoyl Tetrapeptide-7 (formerly Palmitoyl Tetrapeptide-3) is a synthetic peptide. Its main job is to fight what researchers call "inflammaging".

"Inflammaging" is the slow, low-grade chronic inflammation that quietly breaks down collagen as we age.

This ingredient calms down a specific inflammation signal in your skin cells (called IL-6). When left unchecked, this signal triggers enzymes that break down collagen and elastin.

Clinical testing showed statistically significant improvements in:

Studies also found the more of this ingredient used, the more your skin produces Collagen I, fibronectin, and hyaluronic acid.

You'll likely see this ingredient paired with Palmitoyl Tripeptide-1 in the well-known Matrixyl 3000 complex for enhanced anti-aging effects.

A 3% concentration applied twice daily for two months showed meaningful skin rejuvenation results in clinical panels.

Fungal acne note: Usually a palmitic acid component can feed Malassezia in unbound form, but here is is covalently bonded to the peptide. This means it is very difficult for Malassezia to access, and therefore very unlikely to cause fungal acne.

Palmitoyl Tripeptide-1 (aka Pal-GHK) is a synthetic signal peptide made of three amino acids attached to palmitic acid.

That fatty acid attachment is the key: it boosts the peptide's ability to penetrate the skin barrier. This puts it closer to the dermal cells where it can actually make a difference.

Once there, it acts as a matrikine, a signaling peptide that prompts fibroblasts to produce more collagen, fibronectin, and hyaluronic acid.

In vitro studies show it can boost collagen production in skin cells even when UV-damaged skin samples were treated with it at a tiny concentration (it almost fully restored dermal collagen at 5ppm). It achieved this at 100x lower concentration than retinoic acid, which needed 500 ppm to do the same thing.

Human clinical data is promising, but modest:

A study of 23 female volunteers found a small but statistically significant increase (~4%) in skin thickness after treatment at 4 ppm.

A separate small trial of 15 women showed statistically significant reductions in wrinkle length, depth, and skin roughness after applying it twice daily for four weeks.

You'll likely see Pal-GHK paired with Palmitoyl Tetrapeptide-7 as part of the Matrixyl 3000 complex.

This synthetic, signal peptide has unique skin conditioning properties in that is a matrikine-mimetic compound.

First of all, Palmitoyl Tripeptide-38 is a signal peptide; signal peptides tell the body to create more collagen.

What is a matrikine-mimetic compound?

This peptide has the ability to mimic matrikines in skin. Our skin created matrikines by breaking down matrix proteins into peptides.

Matrikines play a role in:

Though further research is needed, this ingredient seems pretty promising. In one study, women over the age of 40 with visible photoaging used a vitamin C serum with this ingredient for 56 days (15% ascorbid acid, 5 ppm palmitoyl tripeptide‐38). The results found improvement in skin roughness and skin tone.

This peptide is also part of the famous Matrixyl synthe’6, a blend of ingredients that also includes glycerin, water, and hydroxypropyl cyclodextrin.

Panthenol is a common ingredient that helps hydrate and soothe the skin. It is found naturally in our skin and hair.

There are two forms of panthenol: D and L.

D-panthenol is also known as dexpanthenol. Most cosmetics use dexpanthenol or a mixture of D and L-panthenol.

Panthenol is famous due to its ability to go deeper into the skin's layers. Using this ingredient has numerous pros (and no cons):

Like hyaluronic acid, panthenol is a humectant. Humectants are able to bind and hold large amounts of water to keep skin hydrated.

This ingredient works well for wound healing. It works by increasing tissue in the wound and helps close open wounds.

Once oxidized, panthenol converts to pantothenic acid. Panthothenic acid is found in all living cells.

This ingredient is also referred to as pro-vitamin B5.

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!

Xanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.

On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.

Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.

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