rhode Peptide Glazing Fluid Versus The INKEY List Collagen Peptide Serum

rhode Peptide Glazing Fluid Versus The INKEY List Collagen Peptide Serum

This barrier-repair serum is formulated around Sclerocarya Birrea Seed Oil and Niacinamide to strengthen the skin barrier and soften the look of wrinkles.

This anti-aging serum is formulated around Palmitoyl Tetrapeptide-7 to soften the look of wrinkles and refine skin texture.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Butylene Glycol

Glycerin

Sclerocarya Birrea Seed Oil

Niacinamide

Tetradecane

Capryloyl Glycerin/Sebacic Acid Copolymer

Diheptyl Succinate

Benzyl Alcohol

Glyceryl Oleate

Sucrose Palmitate

Hydroxyacetophenone

Carbomer

Acrylates/C10-30 Alkyl Acrylate Crosspolymer

Caprylyl Glycol

Sodium Hydroxide

Disodium Phosphate

Sodium Phosphate

Sodium Hyaluronate

Dilauryl Thiodipropionate

Acetyl Hexapeptide-8

Water, Butylene Glycol, Glycerin, Sclerocarya Birrea Seed Oil, Niacinamide, Tetradecane, Capryloyl Glycerin/Sebacic Acid Copolymer, Diheptyl Succinate, Benzyl Alcohol, Glyceryl Oleate, Sucrose Palmitate, Hydroxyacetophenone, Carbomer, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Caprylyl Glycol, Sodium Hydroxide, Disodium Phosphate, Sodium Phosphate, Sodium Hyaluronate, Dilauryl Thiodipropionate, Acetyl Hexapeptide-8

Propanediol

Phenoxyethanol

Hydroxyethylcellulose

Sodium Phytate

Citric Acid

Leuconostoc/Radish Root Ferment Filtrate

Hyaluronic Acid

Sodium Lactate

Palmitoyl Dipeptide-5 Diaminobutyroyl Hydroxythreonine

Palmitoyl Dipeptide-5 Diaminohydroxybutyrate

Polysorbate 20

Polysorbate 60

Palmitoyl Tetrapeptide-7

Palmitoyl Tripeptide-1

Water, Glycerin, Butylene Glycol, Propanediol, Phenoxyethanol, Hydroxyethylcellulose, Sodium Phytate, Citric Acid, Leuconostoc/Radish Root Ferment Filtrate, Carbomer, Hyaluronic Acid, Sodium Lactate, Palmitoyl Dipeptide-5 Diaminobutyroyl Hydroxythreonine, Palmitoyl Dipeptide-5 Diaminohydroxybutyrate, Polysorbate 20, Polysorbate 60, Disodium Phosphate, Sodium Phosphate, Palmitoyl Tetrapeptide-7, Palmitoyl Tripeptide-1

Reviews

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.

Carbomer is a synthetic thickening and gelling agent. It's basically the ingredient that gives a lot of serums, gels, creams, and sunscreens their smooth, non-sticky texture.

Although legally permitted at very high levels, carbomers are normally used at concentrations below 1%.

It also needs to be neutralized to actually thicken, and because it is a large molecule, it doesn't really penetrate the skin barrier.

Allergy-wise, the risk is very low. Clinical studies show carbomers have low potential for skin irritation/sensitization even at concentrations up to 100%.

A 2024 UK study patch-tested 1,302 patients and found true allergy to the parent group of carbomer to be rare with no confirmed relevant reactions.

Disodium Phosphate is a water-soluble powder used as a pH adjuster and mild chelating agent. It basically holds a specific pH and binds stray metal ions so your product stays stable.

This ingredient is usually used at very low levels and concentrations range from 0.000054% - 2.9%. The CIR Expert Panel states this ingredient to be non-irritating at current use levels.

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.

Sodium Phosphate is is behind-the-scenes formulation helper. Its main job is buffering, or locking in the product's pH.

This helps ensure the formula stays at its intended acidity through manufacturing, shipping, and sitting on your shelf. Many active ingredients like vitamin C or retinoids are pH sensitive so maintaining their happy pH range matters.

It is synthetic and reported use concentrations are very low (up to 0.086% in face powders).

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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