Saturday Skin Scalp + Hair Strengthening Peptide Treatment Versus The INKEY List Caffeine Stimulating Scalp Treatment

Saturday Skin Scalp + Hair Strengthening Peptide Treatment Versus The INKEY List Caffeine Stimulating Scalp Treatment

What's inside

Key Ingredients

Benefits

Concerns

No concerns

Ingredients Side-by-side

Water

Butylene Glycol

Niacinamide

Octyldodeceth-16

Polysorbate 20

Tromethamine

Acrylates/C10-30 Alkyl Acrylate Crosspolymer

Menthol

Sodium Benzoate

Salicylic Acid

Caffeine

Chlorella Vulgaris Extract

Glucose

Panthenol

Potassium Sorbate

Fructooligosaccharides

Fructose

Glycerin

1,2-Hexanediol

Menthyl PCA

Ethyl Menthane Carboxamide

Glycine Soja Seed Extract

Saccharomyces Cerevisiae Extract

Caprylic/Capric Triglyceride

Propylheptyl Caprylate

Hydrogenated Lecithin

Propanediol

Pentylene Glycol

Cocoglycerides

Phenyl Trimethicone

Cynanchum Atratum Extract

Ethylhexylglycerin

Octanediol

Caprylyl Glycol

Althaea Rosea Flower Extract

Dipotassium Glycyrrhizate

Serine

Glutamic Acid

Ceramide NP

Cholesterol

Stearic Acid

Aspartic Acid

Leucine

Sh-Oligopeptide-1

Sh-Polypeptide-1

Sphinganine

Phosphatidylcholine

Alanine

Lysine

Arginine

Tyrosine

Phenylalanine

Proline

Threonine

Valine

Isoleucine

Polyglyceryl-10 Laurate

Histidine

Cysteine

Methionine

Tocopherol

Acetyl Hexapeptide-8

Copper Tripeptide-1

Palmitoyl Pentapeptide-4

Tripeptide-1

Glycine Soja Oil

Alanine/Histidine/Lysine Polypeptide Copper Hcl

Hexapeptide-9

Palmitoyl Tripeptide-1

Sh-Oligopeptide-14

Sh-Oligopeptide-2

Sh-Polypeptide-45

Sh-Polypeptide-7

Sh-Polypeptide-9

Water, Butylene Glycol, Niacinamide, Octyldodeceth-16, Polysorbate 20, Tromethamine, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Menthol, Sodium Benzoate, Salicylic Acid, Caffeine, Chlorella Vulgaris Extract, Glucose, Panthenol, Potassium Sorbate, Fructooligosaccharides, Fructose, Glycerin, 1,2-Hexanediol, Menthyl PCA, Ethyl Menthane Carboxamide, Glycine Soja Seed Extract, Saccharomyces Cerevisiae Extract, Caprylic/Capric Triglyceride, Propylheptyl Caprylate, Hydrogenated Lecithin, Propanediol, Pentylene Glycol, Cocoglycerides, Phenyl Trimethicone, Cynanchum Atratum Extract, Ethylhexylglycerin, Octanediol, Caprylyl Glycol, Althaea Rosea Flower Extract, Dipotassium Glycyrrhizate, Serine, Glutamic Acid, Ceramide NP, Cholesterol, Stearic Acid, Aspartic Acid, Leucine, Sh-Oligopeptide-1, Sh-Polypeptide-1, Sphinganine, Phosphatidylcholine, Alanine, Lysine, Arginine, Tyrosine, Phenylalanine, Proline, Threonine, Valine, Isoleucine, Polyglyceryl-10 Laurate, Histidine, Cysteine, Methionine, Tocopherol, Acetyl Hexapeptide-8, Copper Tripeptide-1, Palmitoyl Pentapeptide-4, Tripeptide-1, Glycine Soja Oil, Alanine/Histidine/Lysine Polypeptide Copper Hcl, Hexapeptide-9, Palmitoyl Tripeptide-1, Sh-Oligopeptide-14, Sh-Oligopeptide-2, Sh-Polypeptide-45, Sh-Polypeptide-7, Sh-Polypeptide-9

Betaine

Phenoxyethanol

Xanthan Gum

Trisodium Ethylenediamine Disuccinate

Lactic Acid

Sodium Metabisulfite

Glycine

Larix Europaea Wood Extract

Camellia Sinensis Extract

Zinc Chloride

Water, Betaine, Caffeine, Panthenol, Phenoxyethanol, Glycerin, Xanthan Gum, Ethylhexylglycerin, Trisodium Ethylenediamine Disuccinate, Lactic Acid, Sodium Metabisulfite, Glycine, Larix Europaea Wood Extract, Camellia Sinensis Extract, Zinc Chloride

Alternatives

Ingredients Explained

These ingredients are found in both products.

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

Caffeine is a naturally occurring plant compound found in coffee beans, tea leaves, cocoa pods, and guarana.

As an antioxidant, caffeine protects your skin from free radical damage caused by UV exposure and envionrmnetal stressors.

Early research also shows that caffeine can help calm redness, soothe irritated skin, and support hair growth by stimulating microcirculation in the scalp.

You might have seen eye creams marketing caffeine as a depuffing ingredient. This is because it is a vasoconstrictor meaning it can temporarily constrict blood vessels, though clinical evidence for this specific use is still limited.

Most skincare products contain this ingredient at concentrations between 1-6%. It is able to penetrate skin easily regardless of skin type or thickness.

Just so you know, a very small number of case reports describe caffeine-induced allergy. This ingredient is generally well-tolerated, non-irritating, and non-sensitizing for the majority of people.

Ethylhexylglycerin is created from glycerin. It is a multitasker ingredient that:

The CIR Expert Panel found minimal skin absorption or sensitization of any kind in a safety assessment. Though this ingredient is considered well-tolerated, a small number of cases of allergic dermatitis have been published since 2002. Just be sure to patch test if you are unsure.

Industry-reported use ranges from 8% in rinse-off products and 2% in leave-on formulations.

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.

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!

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