The INKEY List Peptide Volumizing Hair Treatment Versus Sephora Collection Strengthening Hair Serum with Biotin and Phytoprotiens

The INKEY List Peptide Volumizing Hair Treatment Versus Sephora Collection Strengthening Hair Serum with Biotin and Phytoprotiens

What's inside

Key Ingredients

No key ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Pisum Sativum Peptide

Betaine

Glycerin

Panthenol

PEG-40 Hydrogenated Castor Oil

Phenoxyethanol

Polyquaternium-37

Citronellyl Methylcrotonate

Ethylhexylglycerin

Ceratonia Siliqua Seed Extract

Hydrolyzed Soy Protein

Zea Mays Starch

Leuconostoc/Radish Root Ferment Filtrate

Trisodium Ethylenediamine Disuccinate

Polyquaternium-16

Potassium Sorbate

Sodium Benzoate

Guar Hydroxypropyltrimonium Chloride

Polyquaternium-7

Water, Pisum Sativum Peptide, Betaine, Glycerin, Panthenol, PEG-40 Hydrogenated Castor Oil, Phenoxyethanol, Polyquaternium-37, Citronellyl Methylcrotonate, Ethylhexylglycerin, Ceratonia Siliqua Seed Extract, Hydrolyzed Soy Protein, Zea Mays Starch, Leuconostoc/Radish Root Ferment Filtrate, Trisodium Ethylenediamine Disuccinate, Polyquaternium-16, Potassium Sorbate, Sodium Benzoate, Guar Hydroxypropyltrimonium Chloride, Polyquaternium-7

Propanediol

Pentylene Glycol

Hydrolyzed Vegetable Protein

Sodium Polyacrylate Starch

Caprylyl/Capryl Glucoside

Citric Acid

Acacia Senegal Gum

Arginine

Xanthan Gum

Parfum

Biotin

Limonene

Citral

Water, Propanediol, Pentylene Glycol, Glycerin, Hydrolyzed Vegetable Protein, Sodium Polyacrylate Starch, Caprylyl/Capryl Glucoside, Sodium Benzoate, Potassium Sorbate, Citric Acid, Acacia Senegal Gum, Arginine, Xanthan Gum, Parfum, Biotin, Limonene, Citral

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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.

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.

Potassium Sorbate is a preservative used to prevent yeast and mold in products. It is commonly found in both cosmetic and food products.

This ingredient comes from potassium salt derived from sorbic acid. Sorbic acid is a natural antibiotic and effective against fungus.

Both potassium sorbate and sorbic acid can be found in baked goods, cheeses, dried meats, dried fruit, ice cream, pickles, wine, yogurt, and more.

You'll often find this ingredient used with other preservatives.

Sodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.

Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed.

Sodium benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase.

It is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods.

Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps.

We always recommend speaking with a professional, such as a dermatologist, if you have any concerns.

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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