Peptide Skincare & BeautySkin science and ingredient guides

Skin science article

Cien Q10 Intense Eye Contour Cream Versus The INKEY List Caffeine Eye Cream

Cien Q10 Intense Eye Contour Cream Versus The INKEY List Caffeine Eye Cream This anti-aging eye moisturizer is formulated around Persea Gratissima Oil and Caffeine to soften the look of wrinkles and hydrate skin. This anti-aging eye moisturizer is formulated a

Cien Q10 Intense Eye Contour Cream Versus The INKEY List Caffeine Eye Cream

This anti-aging eye moisturizer is formulated around Persea Gratissima Oil and Caffeine to soften the look of wrinkles and hydrate skin.

This anti-aging eye moisturizer is formulated around Caffeine and Palmitoyl Tetrapeptide-7 to soften the look of wrinkles.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Glycerin

Persea Gratissima Oil

Cetearyl Isononanoate

Cetearyl Alcohol

Caprylic/Capric Triglyceride

Ricinus Communis Seed Oil

Butylene Glycol

Potassium Cetyl Phosphate

Myristyl Myristate

Theobroma Cacao Seed Butter

Hamamelis Virginiana Water

Phenoxyethanol

Xanthan Gum

Caprylyl Glycol

Panthenol

Palmitic Acid

Stearic Acid

Tocopheryl Acetate

Alcohol

Beeswax

Ethylhexylglycerin

Allantoin

Caffeine

Panicum Miliaceum Extract

Sodium Hyaluronate

Sodium Hydroxide

Ubiquinone

Taurine

Tannic Acid

Potassium Sorbate

Acanthopanax Senticosus Root Extract

Chlorella Vulgaris/Lupinus Albus Protein Ferment

Sodium Benzoate

Water, Glycerin, Persea Gratissima Oil, Cetearyl Isononanoate, Cetearyl Alcohol, Caprylic/Capric Triglyceride, Ricinus Communis Seed Oil, Butylene Glycol, Potassium Cetyl Phosphate, Myristyl Myristate, Theobroma Cacao Seed Butter, Hamamelis Virginiana Water, Phenoxyethanol, Xanthan Gum, Caprylyl Glycol, Panthenol, Palmitic Acid, Stearic Acid, Tocopheryl Acetate, Alcohol, Beeswax, Ethylhexylglycerin, Allantoin, Caffeine, Panicum Miliaceum Extract, Sodium Hyaluronate, Sodium Hydroxide, Ubiquinone, Taurine, Tannic Acid, Potassium Sorbate, Acanthopanax Senticosus Root Extract, Chlorella Vulgaris/Lupinus Albus Protein Ferment, Sodium Benzoate

Dicaprylyl Carbonate

Propanediol

Polyglyceryl-6 Distearate

Cetyl Alcohol

Glyceryl Behenate

Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer

Jojoba Esters

Albizia Julibrissin Bark Extract

Squalane

Polyglyceryl-3 Beeswax

Phospholipids

Glycine Soja Oil

Polysorbate 60

Sodium Phytate

Glycolipids

Sorbitan Isostearate

Citric Acid

Glycine Soja Sterols

Leuconostoc/Radish Root Ferment Filtrate

Hyaluronic Acid

Tocopherol

Carbomer

Darutoside

Sodium Lactate

Polysorbate 20

Palmitoyl Tetrapeptide-7

Palmitoyl Tripeptide-1

Water, Glycerin, Dicaprylyl Carbonate, Propanediol, Polyglyceryl-6 Distearate, Cetyl Alcohol, Glyceryl Behenate, Phenoxyethanol, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Jojoba Esters, Albizia Julibrissin Bark Extract, Squalane, Caffeine, Polyglyceryl-3 Beeswax, Phospholipids, Ethylhexylglycerin, Xanthan Gum, Glycine Soja Oil, Polysorbate 60, Sodium Phytate, Glycolipids, Sorbitan Isostearate, Butylene Glycol, Citric Acid, Glycine Soja Sterols, Leuconostoc/Radish Root Ferment Filtrate, Hyaluronic Acid, Sodium Benzoate, Tocopherol, Carbomer, Darutoside, Sodium Lactate, Polysorbate 20, Palmitoyl Tetrapeptide-7, Palmitoyl Tripeptide-1

Reviews

Be the first to review

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.

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.

Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!).

It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome.

On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive.

Another perk of this ingredient is that it stays functional across a wide pH range (3-10).

You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own.

Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU.

Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages.

Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon.

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!

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.

Similar Comparisons

The reference edit

Ingredients, questions
& further reading.

Connected source records selected through this article’s public topic index.

01

Formula cabinet

Ingredients & structured notes

Ingredient index

Ingredients Side-by-side

  1. 01Water
  2. 02Helianthus Annuus Seed Oil
  3. 03Simmondsia Chinensis Seed Oil
  4. 04Prunus Armeniaca Kernel Oil
  5. 05Squalane
  6. 06Alcohol Denat.
  7. 07Cetearyl Alcohol
  8. 08Glyceryl Stearate
  9. 09Stearyl Alcohol
  10. 10Cetearyl Glucoside
  11. 11Oenothera Biennis Oil
  12. 12Butyrospermum Parkii Butter
  13. 13Phenoxyethanol
  14. 14Lithium Magnesium Sodium Silicate
  15. 15Chlorphenesin
  16. 16Xanthan Gum
  17. 17Ruscus Aculeatus Root Extract
  18. 18Aloe Barbadensis Leaf Juice Powder
  19. 19Tocopherol
  20. 20Lavandula Angustifolia Oil
Source · skinsort.com
02

Product index

Related product references

03

Comparison edit

Read side by side