The [pH]ix Caffeine Eye Cream Versus CeraVe Skin Renewing Vitamin C Eye Cream

The [pH]ix Caffeine Eye Cream Versus CeraVe Skin Renewing Vitamin C Eye Cream

This calming eye moisturizer is formulated around Aloe Barbadensis Leaf Juice and Bisabolol to calm redness and hydrate skin.

This anti-aging eye moisturizer is formulated around Ascorbic Acid and Ceramide NP to soften the look of wrinkles and brighten dull-looking skin.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Aloe Barbadensis Leaf Juice

Propanediol

Persea Gratissima Oil

Butyrospermum Parkii Butter

Polyacrylamide

Caprylic/Capric Triglyceride

Bisabolol

Sodium Hyaluronate

Glycerin

Zingiber Officinale Root Extract

Cucumis Sativus Fruit Extract

Phenoxyethanol

Ethylhexylglycerin

Caffeine

Polysorbate 80

Melia Azadirachta Leaf Extract

Melia Azadirachta Flower Extract

Corallina Officinalis Extract

Coccinia Indica Fruit Extract

Solanum Melongena Fruit Extract

Aloe Barbadensis Flower Extract

Simmondsia Chinensis Seed Oil

Ocimum Sanctum Leaf Extract

Ocimum Basilicum Flower/Leaf Extract

Curcuma Longa Root Extract

Tocopheryl Acetate

Phytonadione Epoxide

Saccharide Isomerate

Citric Acid

Sodium Citrate

Phytic Acid

Mannitol

C13-14 Isoparaffin

Laureth-7

Sodium Hydroxide

Water, Aloe Barbadensis Leaf Juice, Propanediol, Persea Gratissima Oil, Butyrospermum Parkii Butter, Polyacrylamide, Caprylic/Capric Triglyceride, Bisabolol, Sodium Hyaluronate, Glycerin, Zingiber Officinale Root Extract, Cucumis Sativus Fruit Extract, Phenoxyethanol, Ethylhexylglycerin, Caffeine, Polysorbate 80, Melia Azadirachta Leaf Extract, Melia Azadirachta Flower Extract, Corallina Officinalis Extract, Coccinia Indica Fruit Extract, Solanum Melongena Fruit Extract, Aloe Barbadensis Flower Extract, Simmondsia Chinensis Seed Oil, Ocimum Sanctum Leaf Extract, Ocimum Basilicum Flower/Leaf Extract, Curcuma Longa Root Extract, Tocopheryl Acetate, Phytonadione Epoxide, Saccharide Isomerate, Citric Acid, Sodium Citrate, Phytic Acid, Mannitol, C13-14 Isoparaffin, Laureth-7, Sodium Hydroxide

Ascorbic Acid

Dimethicone

Cetearyl Alcohol

Glyceryl Isostearate

Glyceryl Stearate

PEG-100 Stearate

Panthenol

Dipotassium Glycyrrhizate

Hydrogenated Jojoba Oil

Ceramide NP

Ceramide AP

Ceramide EOP

Carbomer

Copernicia Cerifera Cera

Cetearyl Glucoside

Behentrimonium Methosulfate

Triethyl Citrate

Silica

Sodium Lauroyl Lactylate

Cholesterol

Tocopherol

Hydrogenated Lecithin

Hydroxyacetophenone

Caprylyl Glycol

Trisodium Ethylenediamine Disuccinate

Xanthan Gum

Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate

Phytosphingosine

Polyacrylate Crosspolymer-6

Benzoic Acid

Water, Glycerin, Ascorbic Acid, Propanediol, Dimethicone, Caprylic/Capric Triglyceride, Cetearyl Alcohol, Glyceryl Isostearate, Sodium Hydroxide, Glyceryl Stearate, PEG-100 Stearate, Panthenol, Dipotassium Glycyrrhizate, Hydrogenated Jojoba Oil, Ceramide NP, Ceramide AP, Ceramide EOP, Carbomer, Copernicia Cerifera Cera, Cetearyl Glucoside, Behentrimonium Methosulfate, Triethyl Citrate, Caffeine, Silica, Sodium Hyaluronate, Sodium Lauroyl Lactylate, Cholesterol, Phenoxyethanol, Tocopherol, Hydrogenated Lecithin, Hydroxyacetophenone, Citric Acid, Caprylyl Glycol, Trisodium Ethylenediamine Disuccinate, Xanthan Gum, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Phytosphingosine, Polyacrylate Crosspolymer-6, Benzoic Acid

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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.

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.

Caprylic/Capric Triglyceride (aka MCT Oil) is a lightweight emollient, solvent, and texture enhancer. It is considered a skin-softener by helping to prevent moisture loss.

Though it behaves like an oil, it is not technically one due to its chemical composition. One perk of this ingredient is that it is very stable, resistant to oxidation, and unlikely to go rancid.

In practice, that translates to a long shelf life and a consistently elegant skin feel.

While there is an assumption Caprylic Triglyceride can clog pores due to it being derived from coconut oil, there is no research supporting this. Just patch test if you have concerns.

Fractionated coconut oil and MCT Oil are both listed as Caprylic/Capric Triglyceride according to INCI. This is because INCI names are based on the ingredient’s final chemical composition and not its marketing name or source.

This ingredient is treated as the gold standard fungal acne safe oil. Even though it is coconut derived, the problematic lauric acid is stripped out.

This leaves just caprylic (C8) and capric (C10) acid. These chain lengths actually trend antifungal; a 2020 study found caprylic acid was enough to disrupt Malassezia furfur cell membrane, with a caprylic acid derivative damaging membrane structures at concentrations as low as 0.2%.

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.

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.

Propanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.

It’s often used to:

Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.

Sodium Hyaluronate is the salt form of hyaluronic acid. It is a long sugar chain that is naturally found in your skin, joints, and connective tissue that maintains hydration and elasticity.

In skincare, it works as a humectant. It pulls water from the environment and deeper layers of skin and binds it to the surface.

Interestingly, the size of the molecule affects its behavior:

Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and barrier repair.

Many serums use a blend of both weights so you can get surface hydration plus longer-lasting and deeper effects.

You'll typically see concentrations between 0.1-2% for this ingredient.

Sodium Hydroxide is also known as lye or caustic soda. It is used to adjust the pH of products; many ingredients require a specific pH to be effective.

In small amounts, sodium hydroxide is considered safe to use. However, large amounts may cause chemical burns due to its high alkaline.

Your skin has a natural pH and acid mantle. This acid mantle helps prevent harmful bacteria from breaking through. The acid mantle also helps keep your skin hydrated.

"Alkaline" refers to a high pH level. A low pH level would be considered acidic.

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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