Good Molecules Hyaluronic Acid Serum Versus Peter Thomas Roth Water Drench Hyaluronic Cloud Cream Hydrating Moisturizer

Good Molecules Hyaluronic Acid Serum Versus Peter Thomas Roth Water Drench Hyaluronic Cloud Cream Hydrating Moisturizer

This hydrating serum is formulated around Sodium Hyaluronate to hydrate skin.

This barrier-repair moisturizer is formulated around Sodium Hyaluronate and Ceramide NP to strengthen the skin barrier and hydrate skin.

What's inside

Key Ingredients

Benefits

Concerns

No concerns

Ingredients Side-by-side

Water

Propanediol

Glycerin

Sodium Hyaluronate

Hydroxyacetophenone

Sodium Citrate

Citric Acid

Ethylhexylglycerin

Tocopherol

Water, Propanediol, Glycerin, Sodium Hyaluronate, Hydroxyacetophenone, Sodium Citrate, Citric Acid, Ethylhexylglycerin, Tocopherol

Cyclopentasiloxane

Dipropylene Glycol

Dimethicone

Cyclohexasiloxane

Yeast Extract

Ceramide EOP

Ceramide Eos

Ceramide AP

Ceramide NP

Ceramide Ns

Sambucus Nigra Fruit Extract

Hydrolyzed Silk

Sodium PCA

Ascorbyl Palmitate

Caprooyl Phytosphingosine

Caprooyl Sphingosine

Saccharide Isomerate

Saccharomyces/Magnesium Ferment

Saccharomyces/Iron Ferment

Saccharomyces/Copper Ferment

Saccharomyces/Silicon Ferment

Saccharomyces/Zinc Ferment

Olea Europaea Leaf Extract

Methyl Gluceth-20

Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone

Cholesterol

Sodium Chloride

Behenic Acid

Propylene Glycol

Ceteareth-25

Butylene Glycol

Dimethicone/PEG-10/15 Crosspolymer

Cetyl Alcohol

Disodium EDTA

Sodium Benzoate

Potassium Sorbate

Phenoxyethanol

Mica

Water, Glycerin, Cyclopentasiloxane, Dipropylene Glycol, Dimethicone, Cyclohexasiloxane, Yeast Extract, Sodium Hyaluronate, Ceramide EOP, Ceramide Eos, Ceramide AP, Ceramide NP, Ceramide Ns, Sambucus Nigra Fruit Extract, Hydrolyzed Silk, Sodium PCA, Tocopherol, Ascorbyl Palmitate, Caprooyl Phytosphingosine, Caprooyl Sphingosine, Saccharide Isomerate, Saccharomyces/Magnesium Ferment, Saccharomyces/Iron Ferment, Saccharomyces/Copper Ferment, Saccharomyces/Silicon Ferment, Saccharomyces/Zinc Ferment, Olea Europaea Leaf Extract, Methyl Gluceth-20, Ethylhexylglycerin, Lauryl PEG-9 Polydimethylsiloxyethyl Dimethicone, Cholesterol, Sodium Chloride, Sodium Citrate, Citric Acid, Behenic Acid, Propylene Glycol, Ceteareth-25, Butylene Glycol, Dimethicone/PEG-10/15 Crosspolymer, Cetyl Alcohol, Disodium EDTA, Sodium Benzoate, Potassium Sorbate, Phenoxyethanol, Mica

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.

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.

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.

Sodium Citrate is the sodium salts of citric acid. In skincare, it is used to alter pH levels and acts as a preservative.

Its main functions are to maintain the pH of a product and neutralize metal ions.

The acidity of our skin is maintained by our glands and skin biome; normal pH level of skin is slightly acidic (~4.75-5.5).

Being slightly acidic allows our skin to create an "acid mantle". This acid mantle is a thin barrier that protects our skin from bacteria and contaminants.

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.

Tocopherol is a fat-soluble antioxidant known as Vitamin E.

You'll find this ingredient in the vast majority of skincare (for good reason). It works to neutralize free radicals, or unstable molecules generated by UV exposure, pollution, and other environmental stressors, before they can cause oxidative damage to your skin cells.

Topically applied tocopherol has been shown to protect against UV damage by ramping up the skin's own natural defense enzymes.

It also acts as a skin conditioning agent; some studies show that regular topical use can improve the skin's water-binding capacity over 2-4 weeks.

This ingredient is especially loved for being a team player. When combined with Vitamin C, the photoprotective effect of both ingredients roughly doubles and the combo also helps reduce UV-induced DNA damage.

This ingredient has some brightening potential but it's more of a prevention ingredient than spot-fader. Cell studies show it can slow down melanin production but it's worth noting that it's not the most powerful brightener out there.

In formulations, it also serves as a stabilizer that helps protect other oxidation-prone ingredients from degrading.

Concentrations usually range from 0.1-1% in most leave-on products.

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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