Skin science article
Neutrogena Hydro Boost Gel Cream Versus Paula's Choice Rescue & Repair Weightless Moisturizer
Neutrogena Hydro Boost Gel Cream Versus Paula's Choice Rescue & Repair Weightless Moisturizer This barrier-repair moisturizer is formulated around Sodium Hyaluronate to strengthen the skin barrier and hydrate skin. This barrier-repair moisturizer is formulated
Neutrogena Hydro Boost Gel Cream Versus Paula's Choice Rescue & Repair Weightless Moisturizer
This barrier-repair moisturizer is formulated around Sodium Hyaluronate to strengthen the skin barrier and hydrate skin.
This barrier-repair moisturizer is formulated around Squalane and Allantoin to strengthen the skin barrier and calm redness.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Glycerin
Dimethicone
Cetearyl Olivate
Sorbitan Olivate
Sodium Hyaluronate
Serine
Glycine
Alanine
Threonine
Arginine
Proline
Lysine Hcl
Glutamic Acid
Sodium PCA
PCA
Sodium Lactate
Urea
Sodium Chloride
Citric Acid
Betaine
Allantoin
Fructose
Maltose
Trehalose
Glucose
Pentylene Glycol
Synthetic Beeswax
Polyacrylate Crosspolymer-6
Dimethicone Crosspolymer
Dimethiconol
Ethylhexylglycerin
Caprylyl Glycol
Sodium Hydroxide
Water, Glycerin, Dimethicone, Cetearyl Olivate, Sorbitan Olivate, Sodium Hyaluronate, Serine, Glycine, Alanine, Threonine, Arginine, Proline, Lysine Hcl, Glutamic Acid, Sodium PCA, PCA, Sodium Lactate, Urea, Sodium Chloride, Citric Acid, Betaine, Allantoin, Fructose, Maltose, Trehalose, Glucose, Pentylene Glycol, Synthetic Beeswax, Polyacrylate Crosspolymer-6, Dimethicone Crosspolymer, Dimethiconol, Ethylhexylglycerin, Caprylyl Glycol, Sodium Hydroxide
Caprylic/Capric Triglyceride
Stearic Acid
Triheptanoin
C13-16 Isoalkane
Butylene Glycol
Propanediol
Inulin
Glyceryl Stearate
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Squalane
Ethylhexyl Stearate
Sodium Phytate
Hexylene Glycol
Alpha-Glucan Oligosaccharide
Glycogen
Laminaria Digitata Extract
Albatrellus Confluens Extract
Opuntia Ficus-Indica Stem Extract
Galactoarabinan
Maltodextrin
Schizophyllan
Acetyl Hexapeptide-8
Phenoxyethanol
Potassium Sorbate
Water, Glycerin, Caprylic/Capric Triglyceride, Stearic Acid, Triheptanoin, C13-16 Isoalkane, Butylene Glycol, Propanediol, Inulin, Glyceryl Stearate, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Squalane, Ethylhexyl Stearate, Sodium Hydroxide, Caprylyl Glycol, Allantoin, Sodium Phytate, Ethylhexylglycerin, Hexylene Glycol, Alpha-Glucan Oligosaccharide, Glycogen, Laminaria Digitata Extract, Albatrellus Confluens Extract, Opuntia Ficus-Indica Stem Extract, Galactoarabinan, Citric Acid, Maltodextrin, Schizophyllan, Acetyl Hexapeptide-8, Phenoxyethanol, Potassium Sorbate
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.
Allantoin is a soothing ingredient known for its protective and moisturizing properties; it's basically a quiet workhorse ingredient you can find in a huge range of cosmetics.
Though it can be derived from the comfrey plant, allantoin is produced synthetically for cosmetic products to ensure purity.
Research shows it can encourage your skin cells to turn over and renew by stimulating keratinocyte and fibroblast proliferation.
It also has mild keratolytic properties to help loosen and shed dead skin cells without being harsh.
Studies also suggest allantoin can help calm inflammation by dialing down some of the chemical signals your skin sends out when it is irritated.
This ingredient is typically used in the 0.1-0.5% range, and the FDA recognizes it as a skin protectant in OTC products up to 2%.
Overall, allantoin is a wonderful addition to most routines; it is stable across a wide pH range (~4-8), works well with other ingredients, and is considered non-sensitizing/non-irritating.
Fun fact: Allantoin is naturally occurring in comfrey root, beets, chamomile, and wheat sprouts. Our bodies even produce it as a byproduct of uric acid metabolism.
Caprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created.
Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin.
Because it is not a free-fatty acid, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on).
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 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!