Skin science article
CeraVe Ultra-Light Moisturizing Lotion SPF 30 Versus First Aid Beauty Ultra Repair Face Moisturizer
CeraVe Ultra-Light Moisturizing Lotion SPF 30 Versus First Aid Beauty Ultra Repair Face Moisturizer This barrier-repair day moisturizer is formulated around Methyl Methacrylate Crosspolymer and Ceramide NP to strengthen the skin barrier and hydrate skin. This
CeraVe Ultra-Light Moisturizing Lotion SPF 30 Versus First Aid Beauty Ultra Repair Face Moisturizer
This barrier-repair day moisturizer is formulated around Methyl Methacrylate Crosspolymer and Ceramide NP to strengthen the skin barrier and hydrate skin.
This barrier-repair moisturizer is formulated around Avena Sativa Kernel Flour and Squalane to strengthen the skin barrier and calm redness.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Butyl Methoxydibenzoylmethane 3%
Homosalate 10%
Ethylhexyl Salicylate 5%
Octocrylene 2.7%
Water
C12-15 Alkyl Benzoate
Glyceryl Stearate Se
Methyl Methacrylate Crosspolymer
Glycerin
Pentylene Glycol
Ceramide NP
Ceramide AP
Ceramide EOP
Carbomer
Sodium Acryloyldimethyltaurate/Vp Crosspolymer
Sodium Lauroyl Lactylate
Sodium Hyaluronate
Cholesterol
Phenoxyethanol
Disodium EDTA
Hydroxyacetophenone
Citric Acid
Phytosphingosine
Xanthan Gum
T-Butyl Alcohol
Ethylhexylglycerin
Butyl Methoxydibenzoylmethane 3%, Homosalate 10%, Ethylhexyl Salicylate 5%, Octocrylene 2.7%, Water, C12-15 Alkyl Benzoate, Glyceryl Stearate Se, Methyl Methacrylate Crosspolymer, Glycerin, Pentylene Glycol, Ceramide NP, Ceramide AP, Ceramide EOP, Carbomer, Sodium Acryloyldimethyltaurate/Vp Crosspolymer, Sodium Lauroyl Lactylate, Sodium Hyaluronate, Cholesterol, Phenoxyethanol, Disodium EDTA, Hydroxyacetophenone, Citric Acid, Phytosphingosine, Xanthan Gum, T-Butyl Alcohol, Ethylhexylglycerin
Caprylic/Capric Triglyceride
Dimethicone
Urea
Cetyl Alcohol
Avena Sativa Kernel Flour
Squalane
Caprylyl Glycol
Butyrospermum Parkii Butter
Allantoin
Persea Gratissima Oil
N-Butyl Alcohol
Chrysanthemum Parthenium Extract
Camellia Sinensis Leaf Extract
Glycyrrhiza Glabra Root Extract
Sodium Hydroxide
Leuconostoc/Radish Root Ferment Filtrate
Tetrasodium EDTA
Water, Glyceryl Stearate Se, Glycerin, Caprylic/Capric Triglyceride, Dimethicone, Urea, Cetyl Alcohol, Avena Sativa Kernel Flour, Squalane, Caprylyl Glycol, Butyrospermum Parkii Butter, Allantoin, Persea Gratissima Oil, N-Butyl Alcohol, Carbomer, Chrysanthemum Parthenium Extract, Camellia Sinensis Leaf Extract, Glycyrrhiza Glabra Root Extract, Sodium Hydroxide, Ceramide NP, Leuconostoc/Radish Root Ferment Filtrate, Phenoxyethanol, Tetrasodium EDTA
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.
Carbomer is a synthetic thickening and gelling agent. It's basically the ingredient that gives a lot of serums, gels, creams, and sunscreens their smooth, non-sticky texture.
Although legally permitted at very high levels, carbomers are normally used at concentrations below 1%.
It also needs to be neutralized to actually thicken, and because it is a large molecule, it doesn't really penetrate the skin barrier.
Allergy-wise, the risk is very low. Clinical studies show carbomers have low potential for skin irritation/sensitization even at concentrations up to 100%.
A 2024 UK study patch-tested 1,302 patients and found true allergy to the parent group of carbomer to be rare with no confirmed relevant reactions.
Ceramide NP (formerly known as Ceramide 3) is one of the skin's naturally occurring lipids.
Since ceramides are the major lipid components of the skin, they are crucial for maintaining skin barrier and hydration. Ceramide NP most closely mirrors the dominant kind in human skin amongst ceramide subtypes.
This ceramide works by slotting into gaps within the stratum corneum's lipid matrix to limit trans-epidermal water loss (TEWL) and shield the skin against external irritants.
A study with 312 patients found that using a ceramide-containing routine for 4 weeks reduced the severity of atopic dermatitis by over 61%.
Another clinical study in subjects aged 60 and older found that a ceramide body wash and moisturizer improved skin dryness and itchy skin in 15 days.
Overall, ceramides are considered non-irritating and safety tests have found little to no observable adverse effects from using this ingredient.
Ceramide NP is usually sourced from plants (like soybean or rice bran), or produced synthetically.
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.
Glyceryl Stearate Se is a self-emulsifying (SE) form of glyceryl stearate. Self-emusifying means this ingredient automatically blends with water. It is an emulsifier, emollient, and cleansing agent.
As an emulsifier, Glyceryl Stearate Se prevents ingredients such as oil and water from separating. It is also a surfactant, meaning it helps cleanse the skin. Surfactants help gather oil, dirt, and other pollutants so they may be rinsed away easily.
Emollients help your skin stay smooth and soft. It does so by creating a film on top of the skin that helps trap moisture in.
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.
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!