Explore Routine Login
Versus

SkinBetter Science Alto Defense Serum Versus SkinCeuticals C + AHA

Serum
Serum
American Brand United States
American Brand United States

Overview

What they are

These products are both reef safe serums. They have a total of 5 ingredients in common

Cool Features

They both contain Vitamin C

Suited For

They're both likely to be good for anti aging, dry skin, brightening skin, reducing pores, scar healing, dark spots and better texture

Free From

They both do not contain any harsh alcohols, common allergens, oils, parabens or silicones

We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.

Ingredient Info

Click any item below to learn more and see relevant ingredients

Free from

Safety & Ethics

American Brand

Brand country of origin

Free from

Safety & Ethics

American Brand

Brand country of origin

At a glance

Click on any of the items below to learn more

Ingredients, at a glance

What's in this product, and how it might affect your skin.

Notable Ingredients

Benefits

Concerns

Ingredients, at a glance

What's in this product, and how it might affect your skin.

Notable Ingredients

Benefits

Concerns

Ingredients Side-by-side

found in both products
Alto Defense Serum
Water Skin Conditioning, Solvent

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.

Loved by users
Learn more
Butylene Glycol Humectant, Masking, Skin Conditioning
1 / 0

Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:

1 Com. / 0 Irr.
Mixed reviews
Learn more
Propanediol Solvent

Propanediol helps absorb ingredients into your skin, boosting their benefits. It can act as an emollient, making your skin softer. Propanediol can help products last longer by boosting the properties of preservatives within the formulation.

Liked by users
Learn more
Ethylhexyl Olivate Skin Conditioning
Not safe for Fungal Acne Icon

Ethylhexyl Olivate isn't fungal acne safe.

Very disliked
Not safe for Fungal AcneNot safe for Fungal Acne Icon
Learn more
Cetearyl Alcohol Emollient, Emulsifying, Emulsion Stabilising
2 / 1 Fatty Alcohol IconMay worsen Oily Skin IconBad for Acne Prone Skin IconNot safe for Fungal Acne Icon

Cetearyl alcohol is a mixture of two fatty alcohols: cetyl alcohol and stearyl alcohol. It is mainly used as an emulsifier. Emulsifiers help prevent the separation of oils and products. Due to its composition, it can also be used to thicken a product or help create foam.

2 Com. / 1 Irr.
Very disliked
Fatty AlcoholFatty Alcohol Icon3 Concerns
Learn more
Chlorogenic Acids Antioxidant, Skin Conditioning, Skin Protecting
Antioxidant Icon

Chlorogenic acid refers to a group of related acids including caffeic acid, ferulic acid and p-coumaric acid.

Not enough ratings
AntioxidantAntioxidant Icon
Learn more
Hydrolyzed Sodium Hyaluronate Skin Conditioning

This ingredient is created by putting sodium hyaluronate through hydrolysis.

Mixed reviews
Learn more
Lauryl Lactate Emollient, Skin Conditioning

We don't have a description for Lauryl Lactate yet.

Not enough ratings
Learn more
Dimethyl Isosorbide Solvent

Dimethyl Isosorbide is a solvent and helps deliver actives into your skin. It is created from sorbitol.

Mixed reviews
Learn more
Glycyrrhiza Glabra Root Extract Bleaching, Emollient, Skin Conditioning
Good for Dark Spots Icon

Glycyrrhiza Glabra Root Extract is an extract of the roots of Licorice. It has been found to have several benefits such as skin hydrating, conditioning, and soothing.

Liked by users
Good for Dark SpotsGood for Dark Spots Icon
Learn more
Ascorbyl Tetraisopalmitate Antioxidant, Emollient, Skin Conditioning
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconHelps with Anti-Aging IconGood for Dark Spots IconNot safe for Fungal Acne Icon

Ascorbyl Tetraisopalmitate is a version of ascorbic acid, or pure Vitamin C.

Liked by users
Vitamin CVitamin C IconAntioxidantAntioxidant Icon4 BenefitsNot safe for Fungal AcneNot safe for Fungal Acne Icon
Learn more
Ergothioneine Antioxidant
Antioxidant Icon

Ergothioneine is an antioxidant.

Loved by users
AntioxidantAntioxidant Icon
Learn more
Benzylidene Dimethoxydimethylindanone Skin Protecting

We don't have a description for Benzylidene Dimethoxydimethylindanone yet.

Not enough ratings
Learn more
Arabidopsis Thaliana Extract Antioxidant
Antioxidant Icon

Arabidopsis Thaliana Extract is an antioxidant.

Not enough ratings
AntioxidantAntioxidant Icon
Learn more
Carnosine Skin Conditioning

Carnosine is a dipeptide made from two amino acids.

Loved by users
Learn more
Camellia Sinensis Leaf Extract Antimicrobial, Antioxidant, Astringent
Antioxidant IconHelps reduce Skin Redness IconHelps reduce irritation IconGood for Minimizing Pores IconHelps with Anti-Aging IconHelps fight Acne Icon

Camellia Sinensis Leaf Extract is derived from the leaves of the tea plant. Black tea, green tea, and oolong tea are all harvested from this plant.

Loved by users
AntioxidantAntioxidant Icon5 Benefits
Learn more
Vitis Vinifera Seed Extract Antimicrobial, Antioxidant, Skin Protecting
Antioxidant Icon

Vitis Vinifera Seed Extract comes from the grape vine. Grape seeds are a byproduct of creating grape juice or wine.

Loved by users
AntioxidantAntioxidant Icon
Learn more
Theobroma Cacao Seed Extract Antioxidant
Antioxidant Icon

Theobroma Cacao Seed Extract comes from the Theobroma cacoa, or Cacao tree. Cacao trees are native to tropical landscapes.

Liked by users
AntioxidantAntioxidant Icon
Learn more
Curcuma Longa Root Extract Masking, Perfuming
Fragrance Icon

Curcuma Longa Root Extract is from the spice, turmeric. Besides being a healthy and delicious spice, turmeric also has plenty of skincare benefits. It has anti-inflammatory, antioxidant, and anti-microbial properties.

Liked by users
FragranceFragrance Icon
Learn more
Olea Europaea Fruit Extract Bleaching, Skin Conditioning

Olea Europaea Fruit Extract is extract from the olive fruit.

Not enough ratings
Learn more
Euterpe Oleracea Fruit Extract

This extract comes from the Cabbage Palm, AKA the Açaí berry! It has skin soothing, antioxidant, and anti-aging properties.

Liked by users
Learn more
Trifluoroacetyl Tripeptide-2 Skin Conditioning, Skin Protecting
Peptide Icon

Trifluoroacetyl Tripeptide-2 is a peptide.

Liked by users
PeptidePeptide Icon
Learn more
Buddleja Officinalis Flower Extract UV Filter

We don't have a description for Buddleja Officinalis Flower Extract yet.

Not enough ratings
Learn more
Coffea Arabica Leaf Cell Extract Antioxidant
Antioxidant Icon

Coffea Arabica Leaf Cell Extract is an antioxidant.

Not enough ratings
AntioxidantAntioxidant Icon
Learn more
Crocus Sativus Leaf Cell Culture Extract Skin Protecting

We don't have a description for Crocus Sativus Leaf Cell Culture Extract yet.

Not enough ratings
Learn more
Superoxide Dismutase Antioxidant, Skin Conditioning
Antioxidant Icon

Superoxide Dismutase is found in all living cells. This ingredient is AKA as 'SOD'.

Loved by users
AntioxidantAntioxidant Icon
Learn more
Ubiquinone Antioxidant, Skin Conditioning
Antioxidant IconHelps with Anti-Aging Icon

Ubiquinone (Coenzyme Q10) is a molecule already found in our bodies. It is a potent antioxidant and skin-soothing ingredient.

Loved by users
AntioxidantAntioxidant IconHelps with Anti-AgingHelps with Anti-Aging Icon
Learn more
Zingiber Officinale Root Extract Masking, Skin Conditioning, Tonic

Zingiber Officinale is more commonly known as ginger.

Liked by users
Learn more
Ceramide NP Skin Conditioning
Ceramide IconHelps hydrate Dry Skin IconHelps reduce Skin Redness IconHelps reduce irritation IconHelps with Anti-Aging Icon

Ceramide NP is a type of ceramide.

Loved by users
CeramideCeramide Icon4 Benefits
Learn more
Ceramide AP Skin Conditioning
Ceramide IconHelps hydrate Dry Skin IconHelps reduce Skin Redness IconHelps reduce irritation IconHelps with Anti-Aging Icon

Ceramide AP is a type of Ceramide.

Loved by users
CeramideCeramide Icon4 Benefits
Learn more
Ceramide EOP Skin Conditioning
Ceramide IconHelps hydrate Dry Skin IconHelps reduce Skin Redness IconHelps reduce irritation IconHelps with Anti-Aging Icon

Ceramide EOP is a type of Ceramide.

Loved by users
CeramideCeramide Icon4 Benefits
Learn more
Linoleic Acid Cleansing, Emollient, Skin Conditioning
Helps hydrate Dry Skin IconMay worsen Oily Skin IconBad for Acne Prone Skin IconNot safe for Fungal Acne Icon

Linoleic Acid is Vitamin F and a fatty acid. It is an emollient and helps thicken texture. Linoleic acid helps with hydrating skin and nourishing the skin's barrier. The top layer of skin, or epidermis, contains high amounts of linoleic acid naturally.

Mixed reviews
Helps hydrate Dry SkinHelps hydrate Dry Skin Icon3 Concerns
Learn more
Linolenic Acid Cleansing, Emollient, Perfuming
Fragrance IconNot safe for Fungal Acne Icon

Linolenic Acid is a fatty acid. Our bodies need to consume this to use it. Linolenic Acid helps condition and restore skin. It is also used to treat inflammation and hyperpigmentation.

Mixed reviews
FragranceFragrance IconNot safe for Fungal AcneNot safe for Fungal Acne Icon
Learn more
Sea Whip Extract Skin Conditioning

We don't have a description for Sea Whip Extract yet.

Liked by users
Learn more
Bisabolol Masking, Skin Conditioning, Soothing
Helps reduce irritation Icon

Bisabolol is pimarily used to add fragrance to a product. However, it is also famous for helping soothe skin.

Loved by users
Helps reduce irritationHelps reduce irritation Icon
Learn more
Tocopherol Antioxidant, Masking, Skin Conditioning
0-3 / 0-3 Vitamin E IconAntioxidant IconHelps hydrate Dry Skin IconHelps with Anti-Aging IconGood for Scar Healing IconHelps brighten skin IconMay cause irritation Icon

Tocopherol (also known as Vitamin E) is a common antioxidant used to help protect the skin from free-radicals and strengthen the skin barrier. It's also fat soluble - this means our skin is great at absorbing it.

0-3 Com. / 0-3 Irr.
Liked by users
Vitamin EVitamin E IconAntioxidantAntioxidant Icon4 BenefitsMay cause irritationMay cause irritation Icon
Learn more
Tocopheryl Acetate Antioxidant, Skin Conditioning
0 / 0 Vitamin E IconAntioxidant IconHelps brighten skin Icon

Tocopheryl Acetate is AKA Vitamin E. It is an antioxidant and protects your skin from free radicals. Free radicals damage the skin by breaking down collagen.

0 Com. / 0 Irr.
Liked by users
Vitamin EVitamin E IconAntioxidantAntioxidant IconHelps brighten skinHelps brighten skin Icon
Learn more
Cholesterol Emollient, Emulsifying, Skin Conditioning
0 / 0 Helps hydrate Dry Skin IconHelps reduce Skin Redness Icon

Cholesterol is a class of organic molecules called lipids. It helps hydrate your skin and is essential to having a healthy skin barrier.

0 Com. / 0 Irr.
Loved by users
2 Benefits
Learn more
Phytosphingosine Skin Conditioning

Phytosphingosine is a phospholipid naturally found in our skin. It helps moisturize, soothe, and protect skin.

Liked by users
Learn more
Jojoba Esters Emollient, Moisturising, Skin Conditioning
Not safe for Fungal Acne Icon

Jojoba Esters is a wax created from Jojoba oil. It is an emollient and film-forming ingredient. In bead form, it is an exfoliator.

Disliked by users
Not safe for Fungal AcneNot safe for Fungal Acne Icon
Learn more
Sodium PCA Humectant, Skin Conditioning
0 / 0

Sodium PCA is the sodium salt of pyroglutamic acid and is naturally occurring on human skin.

0 Com. / 0 Irr.
Loved by users
Learn more
Pentylene Glycol Skin Conditioning, Solvent

Pentylene glycol is typically used within a product to thicken it. It also adds a smooth, soft, and moisturizing feel to the product. It is naturally found in plants such as sugar beets.

Mixed reviews
Learn more
Methyl Gluceth-20 Humectant, Moisturising

Methyl Gluceth-20 is a humectant. Humectants help draw moisture from the air to your skin.

Liked by users
Learn more
Glycerin Humectant, Skin Conditioning, Skin Protecting
0 / 0 Helps hydrate Dry Skin IconHelps brighten skin Icon

Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.

0 Com. / 0 Irr.
Loved by users
2 Benefits
Learn more
Helianthus Annuus Seed Wax Skin Conditioning
Not safe for Fungal Acne Icon

Helianthus Annuus Seed Wax is created from the common sunflower.

Disliked by users
Not safe for Fungal AcneNot safe for Fungal Acne Icon
Learn more
Acacia Decurrens Flower Wax Emollient, Skin Conditioning
Not safe for Fungal Acne Icon

Acacia Decurrens Flower Wax isn't fungal acne safe.

Not enough ratings
Not safe for Fungal AcneNot safe for Fungal Acne Icon
Learn more
Lecithin Emollient, Emulsifying, Skin Conditioning

Lecithin is a term for a group of substances found in plants, animals, and humans. They are made up of mixture of fatty acids. These fatty acids usually are a mixture of phosphoric acid's choline ester connected to stearic, oleic, and palmitic acids. Most lecithins are created from plant ingredients scuh as sunflower.

Mixed reviews
Learn more
Sodium Lauroyl Lactylate Emulsifying

Sodium Lauroyl Lactylate is the lauric acid sodium salt of lactyl lactate.

Liked by users
Learn more
Dicetyl Phosphate Emulsifying

We don't have a description for Dicetyl Phosphate yet.

Not enough ratings
Learn more
Propanediol Dicaprylate/Caprate Emollient

We don't have a description for Propanediol Dicaprylate/Caprate yet.

Not enough ratings
Learn more
Polyglycerin-3 Humectant

Polyglycerin-3 is a 3-unit glycerin polymer.

Loved by users
Learn more
Ceteth-20 Phosphate Cleansing

We don't have a description for Ceteth-20 Phosphate yet.

Not enough ratings
Learn more
Diisostearyl Malate Emollient, Skin Conditioning

Diisostearyl Malate is an emollient and most often used in lip products. It comes from isostearyl alcohol, a fatty acid, and malic acid, an AHA.

Mixed reviews
Learn more
Xanthan Gum Emulsifying, Emulsion Stabilising, Gel Forming

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.

Disliked by users
Learn more
Steareth-2 Emulsifying
2 / 2

Steareth-2 is a waxy compound used to emulsify ingredients. It is created from polyethylene glycol and stearyl alcohol.

2 Com. / 2 Irr.
Very disliked
Learn more
Acacia Senegal Gum Masking

We don't have a description for Acacia Senegal Gum yet.

Disliked by users
Learn more
Carbomer Emulsion Stabilising, Gel Forming
1 / 0

Carbomer is a polymer of acrylic acid. Its main role is to create gel consistency within products.

1 Com. / 0 Irr.
Disliked by users
Learn more
Acrylates/C10-30 Alkyl Acrylate Crosspolymer Emulsion Stabilising

Acrylates/C10-30 Alkyl Acrylate Crosspolymer is a synthetic polymer. It is used to thicken and improve the texture of products.

Disliked by users
Learn more
Dextran

We don't have a description for Dextran yet.

Not enough ratings
Learn more
Sodium Hydroxide Buffering

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.

Mixed reviews
Learn more
Citric Acid Buffering, Masking
AHA IconGood for Skin Texture IconGood for Minimizing Pores IconGood for Scar Healing IconHelps brighten skin IconMay cause irritation IconMay worsen Rosacea Icon

Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).

Disliked by users
AHAAHA Icon4 Benefits2 Concerns
Learn more
Disodium EDTA

Disodium EDTA plays a role in making products more stable by aiding other preservatives.

Disliked by users
Learn more
Ethylhexylglycerin Skin Conditioning

Ethylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.

Mixed reviews
Learn more
Phenoxyethanol Preservative
Preservative Icon

Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent microbial growth. By itself, it has a scent that is similar to that of a rose.

Very disliked
PreservativePreservative Icon
Learn more
C + AHA
Water Skin Conditioning, Solvent

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.

Loved by users
Learn more
Ascorbic Acid Antioxidant, Buffering, Masking
Vitamin C IconAntioxidant IconHelps reduce Skin Redness IconGood for Skin Texture IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps brighten skin Icon

Ascorbic Acid is is pure Vitamin C. This form makes up the largest amount of vitamin C found naturally in our skin.

Loved by users
Vitamin CVitamin C IconAntioxidantAntioxidant Icon6 Benefits
Learn more
Triethanolamine Buffering, Emulsifying, Masking
2 / 0

Triethanolamine is an emulsifier and pH adjuster. It is created using ethylene oxide and ammonia. This gives Triethanolamine a nitrogen core and a similar scent to ammonia.

2 Com. / 0 Irr.
Very disliked
Learn more
Glycolic Acid Buffering
AHA IconGood for Oily Skin IconGood for Skin Texture IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps brighten skin IconMay cause irritation IconMay worsen Rosacea Icon

Glycolic Acid is arguably the most famous AHA with a ton of research to back up its benefits.

Loved by users
AHAAHA Icon7 Benefits2 Concerns
Learn more
Propylene Glycol Humectant, Skin Conditioning, Solvent
0 / 0 May worsen Eczema Icon

Propylene Glycol is an odorless, colorless liquid. As a humectant, it helps skin retain moisture. It also aids in delivering active ingredients.

0 Com. / 0 Irr.
Very disliked
May worsen EczemaMay worsen Eczema Icon
Learn more
Glycerin Humectant, Skin Conditioning, Skin Protecting
0 / 0 Helps hydrate Dry Skin IconHelps brighten skin Icon

Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.

0 Com. / 0 Irr.
Loved by users
2 Benefits
Learn more
Citric Acid Buffering, Masking
AHA IconGood for Skin Texture IconGood for Minimizing Pores IconGood for Scar Healing IconHelps brighten skin IconMay cause irritation IconMay worsen Rosacea Icon

Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).

Disliked by users
AHAAHA Icon4 Benefits2 Concerns
Learn more
Lactic Acid Buffering, Humectant, Skin Conditioning
AHA IconGood for Skin Texture IconGood for Minimizing Pores IconHelps with Anti-Aging IconGood for Dark Spots IconGood for Scar Healing IconHelps brighten skin IconMay cause irritation IconMay worsen Eczema IconMay worsen Rosacea Icon

Lactic Acid is an AHA that is derived from fermenting lactose, a carbohydrate from milk. It removes the top layer of old and dead skin cells and helps increase cell turnover.

Loved by users
AHAAHA Icon6 Benefits3 Concerns
Learn more
Phenoxyethanol Preservative
Preservative Icon

Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent microbial growth. By itself, it has a scent that is similar to that of a rose.

Very disliked
PreservativePreservative Icon
Learn more
Zinc Sulfate Antimicrobial, Astringent
Sulfate Icon

Zinc Sulfate is a type of sulfate.

Disliked by users
SulfateSulfate Icon
Learn more
Disodium EDTA

Disodium EDTA plays a role in making products more stable by aiding other preservatives.

Disliked by users
Learn more
Sodium Hyaluronate Humectant, Skin Conditioning
0 / 0 Hyaluronic Acid Icon

Sodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.

0 Com. / 0 Irr.
Loved by users
Hyaluronic AcidHyaluronic Acid Icon
Learn more

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Skin Conditioning, Solvent
Loved

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. Stay hydrated!

Learn more about Water
Humectant, Skin Conditioning, Skin Protecting
Loved

Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.

A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.

As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.

Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.

Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.

In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.

This ingredient is organic, colorless, odorless, and non-toxic.

Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.

Learn more about Glycerin
Buffering, Masking
Disliked

Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).

As an AHA, Citric Acid removes the top layer of skin cells from the newer layer of skin underneath. This helps skin to remove dark spots and even out skin tone.

If you spot Citric Acid near the end of an ingredient list, it's likely there as a pH adjuster rather than an active ingredient.

Read more about some other popular AHA's here:

Learn more about Citric Acid
Disliked

Disodium EDTA plays a role in making products more stable by aiding other preservatives.

It is a chelating agent, meaning it neutralizes metal ions that may be found in a product.

Disodium EDTA is a salt of edetic acid and is found to be safe in cosmetic ingredients.

Learn more about Disodium EDTA
Preservative
Very Disliked

Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent microbial growth. By itself, it has a scent that is similar to that of a rose.

It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.

Ingredient Ratings

Here's what our community thinks of the ingredients in these products.

When to use

19 Routines
68% use in am
32% use in pm
100% use every day
18 Routines
78% use in am
22% use in pm
89% use every day