Skin401 Salicylic Acid BHA Clarify Toner Versus Skin401 5% Azelaic Acid Serum
Updated on February 11, 2025
Overview
What they are
These products are both vegan, cruelty-free, and reef safe . They have a total of 12 ingredients in common
Suited For
They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing and dark spots
Free From
They both do not contain any parabens, silicones or sulfates
What's Inside
They both contain fragrances and oils
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
Skin401 Salicylic Acid BHA Clarify Toner 25 ingredients
Skin401 5% Azelaic Acid Serum 19 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
Skin401 Salicylic Acid BHA Clarify Toner 25 ingredients
Skin401 5% Azelaic Acid Serum 19 ingredients
Key Ingredients
Benefits
Concerns
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningNiacinamide
Smoothing
PPG-26-Buteth-26
Skin ConditioningGlycerin
Humectant
Salicylic Acid
Masking
Aloe Barbadensis Leaf Juice
Skin Conditioning
Panthenol
Skin Conditioning
Melaleuca Alternifolia Leaf Extract
Perfuming
Arctium Lappa Root Extract
Skin Conditioning
Lavandula Angustifolia Flower Extract
Cleansing
Achillea Millefolium Extract
CleansingArnica Montana Flower Extract
Masking
Nasturtium Officinale Flower/Leaf Extract
AntiseborrhoeicJuniperus Communis Fruit Extract
Perfuming
Benzyl Alcohol
Perfuming
Sodium Benzoate
Masking
Citric Acid
Buffering
Potassium Sorbate
Preservative
Propylene Glycol
Humectant
PEG-40 Hydrogenated Castor Oil
Emulsifying
Benzoic Acid
Masking
Phenoxyethanol
Preservative
Dehydroacetic Acid
Preservative
Tetrasodium EDTA
Ethylhexylglycerin
Skin ConditioningWater, Niacinamide, PPG-26-Buteth-26, Glycerin, Salicylic Acid, Aloe Barbadensis Leaf Juice, Panthenol, Melaleuca Alternifolia Leaf Extract, Arctium Lappa Root Extract, Lavandula Angustifolia Flower Extract, Achillea Millefolium Extract, Arnica Montana Flower Extract, Nasturtium Officinale Flower/Leaf Extract, Juniperus Communis Fruit Extract, Benzyl Alcohol, Sodium Benzoate, Citric Acid, Potassium Sorbate, Propylene Glycol, PEG-40 Hydrogenated Castor Oil, Benzoic Acid, Phenoxyethanol, Dehydroacetic Acid, Tetrasodium EDTA, Ethylhexylglycerin
Water
Skin ConditioningPropylene Glycol
Humectant
Azelaic Acid
Buffering
Panthenol
Skin Conditioning
Melaleuca Alternifolia Leaf Extract
Perfuming
Sodium Hyaluronate
Humectant
Glycyrrhiza Glabra Root Extract
Bleaching
Camellia Sinensis Leaf Extract
Antimicrobial
Hydroxyethylcellulose
Emulsion StabilisingGlycerin
Humectant
Sodium Benzoate
Masking
Allantoin
Skin Conditioning
Potassium Sorbate
Preservative
PEG-40 Hydrogenated Castor Oil
Emulsifying
Tetrasodium EDTA
Phenoxyethanol
Preservative
Benzoic Acid
Masking
Dehydroacetic Acid
Preservative
Sodium Hydroxide
BufferingWater, Propylene Glycol, Azelaic Acid, Panthenol, Melaleuca Alternifolia Leaf Extract, Sodium Hyaluronate, Glycyrrhiza Glabra Root Extract, Camellia Sinensis Leaf Extract, Hydroxyethylcellulose, Glycerin, Sodium Benzoate, Allantoin, Potassium Sorbate, PEG-40 Hydrogenated Castor Oil, Tetrasodium EDTA, Phenoxyethanol, Benzoic Acid, Dehydroacetic Acid, Sodium Hydroxide
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Benzoic Acid is used to preserve and adjust the pH of products.
The antimicrobial property of Benzoic Acid helps elongate a product's shelf life. Its main role is to reduce fungi growth and is not found to be effective at fighting bacteria. Therefore Benzoic Acid is always added along with other preservatives.
In its pure form, Benzoic Acid looks like a white crystalline solid. It has slight solubility in water.
The name of Benzoic Acid comes from gum benzoin, which used to be the sole source of deriving this ingredient. Benzoic Acid is the most simple aromatic carboxylic acid.
Benzoic Acid is naturally occuring in strawberries, mustard, cinnamon, and cloves. It has a slight scent but is not considered to be a fragrance.
Learn more about Benzoic AcidDehydroacetic Acid is fungicide and bactericide. It is used as a preservative in cosmetics. Preservatives help elongate the shelf life of a product.
Dehydroacetic Acid is not soluble in water.
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 GlycerinMelaleuca Alternifolia Leaf Extract comes from the Tea Tree, Melaleuca alternifolia, Myrtaceae. This tea tree is native to Australia.
Tea Leaf extract contains antimicrobial and anti-acne properties.
This ingredient has perfuming properties and contains linalool and limonene. These fragrance and terpinen components can cause skin sensitivity.
Learn more about the benefits of Tea Tree Oil here.
Learn more about Melaleuca Alternifolia Leaf ExtractPanthenol is a common ingredient that helps hydrate and soothe the skin. It is found naturally in our skin and hair.
There are two forms of panthenol: D and L.
D-panthenol is also known as dexpanthenol. Most cosmetics use dexpanthenol or a mixture of D and L-panthenol.
Panthenol is famous due to its ability to go deeper into the skin's layers. Using this ingredient has numerous pros (and no cons):
Like hyaluronic acid, panthenol is a humectant. Humectants are able to bind and hold large amounts of water to keep skin hydrated.
This ingredient works well for wound healing. It works by increasing tissue in the wound and helps close open wounds.
Once oxidized, panthenol converts to pantothenic acid. Panthothenic acid is found in all living cells.
This ingredient is also referred to as pro-vitamin B5.
Learn more about PanthenolPeg-40 Hydrogenated Castor Oil is derived from castor oil and polyethylene glycol (PEG). It is used as a emollient and emulsifier.
As an emulsifier, it helps prevent ingredients from separating. It also helps make the other ingredients more soluble; it is often used to solubilize fragrances. This increases spreadability and elongates shelf life in a product.
Emollients help soothe and soften the skin. They do this by creating a protective film on your skin. This barrier helps trap moisture and keeps your skin hydrated. Emollients may be effective at treating dry or itchy skin.
This ingredient may or may not be vegan, depending on the source.
Peg-40 Hydrogenated Castor Oil may not be fungal-acne safe. We recommend speaking with a professional if you have any questions or concerns.
Learn more about PEG-40 Hydrogenated Castor OilPhenoxyethanol 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.
Potassium Sorbate is a preservative used to prevent yeast and mold in products. It is commonly found in both cosmetic and food products.
This ingredient comes from potassium salt derived from sorbic acid. Sorbic acid is a natural antibiotic and effective against fungus.
Both potassium sorbate and sorbic acid can be found in baked goods, cheeses, dried meats, dried fruit, ice cream, pickles, wine, yogurt, and more.
You'll often find this ingredient used with other preservatives.
Learn more about Potassium SorbatePropylene Glycol is an odorless, colorless liquid. As a humectant, it helps skin retain moisture. It also aids in delivering active ingredients.
Another role of this ingredient is preventing a product from melting or freezing. Propylene glycol also adds antimicrobrial properties to a product, elongating product lifespan.
This ingredient is considered an organic alcohol and commonly added into both cosmetics and foods.
Those with sensitive skin or conditions may develop a rash when using this ingredient.
Learn more about Propylene GlycolSodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.
Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed.
Sodium benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase.
It is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods.
Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps.
We always recommend speaking with a professional, such as a dermatologist, if you have any concerns.
Learn more about Sodium BenzoateTetrasodium EDTA is the salt formed from neutralizing ethylenediamine tetraacetic acid with sodium hydroxide. It is a chelating agent and used to prevent metal ions from binding to other ingredients. This helps keep the product and ingredients stable.
Tetrasodium EDTA comes as a white solid and is soluble in water.
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 WaterIngredient Ratings
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