Rationale #5 The Serum Versus La Roche-Posay 10% Pure Vitamin C Serum
Updated on March 21, 2024
Overview
What they are
These products are both reef safe serums. They have a total of 3 ingredients in common
Cool Features
They both contain BHA
Suited For
They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, oily skin, reducing pores, scar healing, dark spots and better texture
Free From
They both do not contain any parabens or sulfates
What's Inside
They both contain fragrances
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
Rationale #5 The Serum 55 ingredients
La Roche-Posay 10% Pure Vitamin C Serum 29 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
Rationale #5 The Serum 55 ingredients
La Roche-Posay 10% Pure Vitamin C Serum 29 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningEthoxydiglycol
HumectantVaccinium Myrtillus Fruit Extract
Skin ConditioningDimethyl Isosorbide
SolventSalicylic Acid
Masking
Lactic Acid
Buffering
Saccharum Officinarum Extract
MoisturisingGlycerin
Humectant
Citrus Aurantium Dulcis Fruit Extract
MaskingCitrus Limon Fruit Extract
Masking
Sodium Levulinate
Skin ConditioningAcer Saccharum Extract
Skin ConditioningDiutan Gum
Melaleuca Alternifolia Leaf
Abrasive
Sodium Anisate
AntimicrobialMentha Australis Leaf Extract
Skin ConditioningButylene Glycol
Humectant
Santalum Spicatum Seed Oil
Skin Conditioning
Citrus Aurantium Dulcis Oil
Masking
Citrus Aurantium Bergamia Leaf Oil
Astringent
Juniperus Mexicana Oil
Masking
Pelargonium Graveolens Oil
Masking
Citrus Aurantium Amara Flower Oil
Masking
Eugenia Caryophyllus Leaf Oil
Masking
Citrus Aurantium Bergamia Fruit Oil
Masking
Citrus Grandis Peel Oil
Masking
Citrus Limon Peel Oil
Masking
Litsea Cubeba Fruit Oil
Masking
Pentylene Glycol
Skin ConditioningMagnesium Aspartate
Skin ConditioningZinc Gluconate
Skin Conditioning
Citrus Australasica Fruit Extract
Antioxidant
Sodium Benzoate
Masking
Citric Acid
Buffering
Copper Gluconate
Skin ConditioningPotassium Sorbate
Preservative
Glycine
Buffering
Serine
MaskingGlutamic Acid
HumectantAspartic Acid
MaskingLeucine
Skin ConditioningAlanine
MaskingLysine
Skin ConditioningArginine
Masking
Tyrosine
MaskingPhenylalanine
MaskingProline
Skin ConditioningThreonine
Valine
MaskingIsoleucine
Skin ConditioningHistidine
HumectantLimonene
Perfuming
Citral
Perfuming
Linalool
Perfuming
Citronellol
Perfuming
Water, Ethoxydiglycol, Vaccinium Myrtillus Fruit Extract, Dimethyl Isosorbide, Salicylic Acid, Lactic Acid, Saccharum Officinarum Extract, Glycerin, Citrus Aurantium Dulcis Fruit Extract, Citrus Limon Fruit Extract, Sodium Levulinate, Acer Saccharum Extract, Diutan Gum, Melaleuca Alternifolia Leaf, Sodium Anisate, Mentha Australis Leaf Extract, Butylene Glycol, Santalum Spicatum Seed Oil, Citrus Aurantium Dulcis Oil, Citrus Aurantium Bergamia Leaf Oil, Juniperus Mexicana Oil, Pelargonium Graveolens Oil, Citrus Aurantium Amara Flower Oil, Eugenia Caryophyllus Leaf Oil, Citrus Aurantium Bergamia Fruit Oil, Citrus Grandis Peel Oil, Citrus Limon Peel Oil, Litsea Cubeba Fruit Oil, Pentylene Glycol, Magnesium Aspartate, Zinc Gluconate, Citrus Australasica Fruit Extract, Sodium Benzoate, Citric Acid, Copper Gluconate, Potassium Sorbate, Glycine, Serine, Glutamic Acid, Aspartic Acid, Leucine, Alanine, Lysine, Arginine, Tyrosine, Phenylalanine, Proline, Threonine, Valine, Isoleucine, Histidine, Limonene, Citral, Linalool, Citronellol
Water
Skin ConditioningAscorbic Acid
Antioxidant
Cyclohexasiloxane
Emollient
Glycerin
Humectant
Alcohol Denat.
Antimicrobial
Potassium Hydroxide
BufferingPolymethylsilsesquioxane
Polysilicone-11
Dimethicone
Emollient
Propylene Glycol
Humectant
Pentaerythrityl Tetraethylhexanoate
EmollientC13-14 Isoparaffin
Emollient
Tocopherol
Antioxidant
Sodium Hyaluronate
Humectant
Hydrolyzed Hyaluronic Acid
Humectant
Adenosine
Skin Conditioning
Acetyl Dipeptide-1 Cetyl Ester
Skin Conditioning
PEG-20 Methyl Glucose Sesquistearate
Emulsifying
Poloxamer 338
EmulsifyingSalicylic Acid
Masking
Polyacrylamide
Toluene Sulfonic Acid
Ammonium Polyacryloyldimethyl Taurate
Emulsion StabilisingXanthan Gum
EmulsifyingCaprylyl Glycol
EmollientDisodium EDTA
BHT
Antioxidant
Laureth-7
EmulsifyingParfum
Masking
Water, Ascorbic Acid, Cyclohexasiloxane, Glycerin, Alcohol Denat., Potassium Hydroxide, Polymethylsilsesquioxane, Polysilicone-11, Dimethicone, Propylene Glycol, Pentaerythrityl Tetraethylhexanoate, C13-14 Isoparaffin, Tocopherol, Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Adenosine, Acetyl Dipeptide-1 Cetyl Ester, PEG-20 Methyl Glucose Sesquistearate, Poloxamer 338, Salicylic Acid, Polyacrylamide, Toluene Sulfonic Acid, Ammonium Polyacryloyldimethyl Taurate, Xanthan Gum, Caprylyl Glycol, Disodium EDTA, BHT, Laureth-7, Parfum
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
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 WaterSalicylic Acid (also known as beta hydroxy acid or BHA) is one of the most well-known ingredients for treating skin that struggles with blackheads and acne. It helps to exfoliate both the skin's surface and pores, and also acts as an anti-inflammatory agent.
This multitasking property makes it a great ingredient for cleaning out pores, controlling oil production, and reducing inflammation.
Unlike AHAs which are water soluble, Salicylic Acid is oil soluble. This means that it's able to exfoliate the inside of pores and reduce blackheads.
Concentrations of 0.5-2% are recognized by the U.S. FDA as an over-the-counter topical acne product.
It can cause irritation and/or dryness if one's skin already has a compromised moisture barrier, so it's best to focus on repairing that before introducing a Salicylic Acid into your routine.
In general, Salicylic Acid is a great ingredient for oily acne-prone skin.
While salicylic acid does not increase sun-sensitivity, we still recommend wearing SPF.
If you are looking for the ingredient called BHA or Butylated Hydroxyanisole, click here.
Learn more about Salicylic AcidGlycerin 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 GlycerinIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Rationale #5 The Serum 55 ingredients
La Roche-Posay 10% Pure Vitamin C Serum 29 ingredients
Reviews
Here's what our community thinks
Rationale #5 The Serum 55 ingredients
La Roche-Posay 10% Pure Vitamin C Serum 29 ingredients
So far so good.
I have sensitive skin and this doesn't sting at all.
This was my first vitamin C serum
I started using this because I was curious about Vitamin C and wanted to experience its benefits. This is a really good and gentle Vitamin C serum for sensitive skin. Mine got used to it and now tolerates stronger products.
