Paula's Choice C15 Super Booster Versus La Roche-Posay Vitamin C12 Serum - UK
Updated on March 22, 2025
Overview
What they are
These products are both reef safe serums. They have a total of 7 ingredients in common
Cool Features
They both contain hyaluronic acid, peptides, Vitamin C and Vitamin E
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, sensitive skin, reducing pores, scar healing, dark spots and better texture
Free From
They both do not contain any common allergens, parabens or sulfates
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
Paula's Choice C15 Super Booster 25 ingredients
La Roche-Posay Vitamin C12 Serum 30 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
Paula's Choice C15 Super Booster 25 ingredients
La Roche-Posay Vitamin C12 Serum 30 ingredients
Key Ingredients
Benefits
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningAscorbic Acid
Antioxidant
Glycerin
Humectant
Ethoxydiglycol
HumectantPPG-26-Buteth-26
Skin ConditioningMannitol
Humectant
Tridecapeptide-1
Skin Conditioning
Palmitoyl Tripeptide-5
Skin Conditioning
Ergothioneine
Antioxidant
Sodium Hyaluronate
Humectant
Pentylene Glycol
Skin ConditioningPEG-40 Hydrogenated Castor Oil
Emulsifying
Bisabolol
Masking
Sodium Gluconate
Skin ConditioningDecylene Glycol
Skin ConditioningFerulic Acid
Antimicrobial
Oryza Sativa Bran Extract
Skin Conditioning
Tocopherol
Antioxidant
Polyacrylate Crosspolymer-6
Emulsion Stabilising1,2-Hexanediol
Skin Conditioning
Panthenol
Skin Conditioning
Sodium Phytate
Sodium Hydroxide
BufferingCitric Acid
Buffering
Phenoxyethanol
Preservative
Water, Ascorbic Acid, Glycerin, Ethoxydiglycol, PPG-26-Buteth-26, Mannitol, Tridecapeptide-1, Palmitoyl Tripeptide-5, Ergothioneine, Sodium Hyaluronate, Pentylene Glycol, PEG-40 Hydrogenated Castor Oil, Bisabolol, Sodium Gluconate, Decylene Glycol, Ferulic Acid, Oryza Sativa Bran Extract, Tocopherol, Polyacrylate Crosspolymer-6, 1,2-Hexanediol, Panthenol, Sodium Phytate, Sodium Hydroxide, Citric Acid, Phenoxyethanol
Water
Skin ConditioningAscorbic Acid
Antioxidant
Dimethicone
Emollient
Glycerin
Humectant
Alcohol Denat.
Antimicrobial
Potassium Hydroxide
BufferingPolysilicone-11
Silica
Abrasive
Pentaerythrityl Tetraethylhexanoate
Emollient
PEG-20 Methyl Glucose Sesquistearate
Emulsifying
Sodium Hyaluronate
Humectant
Adenosine
Skin Conditioning
Poloxamer 338
EmulsifyingAmmonium Polyacryloyldimethyl Taurate
Emulsion StabilisingHydrolyzed Hyaluronic Acid
Humectant
Caprylic/Capric Triglyceride
Masking
Caprylyl Glycol
EmollientCitric Acid
Buffering
Laureth-7
EmulsifyingTrisodium Ethylenediamine Disuccinate
Bis-PEG/PPG-16/16 PEG/PPG-16/16 Dimethicone
Emollient
Acetyl Dipeptide-1 Cetyl Ester
Skin Conditioning
Xanthan Gum
EmulsifyingPentylene Glycol
Skin ConditioningPolyacrylamide
C13-16 Isoparaffin
Solvent
Tocopherol
Antioxidant
Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate
Antioxidant
Salicylic Acid
Masking
Parfum
Masking
Water, Ascorbic Acid, Dimethicone, Glycerin, Alcohol Denat., Potassium Hydroxide, Polysilicone-11, Silica, Pentaerythrityl Tetraethylhexanoate, PEG-20 Methyl Glucose Sesquistearate, Sodium Hyaluronate, Adenosine, Poloxamer 338, Ammonium Polyacryloyldimethyl Taurate, Hydrolyzed Hyaluronic Acid, Caprylic/Capric Triglyceride, Caprylyl Glycol, Citric Acid, Laureth-7, Trisodium Ethylenediamine Disuccinate, Bis-PEG/PPG-16/16 PEG/PPG-16/16 Dimethicone, Acetyl Dipeptide-1 Cetyl Ester, Xanthan Gum, Pentylene Glycol, Polyacrylamide, C13-16 Isoparaffin, Tocopherol, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Salicylic Acid, Parfum
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Ascorbic Acid is is pure Vitamin C. This form makes up the largest amount of vitamin C found naturally in our skin.
Not only is vitamin C great for your overall health and immune system, it also has plenty of benefits on your skin.
Vitamin C is best used for brightening skin. It improves dark spots, acne scars, and hyperpigmentation. This is because it blocks the process of skin darkening when exposed to UV.
Remember: Vitamin C should not replace sunscreen!
Your skin uses vitamin C to build collagen. Collagen is one key component in having a strong skin barrier and plump skin. Vitamin C also plays a role in regulating collagen, thus making it effective in improving wrinkles and fine lines.
Ascorbic acid shows potent antioxidant activity. As an antioxidant, it helps fight free-radicals. Free-radicals are molecules that may damage your skin cells. These antioxidants also protect skin against UV damage.
The best formulations include Vitamin E and/or ferulic acid. These two ingredients help stabilize and provide a boost in the benefits of ascorbic acid. This is because ascorbic acid becomes unstable when exposed to UV and air. In fact, you can tell your ascorbic acid has oxidized when it turns an orange-yellow color.
Ascorbic acid is generally compatible with other ingredients. However, using ascorbic acid with other active ingredients might cause irritation. Two ingredients: copper ions and benzoyl peroxide, will inactivate ascorbic acid completely.
Read more about other types of Vitamin C:
Foods rich with vitamin C include oranges, strawberries, broccoli, bell peppers, and more. When consuming Vitamin C, your skin receives a portion of the nutrients.
Learn more about Ascorbic AcidCitric 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 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 GlycerinPentylene 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.
The hydrophilic trait of Pentylene Glycol makes it a humectant. As a humectant, Pentylene Glycol helps draw moisture from the air to your skin. This can help keep your skin hydrated.
This property also makes Pentylene Glycol a great texture enhancer. It can also help thicken or stabilize a product.
Pentylene Glycol also acts as a mild preservative and helps to keep a product microbe-free.
Some people may experience mild eye and skin irritation from Pentylene Glycol. We always recommend speaking with a professional about using this ingredient in your routine.
Pentylene Glycol has a low molecular weight and is part of the 1,2-glycol family.
Learn more about Pentylene GlycolSodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.
Like hyaluronic acid, it is great at holding water and acts as a humectant. This makes it a great skin hydrating ingredient.
Sodium Hyaluronate is naturally occurring in our bodies and is mostly found in eye fluid and joints.
These are some other common types of Hyaluronic Acid:
Learn more about Sodium HyaluronateTocopherol (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.
Vitamin E also helps keep your natural skin lipids healthy. Your lipid skin barrier naturally consists of lipids, ceramides, and fatty acids. Vitamin E offers extra protection for your skin’s lipid barrier, keeping your skin healthy and nourished.
Another benefit is a bit of UV protection. Vitamin E helps reduce the damage caused by UVB rays. (It should not replace your sunscreen). Combining it with Vitamin C can decrease sunburned cells and hyperpigmentation after UV exposure.
You might have noticed Vitamin E + C often paired together. This is because it is great at stabilizing Vitamin C. Using the two together helps increase the effectiveness of both ingredients.
There are often claims that Vitamin E can reduce/prevent scarring, but these claims haven't been confirmed by scientific research.
Learn more about TocopherolWater. 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
Here's what our community thinks of the ingredients in these products.
When to use
Paula's Choice C15 Super Booster 25 ingredients
La Roche-Posay Vitamin C12 Serum 30 ingredients
Reviews
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