BIOTHERM Life Plankton Elixir Anti-Aging Serum Versus CeraVe Skin Renewing Vitamin C Serum
Updated on February 03, 2025
Overview
What they are
These products are both reef safe serums. They have a total of 10 ingredients in common
Cool Features
They both contain hyaluronic acid, Vitamin C and Vitamin E
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, reducing pores, scar healing and better texture
Free From
They both do not contain any common allergens or parabens
What's Inside
They both contain harsh alcohols and 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
BIOTHERM Life Plankton Elixir Anti-Aging Serum 26 ingredients
CeraVe Skin Renewing Vitamin C Serum 26 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
BIOTHERM Life Plankton Elixir Anti-Aging Serum 26 ingredients
CeraVe Skin Renewing Vitamin C Serum 26 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningBifida Ferment Lysate
Skin Conditioning
Glycerin
Humectant
Alcohol Denat.
Antimicrobial
Dimethicone
Emollient
Hydroxyethylpiperazine Ethane Sulfonic Acid
BufferingPhenoxyethanol
Preservative
Octyldodecanol
EmollientSodium Hyaluronate
Humectant
Caprylyl Glycol
EmollientAmmonium Polyacryloyldimethyl Taurate
Emulsion StabilisingVitreoscilla Ferment
Skin ConditioningAscorbyl Glucoside
Antioxidant
Adenosine
Skin Conditioning
Xanthan Gum
EmulsifyingPEG-20 Methyl Glucose Sesquistearate
Emulsifying
Ethylenediamine
Pentylene Glycol
Skin ConditioningFaex Extract
Skin ConditioningSodium Hydroxide
BufferingSodium Benzoate
Masking
PEG-60 Hydrogenated Castor Oil
Emulsifying
Hydrolyzed Hyaluronic Acid
Humectant
Salicyloyl Phytosphingosine
Skin ConditioningTocopherol
Antioxidant
Parfum
Masking
Water, Bifida Ferment Lysate, Glycerin, Alcohol Denat., Dimethicone, Hydroxyethylpiperazine Ethane Sulfonic Acid, Phenoxyethanol, Octyldodecanol, Sodium Hyaluronate, Caprylyl Glycol, Ammonium Polyacryloyldimethyl Taurate, Vitreoscilla Ferment, Ascorbyl Glucoside, Adenosine, Xanthan Gum, PEG-20 Methyl Glucose Sesquistearate, Ethylenediamine, Pentylene Glycol, Faex Extract, Sodium Hydroxide, Sodium Benzoate, PEG-60 Hydrogenated Castor Oil, Hydrolyzed Hyaluronic Acid, Salicyloyl Phytosphingosine, Tocopherol, Parfum
Water
Skin ConditioningAscorbic Acid
Antioxidant
Glycerin
Humectant
Dimethicone
Emollient
Cetearyl Ethylhexanoate
Emollient
Alcohol Denat.
Antimicrobial
Sodium Hydroxide
BufferingAmmonium Polyacryloyldimethyl Taurate
Emulsion StabilisingPanthenol
Skin Conditioning
Ceramide NP
Skin Conditioning
Ceramide AP
Skin Conditioning
Ceramide EOP
Skin Conditioning
Carbomer
Emulsion StabilisingCetearyl Alcohol
Emollient
Behentrimonium Methosulfate
Sodium Hyaluronate
Humectant
Sodium Lauroyl Lactylate
EmulsifyingCholesterol
Emollient
Phenoxyethanol
Preservative
Tocopheryl Acetate
Antioxidant
Disodium EDTA
Isopropyl Myristate
Emollient
Caprylyl Glycol
EmollientXanthan Gum
EmulsifyingPhytosphingosine
Skin Conditioning
Ethylhexylglycerin
Skin ConditioningWater, Ascorbic Acid, Glycerin, Dimethicone, Cetearyl Ethylhexanoate, Alcohol Denat., Sodium Hydroxide, Ammonium Polyacryloyldimethyl Taurate, Panthenol, Ceramide NP, Ceramide AP, Ceramide EOP, Carbomer, Cetearyl Alcohol, Behentrimonium Methosulfate, Sodium Hyaluronate, Sodium Lauroyl Lactylate, Cholesterol, Phenoxyethanol, Tocopheryl Acetate, Disodium EDTA, Isopropyl Myristate, Caprylyl Glycol, Xanthan Gum, Phytosphingosine, Ethylhexylglycerin
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 WaterGlycerin 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 GlycerinAlcohol Denat. is an alcohol with a denaturant property. It is created by mixing ethanol with other additives.
This ingredient gets a bad rep because it is irritating and drying - mostly due to its astringent property. Astringents draw out natural oils in tissue, constricting pores and leaving your skin dried out.
However, alcohol denat. is not all that bad.
Due to its low molecular weight, alcohol denat. tends to evaporate quickly. One study on pig skin found half of applied alcohol evaporated in 10 seconds and less than 3% stayed on skin.
This also helps other ingredients become better absorbed upon application.
Studies are conflicted about whether this ingredient causes skin dehydration. One study from 2005 found adding emollients to propanol-based sanitizer decreased skin dryness and irritation. Another study found irritation only occurs if your skin is already damaged.
Small amounts of alcohol are generally tolerated by oily skin or people who live in humid environments.
The rule of thumb is if this alcohol is near the end of an ingredients list, it will probably not affect your skin much.
Also...
This ingredient has antimicrobial and solvent properties.
The antimicrobial property helps preserve products and increase their shelf life. As a solvent, it helps dissolve other ingredients.
Other types of astringent alcohols include:
Learn more about Alcohol Denat.Dimethicone is a type of synthetic silicone created from natural materials such as quartz.
What it does:
Dimethicone comes in different viscosities:
Depending on the viscosity, dimethicone has different properties.
Ingredients lists don't always show which type is used, so we recommend reaching out to the brand if you have questions about the viscosity.
This ingredient is unlikely to cause irritation because it does not get absorbed into skin. However, people with silicone allergies should be careful about using this ingredient.
Note: Dimethicone may contribute to pilling. This is because it is not oil or water soluble, so pilling may occur when layered with products. When mixed with heavy oils in a formula, the outcome is also quite greasy.
Learn more about DimethiconePhenoxyethanol 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.
Sodium 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 HyaluronateCaprylyl Glycol is a humectant and emollient, meaning it attracts and preserves moisture.
It is a common ingredient in many products, especially those designed to hydrate skin. The primary benefits are retaining moisture, skin softening, and promoting a healthy skin barrier.
Though Caprylyl Glycol is an alcohol derived from fatty acids, it is not the kind that can dry out skin.
This ingredient is also used as a preservative to extend the life of products. It has slight antimicrobial properties.
Learn more about Caprylyl GlycolAmmonium Polyacryloyldimethyl Taurate is a polymer made from ammonium salts. It helps add stability and texture to a product. This ingredient is stable over a wide pH range.
Due to its ability to absorb water, it can help thicken the texture of a product. As an emulsion stabilizer, this ingredient is stabilizes other ingredients to create a consistent texture.
According to a manufacturer, it helps create a "smooth, light and fresh" texture.
Learn more about Ammonium Polyacryloyldimethyl TaurateXanthan 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.
On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.
Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.
Learn more about Xanthan GumSodium 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.
In small amounts, sodium hydroxide is considered safe to use. However, large amounts may cause chemical burns due to its high alkaline.
Your skin has a natural pH and acid mantle. This acid mantle helps prevent harmful bacteria from breaking through. The acid mantle also helps keep your skin hydrated.
"Alkaline" refers to a high pH level. A low pH level would be considered acidic.
Learn more about Sodium HydroxideIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
BIOTHERM Life Plankton Elixir Anti-Aging Serum 26 ingredients
CeraVe Skin Renewing Vitamin C Serum 26 ingredients
Reviews
Here's what our community thinks
BIOTHERM Life Plankton Elixir Anti-Aging Serum 26 ingredients
CeraVe Skin Renewing Vitamin C Serum 26 ingredients
Did not work for me
I've been trying to find a good vitaminc c cream/serum to include in my routine and this was sadly not it.
I used for a few days and noticed a ton of new breakouts. This was the only new product I was using, so I stopped it and the breakouts stopped.
Product-wise, it feels nice on the skin, doesn't have a strong scent, and it absorbes really nice.
I like but don't love this serum. It feels nice on the skin, but I haven't noticed any big changes in the overall appearance of my skin with it. I'd give it four stars but they recently changed the packaging from an easy to use metal tube to a plastic tube with a funky lid that's hard to unscrew without taking the whole thing off and exposing the product to air unnecessarily. On the hunt for a new Show more
