SkinCeuticals C E Ferulic With 15% L-Ascorbic Acid Versus Rationale #5 The Serum
Updated on May 01, 2025
Overview
What they are
These products are both reef safe serums. They have a total of 3 ingredients in common
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 harsh alcohols, parabens, silicones 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
SkinCeuticals C E Ferulic With 15% L-Ascorbic Acid 12 ingredients
Rationale #5 The Serum 55 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
SkinCeuticals C E Ferulic With 15% L-Ascorbic Acid 12 ingredients
Rationale #5 The Serum 55 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 Conditioning
Potassium Sorbate
Preservative
Glycine
Buffering
Serine
Masking
Glutamic Acid
Humectant
Aspartic Acid
Masking
Leucine
Skin ConditioningAlanine
MaskingLysine
Skin ConditioningArginine
Masking
Tyrosine
MaskingPhenylalanine
Masking
Proline
Skin ConditioningThreonine
Valine
MaskingIsoleucine
Skin ConditioningHistidine
Humectant
Limonene
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
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Ethoxydiglycol is a synthetic solvent.
Solvents are used to keep ingredients together in a product. They can help dissolve ingredients to stable bases or help evenly distribute ingredients throughout the product.
Ethoxydiglycol also helps deliver other key ingredients into the skin.
Learn more about EthoxydiglycolGlycerin 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 GlycerinWater. 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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When to use
SkinCeuticals C E Ferulic With 15% L-Ascorbic Acid 12 ingredients
Rationale #5 The Serum 55 ingredients
Reviews
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