Kiehl's Clearly Corrective Dark Spot Solution Versus Differin Dark Spot Correcting Serum 2% Hydroquinone
Updated on June 26, 2024
Overview
What they are
These products are both reef safe . They have a total of 5 ingredients in common
Suited For
They're both likely to be good for brightening skin, oily skin, reducing pores, scar healing and better texture
Free From
They both do not contain any parabens, silicones or sulfates
What's Inside
They both contain harsh alcohols, 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
Kiehl's Clearly Corrective Dark Spot Solution 24 ingredients
Differin Dark Spot Correcting Serum 2% Hydroquinone 14 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
Kiehl's Clearly Corrective Dark Spot Solution 24 ingredients
Differin Dark Spot Correcting Serum 2% Hydroquinone 14 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningPropylene Glycol
Humectant
Glycerin
Humectant
Alcohol Denat.
Antimicrobial
PEG/PPG/Polybutylene Glycol-8/5/3 Glycerin
HumectantHydroxypropyl Tetrahydropyrantriol
Skin Conditioning3-O-Ethyl Ascorbic Acid
Skin Conditioning
PPG-6-Decyltetradeceth-30
EmulsifyingPhenoxyethanol
Preservative
Salicylic Acid
Masking
Xanthan Gum
EmulsifyingHydroxyethylcellulose
Emulsion StabilisingPotassium Hydroxide
BufferingCitric Acid
Buffering
Sodium Citrate
BufferingTocopheryl Acetate
Antioxidant
Lavandula Angustifolia Oil
Masking
Disodium EDTA
Adenosine
Skin Conditioning
Linalool
Perfuming
Butylene Glycol
Humectant
Tocopherol
Antioxidant
Citrus Aurantium Tachibana Peel Extract
HumectantPaeonia Suffruticosa Root Extract
Skin ProtectingWater, Propylene Glycol, Glycerin, Alcohol Denat., PEG/PPG/Polybutylene Glycol-8/5/3 Glycerin, Hydroxypropyl Tetrahydropyrantriol, 3-O-Ethyl Ascorbic Acid, PPG-6-Decyltetradeceth-30, Phenoxyethanol, Salicylic Acid, Xanthan Gum, Hydroxyethylcellulose, Potassium Hydroxide, Citric Acid, Sodium Citrate, Tocopheryl Acetate, Lavandula Angustifolia Oil, Disodium EDTA, Adenosine, Linalool, Butylene Glycol, Tocopherol, Citrus Aurantium Tachibana Peel Extract, Paeonia Suffruticosa Root Extract
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 WaterAlcohol 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.Hydroxyethylcellulose is used to improve the texture of products. It is created from a chemical reaction involving ethylene oxide and alkali-cellulose. Cellulose is a sugar found in plant cell walls and help give plants structure.
This ingredient helps stabilize products by preventing ingredients from separating. It can also help thicken the texture of a product.
This ingredient can also be found in pill medicines to help our bodies digest other ingredients.
Learn more about HydroxyethylcelluloseCitric 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 AcidDisodium EDTA plays a role in making products more stable by aiding other preservatives.
It is a chelating agent, meaning it neutralizes metal ions that may be found in a product.
Disodium EDTA is a salt of edetic acid and is found to be safe in cosmetic ingredients.
Learn more about Disodium EDTAIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Kiehl's Clearly Corrective Dark Spot Solution 24 ingredients
Differin Dark Spot Correcting Serum 2% Hydroquinone 14 ingredients
Reviews
Here's what our community thinks
Kiehl's Clearly Corrective Dark Spot Solution 24 ingredients
Normally I avoid products with alcohol, but it’s not an issue with this one. It’s well formulated so that it’s balanced out with other more hydrating ingredients. It absorbed nearly immediately and doesn’t dry out the skin. The results aren’t massive. But I just love the apothecary aesthetic and it works about as well as any other dark spot corrector.
Works as said
I have dark skin and lots of PIH. It lightens them. You can see quicker results with new PIH spots. Holygrail in my routine
