Kiehl's Fast Release Wrinkle-Reducing 0.3% Retinol Night Serum Versus Isntree Hyper Vitamin C 23 Serum
Updated on July 12, 2023
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 Vitamin E
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, sensitive skin, reducing pores, scar healing and dark spots
Free From
They both do not contain any common allergens, oils, 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
Kiehl's Fast Release Wrinkle-Reducing 0.3% Retinol Night Serum 22 ingredients
Isntree Hyper Vitamin C 23 Serum 17 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
Kiehl's Fast Release Wrinkle-Reducing 0.3% Retinol Night Serum 22 ingredients
Isntree Hyper Vitamin C 23 Serum 17 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Ingredients Side-by-side
Water
Skin ConditioningGlycerin
Humectant
Propanediol
SolventButylene Glycol
Humectant
Glycereth-26
HumectantPanthenol
Skin Conditioning
1,2-Hexanediol
Skin ConditioningPolyglycerin-3
HumectantC12-14 Pareth-12
EmulsifyingPhenoxyethanol
Preservative
Caprylyl Glycol
EmollientAmmonium Acryloyldimethyltaurate/Vp Copolymer
Betaine
Humectant
Xanthan Gum
EmulsifyingEthylhexylglycerin
Skin ConditioningAdenosine
Skin Conditioning
Carbomer
Emulsion StabilisingGlyceryl Acrylate/Acrylic Acid Copolymer
HumectantTromethamine
BufferingGlycereth-25 PCA Isostearate
Emulsifying
T-Butyl Alcohol
Perfuming
Tocopherol
Antioxidant
Water, Glycerin, Propanediol, Butylene Glycol, Glycereth-26, Panthenol, 1,2-Hexanediol, Polyglycerin-3, C12-14 Pareth-12, Phenoxyethanol, Caprylyl Glycol, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Betaine, Xanthan Gum, Ethylhexylglycerin, Adenosine, Carbomer, Glyceryl Acrylate/Acrylic Acid Copolymer, Tromethamine, Glycereth-25 PCA Isostearate, T-Butyl Alcohol, Tocopherol
Water
Skin ConditioningAscorbic Acid 23%
Antioxidant
Propanediol
SolventBetaine
Humectant
1,2-Hexanediol
Skin ConditioningPolyglycerin-3
HumectantTromethamine
BufferingEthyl Ether
SolventHydroxyethyl Urea
HumectantBetula Platyphylla Japonica Juice
Skin ConditioningEthylhexylglycerin
Skin ConditioningAdenosine
Skin Conditioning
Disodium EDTA
Panthenol
Skin Conditioning
Gardenia Florida Fruit Extract
Skin ConditioningDextrin
AbsorbentTocopherol
Antioxidant
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 WaterPropanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.Â
It’s often used to:
Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.
Learn more about PropanediolPanthenol is a common ingredient that helps hydrate and soothe the skin. It is found naturally in our skin and hair.
There are two forms of panthenol: D and L.
D-panthenol is also known as dexpanthenol. Most cosmetics use dexpanthenol or a mixture of D and L-panthenol.
Panthenol is famous due to its ability to go deeper into the skin's layers. Using this ingredient has numerous pros (and no cons):
Like hyaluronic acid, panthenol is a humectant. Humectants are able to bind and hold large amounts of water to keep skin hydrated.
This ingredient works well for wound healing. It works by increasing tissue in the wound and helps close open wounds.
Once oxidized, panthenol converts to pantothenic acid. Panthothenic acid is found in all living cells.
This ingredient is also referred to as pro-vitamin B5.
Learn more about Panthenol1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.Â
It is a:
- Humectant, drawing moisture into the skin
- Emollient, helping to soften skin
- Solvent, dispersing and stabilizing formulas
- Preservative booster, enhancing the antimicrobial activity of other preservativesÂ
Polyglycerin-3 is a 3-unit glycerin polymer.
Like glycerin, this ingredient is a humectant. Humectants help hydrate your skin by drawing water to it.
Having moisturized skin helps improve the skin barrier. Your skin barrier helps protect against irritants and bacteria.
Learn more about Polyglycerin-3Betaine is a common humectant (a substance that promotes retention of moisture). It's known to be gentle on the skin and can help balance hydration.
This ingredient is best for improving hydration and soothing irritated skin. Studies also show it helps even out skin tone.
Fun fact: Betaine is naturally created in the skin and body. The kind found within cosmetic products can be either plant-derived or synthetic.
Learn more about BetaineEthylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.
You might see Ethylhexylglycerin often paired with other preservatives such as phenoxyethanol. Ethylhexylglycerin has been found to increase the effectiveness of these other preservatives.
Adenosine is in every living organism. It is one of four components in nucleic acids that helps store our DNA.
Adenosine has many benefits when used. These benefits include hydrating the skin, smoothing skin, and reducing wrinkles. Once applied, adenosine increases collagen production. It also helps with improving firmness and tissue repair.
Studies have found adenosine may also help with wound healing.
In skincare products, Adenosine is usually derived from yeast.
Learn more about AdenosineTromethamine helps balance the pH and improve the texture of a product. It is synthetically created.
As an emulsifier, Tromethamine prevents oil and water ingredients from separating. This helps stabilize the product and elongate a product's shelf life. Tromethamine also makes a product thicker.
Tromethamine helps balance the pH level of a product. Normal pH level of skin is slightly acidic (~4.75-5.5). The acidity of our skin is maintained by our glands and skin biome. Being slightly acidic allows our skin to create an "acid mantle". This acid mantle is a thin barrier that protects our skin from bacteria and contaminants.
Oral Tromethanmine is an anti-inflammatory drug but plays the role of masking, adding fragrance, and/or balancing pH in skincare.
1,3-Propanediol, 2-amino-2-(hydroxymethyl)-
Learn more about TromethamineTocopherol (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 TocopherolIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Kiehl's Fast Release Wrinkle-Reducing 0.3% Retinol Night Serum 22 ingredients
Isntree Hyper Vitamin C 23 Serum 17 ingredients
Reviews
Here's what our community thinks
Kiehl's Fast Release Wrinkle-Reducing 0.3% Retinol Night Serum 22 ingredients
Isntree Hyper Vitamin C 23 Serum 17 ingredients
I've reintroduced this powerful vitamin C serum back into my routine because my hyperpigmentation has re-emerged. After only a few weeks of use, the dark spots and uneven skin tone have already faded and are much less visible.
Gradually increasing the vitamin C concentration in my routine, I've tried various other serums before - this one is the most effective so far. I'm not sure if I should Show more
No irritation, no weird smell
I switched from Cosrx's Vitamin C 23 serum to this. I prefer this to Cosrx. It has no smell, no irritation and gentle to my skin. If you are a fan of Cosrx Vitamin C serum (but loathe the smell), you may want to try this too.
