Cocokind Postbiotic Acne Serum Versus COSRX The Niacinamide 15 Serum
Updated on March 21, 2025
Overview
What they are
These products are both cruelty-free and reef safe serums. They have a total of 4 ingredients in common
Cool Features
They both contain Vitamin E
Suited For
They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores and scar healing
Free From
They both do not contain any harsh alcohols, common allergens, fragrances, 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
Cocokind Postbiotic Acne Serum 24 ingredients
COSRX The Niacinamide 15 Serum 15 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
Cocokind Postbiotic Acne Serum 24 ingredients
COSRX The Niacinamide 15 Serum 15 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Ingredients Side-by-side
Salicylic Acid 1.5%
Masking
Aloe Barbadensis Leaf Juice
Skin Conditioning
Propanediol
Solvent
Glycerin
Humectant
Sodium Citrate
BufferingMusa Sapientum Fruit Extract
Skin ConditioningGluconolactone
Skin Conditioning
Lysolecithin
EmulsifyingSclerotium Gum
Emulsion StabilisingMaltodextrin
Absorbent
Sodium Benzoate
Masking
Sodium Hydroxide
BufferingPullulan
Xanthan Gum
EmulsifyingLactobacillus Ferment
Skin ConditioningTocopherol
Antioxidant
Silica
Abrasive
Helianthus Annuus Seed Oil
Emollient
Calcium Gluconate
HumectantBeta-Glucan
Skin Conditioning
1,2-Hexanediol
Skin Conditioning
Caprylyl Glycol
EmollientPyrus Malus Fruit Extract
Skin Conditioning
Morinda Citrifolia Fruit Extract
Skin ConditioningSalicylic Acid 1.5%, Aloe Barbadensis Leaf Juice, Propanediol, Glycerin, Sodium Citrate, Musa Sapientum Fruit Extract, Gluconolactone, Lysolecithin, Sclerotium Gum, Maltodextrin, Sodium Benzoate, Sodium Hydroxide, Pullulan, Xanthan Gum, Lactobacillus Ferment, Tocopherol, Silica, Helianthus Annuus Seed Oil, Calcium Gluconate, Beta-Glucan, 1,2-Hexanediol, Caprylyl Glycol, Pyrus Malus Fruit Extract, Morinda Citrifolia Fruit Extract
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Pullulan is a low viscosity polysaccharide (a long chain carbohydrate) with binding and film forming properties when dissolved in water. It is used to create a "silicone-like" or silky feel in cosmetics without adding viscosity.
According to a manufacturer, this ingredient's ability to easily dissolves makes it a great carrier for active ingredients.
Due to it being edible and tasteless, you'll likely find this ingredient in breath freshener strips. This ingredient is produced from the starch of the fungus, Aureobasidium pullulans.
Pullulan is stable over a broad-range of pH.
Learn more about PullulanXanthan 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 GumTocopherol (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 Tocopherol1,2-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
Ingredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Cocokind Postbiotic Acne Serum 24 ingredients
COSRX The Niacinamide 15 Serum 15 ingredients
Reviews
Here's what our community thinks
Cocokind Postbiotic Acne Serum 24 ingredients
COSRX The Niacinamide 15 Serum 15 ingredients
warning!!! this can be SO irritating *if you use it wrong*
do not use with
-ahas
-bhas
-vit c
-other niacinamide products
-start on dry skin first as wet skin absorbs more
tip: sandwich it. i put a little centella ampoule before and after this serum to prevent irritation. if used properly, this serum is a life changer! i struggle with closed comedones and acne scars and this helped Show more
HG acne scar serum
Initially, this serum had helped fade away most of my old acne scars. After while, I thought it didn't do anything more for my new acne growth. So I ditched this serum for about 3 months and tried other new niacinamide products. I REGRET it. Soon after, I got more and more whiteheads and acne. My skin texture becomes uneven and dry. The new acne scars couldn't fade away at all. Show more
