Versus

COSRX AC Collection Ultimate Spot Cream Versus La Roche-Posay EFFACLAR K+

Facial Treatment
General Moisturizer
Korean Brand South Korea
French Brand France

Overview

Suited For

They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, oily skin and scar healing

Free From

They both do not contain any harsh alcohols, common allergens, parabens or sulfates

What's Inside

They both contain fragrances 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

Click any item below to learn more and see relevant ingredients

About this product

About this product

At a glance

Click on any of the items below to learn more

Benefits

Concerns

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

found in both products

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Humectant, Masking, Skin Conditioning

Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:

  • It is a solvent, meaning that it helps to dissolve other ingredients. This also enhances the absorption of the product into one's skin.
  • It is a humectant, which means that it helps attract moisture into the skin.
  • It helps improve product application.
  • It has mild preservative properties.

Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.

Emollient, Skin Conditioning, Skin Protecting

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 Dimethicone
Emulsifying, Emulsion Stabilising, Gel Forming

Xanthan 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 Gum

When to use

52 Routines
29% use in am
71% use in pm
77% use every day
When to use See routines that use it ->
273 Routines
44% use in am
56% use in pm
89% use every day
When to use See routines that use it ->

Reviews

Here's what our community thinks

COSRX AC Collection Ultimate Spot Cream 24 ingredients

2.0 /5
from 1 rating
Broke Me Out (1) Doesn't Work (1)
Justmia's avatar

Mia 🤍

7 months ago
Review

Doesn't do much and it broke me out also I don't get the texture of this for a spot treatment

#broke me out
#doesn't work

La Roche-Posay EFFACLAR K+ 24 ingredients

3.0 /5
from 3 ratings
KaterinaLaskaraki_411's avatar
Review

i dont see a change on my skin. it is still oily with black spots. I use this product since a year ago but Im dissapointed.