Back to Explore | Apotheek Sarah Croux / Prescription / Cortisonezalf

Apotheek Sarah Croux Cortisonezalf

Name: Cortisonezalf
Brand: Apotheek Sarah Croux

A prescription with 3 ingredients.

Save

Overview

What it is

Prescription with 3 ingredients

Cool Features

It is cruelty-free, fungal acne (malassezia) safe, and reef safe

Free From

It doesn't contain any harsh alcohols, common allergens, fragrances, oils, parabens, silicones or sulfates

Fun facts

Apotheek Sarah Croux is from Belgium.

We independently verify ingredients and our claims are backed by peer-reviewed research. Does this product need an update? Let us know.

What's inside

Ingredients List

Hydrocortisone

Ketoconazole

Ceteareth-20

Cleansing

2 / 3

Hydrocortisone, Ketoconazole, Ceteareth-20

Ingredients Explained

Hydrocortisone

Hydrocortisone is the name for the hormone cortisol when used in medication.

It is medication and not technically a cosmetic ingredient. Most countries allow topical creams to contain up between 0.05 - 2.5% (depending on the country) of hydrocortisone without a prescription. Higher amounts usually require a prescription from a professional.

Hydrocortisone can help relieve rashes, eczema, itching, and other inflammation induced skin conditions.

We recommend speaking with a professional about using this ingredient.

Learn more about Hydrocortisone

Ketoconazole

This is not an INCI ingredient.

Ketoconazole is a pharmaceutical ingredient used to treat fungal infections. It is best to speak with a medical professional about using this ingredient.

Ceteareth-20

Cleansing, Emulsifying, Surfactant

Ceteareth-20 is an emulsifier and surfactant made by reacting cetearyl alcohol with 20 moles of ethylene oxide.

This gives it both oil and water-loving properties that makes it an effect emulsifier; it's really great at pulling oil droplets into water to create a stable, creamy, and easy-to-spread base.

Typical use ranges from 0.5-30%. Most leave-on products are in the 1-10% zone.

The 20 ethylene oxide units is well above the PEG-10 threshold and therefore not a food source for Malassezia (it's fungal acne safe).

This ingredient has a comedogenic rating of 2 and an irritancy rating of 3. These numbers come from testing the raw ingredient on rabbit ears and doesn't reflect how it will behave in a finished product.

In practice, this ingredient is a well-tolerated ingredient. The ratings reflect cautious lab conditions and not real-world use. Just be sure to patch test any formulas you feel unsure about.

Learn more about Ceteareth-20