The Ordinary Products that should not be mixed are listed in the guide.

You can and cannot mix The Ordinary Products.It can be very confusing if you are new to The Ordinary.There is a simple chart with all The Ordinary Products.

It means not to use them in the same routine when products conflict.Why?They could cause irritation to your skin.You can use them on alternate days.You have to keep a record of the products you use and how your skin looks.

Please link to this page as it is regularly updated.Before using test products, read the instructions.

There isn't an official conflicts guide for Hylamide.The guide is based on ingredients and information on social media.Conflict information is often updated, so double-check with Deciem.

This one is confusing.The products were in the same regimen.Deciem said to not use them together in 2020.On the other day, they posted a story of these 2 products again.If you have used them together without irritation, you can continue.

The formation of a salt complex that has the potential to reduce the integrity of both is what we don't recommend.If you want to combine both products into a regimen, we recommend using them on alternate days and nights.

If you want to incorporate multiple vitamins into your regimen, we recommend using them on alternate evenings and waiting until your skin has adjusted to one before introducing another.

Due to the subjectivity of skin tolerance, we don't recommend combining this with other direct acids in the same regimen.The high concentration of salicylic acid in the formula may increase the sensitivity of the skin.We recommend that you perform a patch test of the combination before applying it to your face.

The deamination and oxidation processes that occur at a low pH compromise the activity of the peptides.Our recommendations are meant to serve as a preventative measure to avoid incompatibility between those combinations due to various concentrations and formats offered within our range and also because skin tolerance is subjective.The combination will not harm the skin if you continue to combine them.

We don't recommend combining direct acids with peptides because of their susceptibility to hydrolysis, which reduces their efficacy and makes them into individual amino acids.The deamination and oxidation processes that occur at low pH compromise the activity of the peptides.If you have previously combined peptides with acids and have not experienced any negative side effects, you may continue to do so.Our recommendations are meant to prevent incompatibility between those combinations and also because skin tolerance is subjective.

Our rule against combining strong antioxidants only applies to our products.We don't recommend combining direct acids with peptides because of their susceptibility to hydrolysis, which makes them into individual amino acids.The deamidation and oxidation processes that occur at low pH compromise the activity of the peptides.

If you have previously combined peptides with acids and have not experienced any negative side effects, you may continue to do so.Our recommendations are meant to prevent incompatibility between those combinations and also because skin tolerance is subjective.Hope this helps!

Our contraindication is specific to our products.If the combination has worked for you in the past, you may continue to use it.

You will find more conflicting information if you read more on the internet.I would advise you to follow the advice given by Deciem if you are new to skincare.

If you have an allergic reaction, patch test products before using them.This is where you can read how to patch test.

I hope it's all a little clearer after reading about all the conflicts.

Have a look at all of them.They will give you a good idea of what to use.