The Ordinary Product Conflicts

So apart from all the confusing names and layering, you also need to understand about The Ordinary product conflicts. I highly recommend you read through this page or the official Deciem Regimen Page so you understand which products can and can´t use together.

I have created a chart using the information given by Deciem on their regimen page. ONLY the products that have conflicts are mentioned here. If you use other brands, then you need to check their ingredients too.

On the official regimen page there are some conflicts that are missing from some of the products, but I think I have covered these in the charts below. If you spot any mistakes please let me know.

This chart is for guidance only. Always read instructions before using products and it is always recommended that you do a patch test.
Please link to this page, not just screenshot, because this page is regularly updated.
Click for printable version

What if my Ordinary products conflict?

If you have been using conflicting products, don´t panic, just stop using them together from now on and alternate then morning and evening or use on different days.

The Ordinary Acids

I asked Deciem about their wording “Strong Acids” and “Direct Acids”. Their reply was that they mean the same. Direct Acids are; AHA 30%, Azelaic Acid, Glycolic Acid, Lactic Acid 5 & 10%, Mandelic Acid, Salicylic Acid and Alpha Lipoic.

The Ordinary Peptides

Peptides are Buffet, Buffet + Copper, Matrixyl and Argireline. Buffet + Copper Peptides has a few more conflicts than the others. Always read the instructions and double check with Deciem if you’re unsure.

The Ordinary Vitamin C Products

When Deciem say “do not use with pure vitamin c”, this applies to most of the vitamin c products; Vitamin C 23% & 30%, Ascorbic Acid 8% + Alpha Arbutin 2%, Ethylated Ascorbic Acid 15% Solution, 100% L-Ascorbic Acid Powder.

The only vitamin c products that are conflict free are the Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F, Ascorbyl Glucoside Solution 12% and Magnesium Ascorbyl Phosphate 10%. If you find all these conflicts confusing, I would personally advise to start with one of these.

Other Conflicts & Conflicting Information

If you follow Deciem on Instagram, they will often suggest using Retinoids / Retinols, Acids and Vitamin Cs in different regimens due to irritation. There’s also conflicting information about Niacinamide and Vitamin C. The more you read on the internet the more confusing it will be with conflicting advice, but it´s important to read and learn. If you are an experienced skincare user then I’m sure you have done your own homework and know what’s best for your skin. For those of you who are new to skincare, it´s really down to you to decide whose advice to take. Personally, if I’m using Deciem products then I will take their advice. Remember, they do recommend patch testing and it´s good practice to patch test when you use 2 products in case of irritation.

The Ordinary Products & Conflicts

ProductsConflicts
Retinoid 2% other retinoid / retinol products
Retinoid 2% Squalane other retinoid / retinol products
Retinoid 5% Squalane other retinoid / retinol products
Retinol 0.2% Squalaneother retinoid / retinol products
Retinol 0.5% Squalaneother retinoid / retinol products
Retinol 1% Squalaneother retinoid / retinol products
Alpha LipoicDirect Acids
EUK 134 0.1%
(peptides)
Buffet | Buffet + Copper
Matrixyl | Argireline
EUK 134Highly Acidic Formulations of Ascorbic acid;
L´Ascorbic Acid | Ethylated Ascorbic Acid
Buffet + Copper Peptides
Resveratrol & Ferulic AcidBuffet + Copper Peptide
AHA 30%Direct Acids | EUK 134
Peptides
Buffet | Buffet + Copper
Matrixyl | Argireline
Azelaic AcidDirect Acids | EUK 134
Peptides |
Buffet | Buffet + Copper
Matrixyl | Argireline
Glycolic AcidDirect Acids | EUK 134
Buffet | Buffet + Copper
Matrixyl |Argireline
Lactic Acid 5%Direct Acids | EUK 134
Buffet | Buffet + Copper
Matrixyl | Argireline
Lactic Acid 10%Direct Acids | EUK 134
Buffet | Buffet + Copper
Matrixyl | Argireline
Salicylic AcidDirect Acids | EUK 134
Buffet | Buffet + Copper
Matrixyl | Argireline
Salicylic Acid MasqueDirect Acids | EUK 134
Buffet | Buffet + Copper
Matrixyl | Argireline
Mandelic AcidDirect Acids | EUK 134
Buffet | Buffet + Copper
Matrixyl | Argireline
L ´Ascorbic Acid PowderNiacinamide | EUK 134
Buffet | Buffet + Copper, Matrixyl |Argireline | The Acids |
Vitamin C Suspension 23%Niacinamide | EUK 134 | Buffet | Buffet + Copper | Matrixyl | Argireline
Vitamin C Suspension 30%Niacinamide | EUK 134 | Buffet | Buffet + Copper | Matrixyl | Argireline
Ethylated Ascorbic AcidNiacinamide | EUK 134
Buffet | Buffet + Copper
Argireline |Matrixyl
Ascorbic Acid + Alpha ArbutinNiacinamide + EUK 134 | Buffet | Buffet + Copper | Matrixyl | Argireline
NiacinamidePure Vit C, Ethylated Ascorbic Acid, L´Ascorbic Acid Powder | Vit C 23% & 30% | ELAA Ethylated Ascorbic Acid | Ascorbic Acid + Alpha Arbutin (there is conflicting information about using Niacinamide and Vit C, so please do your own research)
BuffetDirect Acids | Pure Vit C products including L ´Ascorbic Acid & Ethylated Ascorbic Acid | Vitamin C 23% & 30% | Ascorbic Acid + Alpha Arbutin
Buffet + CopperDirect Acids | Pure Vit C products including L´Ascorbic Acid | Ethylated Ascorbic Acid |Vitamin C 23% & 30% | Ascorbic Acid + Alpha Arbutin
EUK 134 | Alpha Lipoic Acid | Resveratrol + Ferulic Acid
ArgirelineDirect Acids | Pure Vit C proucts including L ´Ascorbic Acid | Vitamin C 23% & 30% | Ascorbic Acid + Alpha Arbutin | Ethylated Ascorbic Acid
MatrixylDirect Acids | Pure Vit C products including L ´Ascorbic Acid | Ethylated Ascorbic Acid | Vitamin C 23% & 30% | Ascorbic Acid + Alpha Arbutin
The Ordinary Conflicts
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