The Ordinary EUK 134 0.1% 30ml
The Ordinary EUK 134 0.1% is a potent antioxidant serum that defends against oxidative stress for a calmer, more resilient-looking skin.
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High-strength antioxidant shields skin from environmental aggressors
Helps visibly reduce redness and reactivity over time
Supports a smoother, more even-toned complexion
Lightweight, water-free formula layers well under moisturizer
Budget-friendly way to boost a protective skincare routine
The Ordinary EUK 134 0.1% is a potent antioxidant serum that defends against oxidative stress for a calmer, more resilient-looking skin.
A simple daily ritual
- 1
AM or PM, apply a small amount to clean, dry skin after watery serums.
- 2
Allow to absorb, then follow with moisturizer.
- 3
Use sunscreen in the morning.
- 4
Do not combine in the same routine with strong acids, pure vitamin C (L‑ascorbic acid), or copper peptides to maintain efficacy.
More information
EUK 134 (Ethylbisiminomethylguaiacol Manganese Chloride), Propanediol, Water-free base
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What customers are saying
- · Oct 20, 2025
Great Antioxidant
I can’t quite place what it is about this product, but it’s wonderful. My skin just seems happier when I use it. I apply a few drops a few times per week so a bottle lasts quite a long time. Excellent value.
— KatLam - · Dec 29, 2022
I really want...
I really want to like this product....I love the way my skin looks after it has absorbed but after a few hours, my skin starts to feel tight. and dry. Constantly refreshing my face throughout the day with a hydrating spray. I'm using it the morning only, and following up with a moisturizer and sunscreen. No acids before hand.Day 1 I was able to get the afternoon before feeling dry. Day 2 I couldn't get until noon.I'm going to try to use less or perhaps alternate every other day and see if that helps.. DECIEM Response: Thank you for your honest review on EUK 134 0.1%. We're so sorry to hear you're not completely satisfied. You may wish to try mixing 1-2 drops of EUK into your moisturizer…
— MC - · Jun 29, 2022Verified Buyer
I have been...
I have been using this product for the last week or two and have already noticed a big difference in my skin! I have a lot of redness in my face as well as acne scars from when I was younger. After using this every morning, the amount of redness in my face has drastically increased as well as the amount of oil I produce. My skin looks a lot smoother and I feel more confident to go makeup free. I would 100% recommend this to anyone looking to reduce facial redness and/or to heal old, stubborn acne scars.
— AS - · Feb 27, 2021Verified Buyer
I can't for...
I can't for sure that this is the product that has made my skin smooth, clear, and even toned. But I can say that this combined with other ordinary products have made a huge difference. I have acne prone, combination skin. I started using Niacinimide, azelaic acid, rose hip seed oil, and the retiniod, but it was not until I added the EUk into my routine that my skin became so soft and clear. All the products helped, but once I added this I have been able to go makeup free for the first time in years. It feels so good. I love the ordinary.
— CG
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