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EUK 134.0 0.1%

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CLAIM TO FAME: A water-free, high-potency antioxidant formula for brighter, smoother, younger-looking skin

FAST FACTS: Features an extremely high 0.1% concentration of EUK 134, a mimetic of superoxide dismutase and catalase that forms an exceptionally rare self-regenerating molecule; fights free radicals, reactive oxygen species (ROS), and hydrogen peroxide (and after each antioxidant reaction, it regenerates itself so that it can undertake another antioxidant reaction); considered as one of the strongest antioxidants, it offers round-the-clock antioxidant support; best used once a day, in the AM, on its own or mixed with non-acidic formulations if desired; vegan formula is cruelty-free and doesn’t contain water, alcohol, oil, silicone, nut, gluten, and soy

PERFECT FOR: Minimizing visible redness and protecting against UV damage

January 5, 2018
”This product is a true gem! If I could I’d give it 20 stars. After literally three days I have been able to see visible results—glowing skin. Amazing!”

”I’ve been using it for about two months and must admit that it is one of the very few products I’ve tried that are true game changers. It gives me a healthy glow, radiance, even skin tone, less redness, and overall refreshed look. I am in love. Deciem, please don’t ever discontinue EUK.”

”For those having issue with consistency—I’m using 3-4 drops for my face and neck as the last serum, before creams and leave it for about 20 minutes before putting anything else on top.”
–MS (from theordinary.com)

WHAT YOU GET: (1) EUK 134.0 0.1%
INGREDIENTS: Propanediol, Ethylbisiminomethylguaiacol Manganese Chloride

Formulations are updated from time to time as part of The Ordinary’s commitment to innovation. As such, the ingredient list shown here may vary from the box of the product depending on time and region of purchase.

Apply alone or after water-based serums, before oils or heavier creams. Alternatively, mix with other treatments to enhance their antioxidant capacity significantly. Do not use with highly acidic formulations such as suspensions of ascorbic acid. Strong acids will completely destroy EUK 134, which is based on manganese.

The low price of this formula does not reflect EUK 134’s extremely high potency. EUK 134 is by far one of the strongest antioxidants available. While EUK 134 itself is very costly, the suggested concentration in any formula is below 0.05% and most formulas do not use this maximum suggestion. Our formula uses EUK 134 at an extremely high 0.1% concentration and we do not believe any product on the market today uses a higher concentration than this amount. This formula does not contain any water, silicones, oils, or alcohol. Water can impair the stability of any antioxidant.

The Ordinary’s antioxidant offering includes Resveratrol 3% + Ferulic Acid 3%. If you wish to take advantage of both formulas, either use them at different times or apply each in a separate step since acids and EUK 134 should not be mixed together. EUK 134 can also be mixed with most products such as Natural Moisturizing Factors + HA for a strong antioxidant boost.

The Ordinary

“Clinical formulations with integrity”—that’s what The Ordinary is about. Created to celebrate truth, veracity, and reliability, the beauty company is focused on advanced functional beauty while honestly communicating its products to its consumers. The end goal? Bringing to market effective, well-known technologies at reasonable prices. As part of DECIEM’s brands, The Ordinary is also free of Parabens, Sulphates, Mineral Oil, Methylchloroisothiazolinone, Methylisothiazolinone, Animal Oils, Benzalkonium Chloride, Coal Tar Dyes, Formaldehyde, Mercury, and Oxybenzone and does not test on animals. All you need is to try out one of their bestselling products, extremely affordable and effective skincare products and you’ll realize what makes The Ordinary, extraordinary.

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11 reviews

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4.1 out of 5
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1 star
Certified Buyer
  • Skin Type Combination
  • Skin Tone Medium
  • Facial Features Morena
  • Age 17


Hmmm, I bought this for my dad since I convinced him to do his skincare this quarantine, we have a lot of time in our hands now, so why not make it a time for rejuvenation and self-love? At first, I just put on him, and based on other reviews, it was supposed to feel warm on your face? He said it didn't even after a few tries, so I tried it out. It was warm and tingly and it ended up sensitizing my cheeks. Personally, I don't love it, it's just not for me. For my dad however, he really didn't say much, but I can see some positive results.

14 days ago
Certified Buyer
  • Skin Type Normal
  • Skin Tone Medium
  • Facial Features Chinita
  • Age 19


After just a few days of using this product, I noticed an extreme improvement in the texture of my skin. It feels much smoother! Also, I've noticed that the redness around my nose is not as bad as before and my skin looks more even. It also helps prevent incoming pimples and tones down acne scars, which I really used to struggle with. It also helped me gain a natural glow in my face. I don't even feel the need to use foundation and concealer now!

23 days ago
Top Reviewer
  • Skin Type Combination
  • Skin Tone Fair
  • Facial Features Morena
  • Age 25

It works!

I think this stuff works if you don’t use conflicting skincare products at the same time. I like that it reduces the redness on my skin after a full day outside. The only thing is that I find the consistency to be too oily and it takes a while for the skin to absorb it. However, the skin feels really nice and smooth the next day!!

about 1 month ago
Certified Buyer
  • Skin Type Combination
  • Skin Tone Medium
  • Facial Features Moreno
  • Age 19

Pretty good!

I didn't really know what EUK before I bough it but the results I saw surprised me. The biggest benefit, I would say, is it's able to stop incoming acne from forming and also, keeps the skin calm throughout the day. Although its consistency is in oil, it's also not that heavy! If you're sensitive, you might break out from this during the first week (like I did) but after, it clears those pimples up right away!

about 2 months ago
Top Reviewer
  • Skin Type Normal
  • Skin Tone Medium
  • Facial Features Morena
  • Age 54

Good product!

I have read the research on this product and its amazing how its effects include actually reversing skin cells damaged by sun exposure and fine lines caused from UV rays. It does sting a bit for 30minutes or more after putting on and is very oily to be able to apply sun screen on top of it easily. I will however continue to use it every alternate day to see positive effects on my skin

4 months ago
Top Reviewer
  • Skin Type Dry
  • Skin Tone Medium
  • Facial Features Mestiza
  • Age 24


Love this! I mix this with The Ordinary's NMF + HA and it works well with my skin. Didn't cause any breakouts or anything. The product itself feels warm on the face - but that's normal! I emailed Deciem to get them to help me with my TO routine since I have a ton of products and they gave me instructions and guidelines on when and how to use this.

5 months ago
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