EUK 134 0.1%

The Ordinary EUK 134 0.1% is one of the more unusual antioxidants in skincare. EUK 134 mimics two of the body's own protective enzymes and — rarely for an antioxidant — regenerates itself as it works. In practice, this evening serum is for visible redness and defending skin against the look of UV damage.

What it actually does

• Calms visible redness. The brand states the formula has been shown to reduce redness you can see.
• Defends against the look of UV damage, adding an antioxidant layer to a routine (never a replacement for sunscreen).
• Self-regenerating antioxidant. Per the brand, EUK 134 mimics superoxide dismutase and catalase — it scavenges superoxide free radicals, breaks down hydrogen peroxide, and converts reactive oxygen species into water and oxygen, renewing itself in the process.
• Supports firmness concerns. Loss of firmness and elasticity is listed among its target concerns, alongside redness, for all skin types.
• A clean ingredient list. Free of sulfates, parabens, formaldehydes and formaldehyde-releasers, phthalates, mineral oil, oxybenzone, hydroquinone and more — plus vegan, cruelty-free and gluten-free.

How to use

1. Evenings. Apply a small amount to the face as part of your PM routine.
2. Order matters: after your water-based serums, before heavier treatments.
3. Keep retinoids separate. The brand instructs not to combine it with retinoid treatments.
4. Protect by day. Avoid unprotected sun exposure, and store the bottle somewhere cool and dry.

Is it right for you?

Questions

What exactly is EUK 134?

It's a lab-made molecule that imitates superoxide dismutase and catalase, two antioxidant enzymes skin produces naturally. What makes it rare, per the brand, is that it regenerates itself: after neutralising free radicals and hydrogen peroxide, it's ready to work again rather than being used up.

Can I use it with retinol?

Not in the same routine — the brand's directions say not to pair it with retinoid treatments. If you use retinol, alternate nights between the two.

Where does it go in my routine?

Evening, after your water-based serums but before anything heavier like creams or oils. A small amount covers the face.

Does it replace sunscreen?

No. It helps protect against the appearance of UV damage as an antioxidant, but the brand's own guidance is to avoid unprotected sun exposure — keep wearing SPF daily.

How long does delivery take?

Delivery takes 3 to 21 working days, depending on availability. In-stock items arrive sooner; ordered-in items take longer.

How can I pay?

Credit card, debit card, Instapay and mobile wallets — no cash on delivery.

What's the return policy?

Returns are accepted for defective, damaged or expired items only, reported within 1 day of delivery. Refunds are issued to the original payment method within 15–30 days.