Perfect pairing
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In Stock
Complimentary Cryo Eye Mask & Rose Gold Eye Mask
When you spend £150 on 111SKIN.
2 eye masks. Adds to bag automatically.Enjoy 15% off On your first order with code FIRST15
Complimentary Samples Choose 2 free samples at checkout
Free UK Standard Delivery On all orders over £25
100% Satisfaction Guaranteed Not happy? Send it back for free
Revitalise the complexion with the 111Skin Y Theorem Concentrate, a seven-day skincare program delivering the power of the NAC Y² complex to help hydrate and renew the skin.
Ideal for use on damaged skin, the NAC Y² is at the heart of this powerful formula. The complex contains a potent antioxidant-rich combination of amino acid L-cysteine, aesculus hippocastrum extract and ascorbyl phosphate, a stable vitamin C derivative.
Renowned Harley Street plastic surgeon Dr Yannis first used this formula to heal the skin from trauma. Designed as an effective seven-day program, the treatment works to repair and rejuvenate damaged skin, reducing the appearance of fine lines and wrinkles, while boosting elasticity for a radiant, renewed complexion.
Key Benefits
- Formulated with NAC Y² complex
- Rich in antioxidants
- Helps reduce the appearance of fine lines and wrinkles
- Deeply hydrating
- Boosts skin’s elasticity
- Ideal for use on damaged skin
- Cruelty-free
SKU# UK300056706
£10
Unlimited Next day delivery for a year. Order before 4pm (Mon-Fri) and receive your order the next working day. (T&Cs apply)
STANDARD DELIVERY - £4
Free when you spend £25. Delivered in 4-6 working days
PRIORITY STANDARD DELIVERY - £4.5
Free when you spend £75. Order before 4pm. Delivered in 4-6 working days
NEXT DAY DELIVERY - £5
Order before 4pm.
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RETURNS
Buy with confidence thanks to Space NK’s 100% Satisfaction Guarantee
Unopened product can be returned for a full refund or exchange within 28 days of purchase with proof of
purchase.
Opened or used products that you are not completely satisfied with can be returned for an exchange within 28 days of
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4.4
11 Reviews
Summary of Customer Ratings & Reviews
tristan90
Reviews: 1
Recommends this product: Yes
Great
It's a great high end serum- very thought out and neatly made. It's a bit overpriced as there are other options at lower prices. It has a subtle odd smell that's also interesting, I can imagine someone not liking it but I find it refreshing. 111 skin is overall a great brand and I'd say all their products work quite well.
Best Use: Hydrating, Barrier Repair, Reduce Dullness, Uneven Skin Texture, Diminish Dark Circles, Breakouts & Acne, Treat Pigmentation / Dark Spots, Treat Redness, Reduce Puffiness, Minimise Fine Lines & Wrinkles, Visible Pores, Firming, Anti-Aging
Y
Reviews: 1
Recommends this product: Yes
Reduces redness and irritation
[This review was collected as part of a promotion.] Reduces redness and irritation! Wish I could use them every night as my night serum!
Originally posted on: 111SKIN.com
Brisa C.
Reviews: 1
the smell
i can’t explain what the smell is but i literally could not use it more than 3 days and while my skins was starting to look great the smell made me feel so nauseated.
Originally posted on: 111SKIN.com
Crista D.
Reviews: 1
Recommends this product: Yes
Amazing!
I used this from an Ipsy deal and let me tell you.. after using this twice it did amazing things for my dry skin. I used it for the 7 days and couldn’t wait to use it. This is amazing stuff and now I am hooked. My face is clearer, way softer and has helped with my dark spots. IN LOVE!!
Originally posted on: 111SKIN.com
Abby
Location: United States
Reviews: 1
Recommends this product: Yes
YES!!
I love this product! I did have to come to the reviews initially to make sure it was supposed to smell as it does. However, if that means we are getting the purest product I am all for it. I can tell my skin looks healthier and just has an overall glow. I have bought this a couple of times now and will continue to do so.
Originally posted on: 111SKIN.com