No Surprises at Checkout No additional charges or VAT
Complimentary Samples Choose 2 free samples at checkout
Free Delivery When you spend over €50
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.
- 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
TRACKED DELIVERY €5
Free when you spend €50 Receive your order in 5-7 working days.
EXPRESS DELIVERY €9
Free when you spend €120 Receive your order in 1-2 working days.
CLICK & COLLECT - FREE
Collect your order from one of our stores within 3-5 working days.
EXPRESS CLICK & COLLECT - FREE
Collect your order from one of our stores within 1 hour. Subject to stock availability.
We ship worldwide! Find out more here for shipping or here for 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 purchase with proof of purchase.
Summary of Customer Ratings & Reviews
Skin Type:: Dry
Didn't do much
I am a huge fan of 111 Skin specially their face masks which I think are amazing. Having used their Y Theorem Repair Serum for a long time together with their Y Theorem Day and night creams I was expecting this ampoules to be a bit like a pick me up, intense treatment. I didn’t expect a miracle but to see some instant effects and that didn’t happen . They didn’t do more than my usual 111 Skin Products and I honestly didn’t see much difference in radiance or else. Won’t buy again.