Shielding and treating the skin, the Protective Duo utilises our signature ingredient, NAC Y2, to protect and repair stressed skin. The Y Theorem Serum was designed and bottled as a result of witnessing significant healing responses post-surgery. Boosting collagen production, supporting cell regeneration and improving elasticity in the skin, the serum is ideal for those whose skin have faced any element of trauma or exposure. Complimented with the NAC Y2 Pollution Defence Booster, this complexion defence protects the skin from physical and blue light damage by combining a powerful complex of peptides and antioxidants. Together this fortifying duo helps to maintain a healthy complexion away from free radicals, inflammation and a weakened skin surface.


1 x NAC Y2 Pollution Defence Booster – 20ml

1 x Y Theorem Repair Serum – 30ml


The Reparative Collection is 111SKIN’s first line of products, developed as a healing serum by Dr Yannis Alexandrides in his clinic at 111 Harley St. Infused with NAC Y2, a complex that includes a trio of actives with enhanced antioxidant capabilities to accelerate the healing process, the focus of this collection is to repair and strengthen the skin. Expect to see a reduction of fine lines, redness and a fortified epidermal barrier. 

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Apply 2-3 pumps of the Y Theorem Serum, mixed with 2-3 drops of the NAC Y2 Pollution Defence Booster before pressing into the skin.