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The Y Theorem Repair serum harnesses our unique NAC Y2 formula to protect and repair stressed skin, visibly reducing the appearance of fine lines and wrinkles.

This Repair Serum is the original product created by Dr. Alexandrides that inspired the 111SKIN range. The Repair Serum significantly boosts collagen production, supports cell regeneration and improves the elasticity of the skin. The result is instant hydration, effective volume enhancement, and a reduced appearance of fine lines and wrinkles.


Anti ageing serum builds volume, repairs and renews the skin.

Calendula extract heals and soothes the skin.

Amino acids improve skin elasticity.

Aminocaproic acid heals, prevents scarring, calms and soothes skin.

Excellent treatment for post-operative or laser treatments.


How To Use:

Massage Y Theorem Repair Serum sparingly onto the face and neck with a gentle patting motion. Apply the appropriate day or night cream on top of the serum.



NAC Y2 is broken down as N-acetylcysteine, Ascorbyl Phosphate and Aesculus Hippocastum Extract. This was originally formulated to help patients skin repair after trauma and applied for an accelerated healing time and more effective results. The N-acetyl derivative of amino acid L-cysteine is the precursor for glutathione, an important antioxidant which is produced by the body. Ascorbyl Phosphate is a stable Vitamin C derivative and antioxidant and Aesculus Hippocastum Extract is an active ingredient which is an antioxidant and vasoprotector.