Y Theorem Repair Serum

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This Repair Serum is the hero product created by Dr. Alexandrides that inspired the 111SKIN range. Originally created to treat trauma after surgery, the restorative effects of the Repair Serum can aid in reducing redness and soothing irritated skin by providing it with reparative ingredients. Containing NAC Y2, the formula provides skin with the optimum conditions for enhanced collagen, elastin, and hyaluronic acid production. The result is a reduction in the appearance of fine lines and wrinkles, plumper looking skin, and a rejuvenated complexion. Rich in texture, only a small amount is required to nourish the skin, and it makes the perfect companion to take on holiday for use after exposure to extreme conditions or sun. It is also excellent for use on scarring.


Reduces the appearance of fine lines and wrinkles.
Repairs and protects stressed skin.
Soothes irritation
Apply one pump morning and evening, on clean, dry skin. Follow with 111SKIN


NAC Y2: A fusion of three ingredients that all improve antioxidant levels, providing the optimum environment for collagen and elastin production and reducing the effects of environmental damage.
NIACINAMIDE: A form of Vitamin B3 which restores important lipids in skin, while providing anti-inflammatory and brightening properties to combat uneven skin tone and blemishes.
CALENDULA: An anti-inflammatory botanical extract that stimulates healing and nourishes the skin.

Customer Reviews

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  • What’s the difference between this serum and the Black Diamond Serum? Which product is more suitable for over 40?

    It depends on your skin's needs. The Y Theorem Repair Serum will heal and soothe your skin, improve elasticity of it. Your skin will look more plumped and renewed. Also, this serum heals the skin if you have irritation or sensitive skin, but it is created especially for dry skin. The Celestial Black Diamond Serum is suitable for more mature skin and the advantage is that it delivers active ingredients deeper and quicker into the skin than the other serum. This serum will hydrate the skin and will reduce the fine lines and wrinkles. This serum is suitable for all skin types.

  • Can you use this around the eye area?

    For eye area we are recommending the Space Defence Bright Eye Lift Gel and the Celestial Black Diamond Eye Cream. The Y Theorem Repair Serum can be used on the face area.

  • Is this product good to reduce the appearance of existing scars? I had three stitches in my upper lip last Easter and am looking for a product to diminish the scar. I currently use rosehip oil.

    Yes, the existing scars can be reduced if they are not too old. In your case, I am sure it is going to help in order to reduce the appearance of it.

  • Is the product safe for pregnancy?

    Yes this product is fine for use during pregnancy. 

  • What is the difference between Y Theoreum repair serum and Y Theorum NAC Y2 serum

    There's no difference in the formulation it's just an evolution of naming of the products.

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