111SKIN Y Theorem Repair Light Serum NAC Y²™ – Lightweight Antioxidant Recovery Serum (30 ml)

The 111SKIN Y Theorem Repair Light Serum NAC Y²™ is the lightweight counterpart to the original Repair Serum — a fast-absorbing antioxidant treatment that delivers Dr. Yannis Alexandrides’ NAC Y²™ complex in a featherlight texture preferred by combination, oily, and warmer-climate skin.

Who It Is For: Designed for combination, oily, normal, and post-procedure skin clients who want NAC Y²™ antioxidant defense in a lighter, faster-absorbing serum format. Suitable across most skin types.

Targets: oxidative damage, post-procedure recovery, environmental stress, dehydration, redness, premature aging, oilier complexions needing barrier support.

Key Benefits: Defends with the NAC Y²™ antioxidant complex in its lightest serum format. Fast-absorbing, weightless texture ideal for layering. Hydrates without congesting oily zones. Calms the look of redness and post-procedure stress. Pairs seamlessly with the Repair Day Cream Light, Black Diamond Emulsion, and all 111SKIN moisturizers.

The Le Petit Spa Standard: Our team at Le Petit Spa Charlotte recommends the Y Theorem Repair Light Serum to combination and oily-leaning clients recovering from microneedling and microcurrent treatments — medical-grade antioxidant defense without the weight of the original Repair Serum.

Step 1: Begin with cleansed skin, morning and evening.
Step 2: Dispense 2 to 3 drops onto fingertips.
Step 3: Press evenly into face, neck, and décolleté.
Step 4: Allow to fully absorb.
Step 5: Follow with your 111SKIN moisturizer.
Step 6: In the morning, finish with broad-spectrum SPF 30 or higher.

Use twice daily as the foundational treatment step of the Y Theorem regimen.

Key Ingredients

NAC Y²™ (N-Acetyl Cysteine complex): Dr. Yannis’ patented antioxidant blend.
Lightweight Hydrators: Multi-weight Hyaluronic Acid in a non-greasy base.
Niacinamide: Refines and balances.
Vitamin E: Antioxidant protection.
Centella Asiatica: Soothes the look of post-procedure stress.

Ingredient Note: Ingredients may change from time to time. Please refer to the product packaging for the most current and complete ingredient list before use.

Who is the Y Theorem Repair Light Serum for?
Combination, oily, normal, and post-procedure skin clients who want NAC Y²™ antioxidant defense in a lighter texture than the original Repair Serum.

How is it different from the Repair Serum?
The Light Serum is faster-absorbing and lighter, better suited to combination and oily skin or humid climates. Both deliver NAC Y²™ antioxidant defense.

How often should I use it?
Twice daily, morning and evening, after cleansing and before moisturizer.

Can I use it after microneedling?
Yes — it is part of the Repair line and is formulated for post-procedure use once your provider clears product application.

Is it safe for sensitive skin?
Yes — it is gentle and well-tolerated. Highly reactive skin should patch-test.

How long does the 30ml bottle last?
With twice-daily use, approximately 8 to 10 weeks.

We love that 111SKIN built two versions of the Repair Serum so every client gets the right texture. Our team at Le Petit Spa Charlotte reaches for the Light Serum on combination and oily-leaning clients recovering from microneedling and microcurrent — medical-grade antioxidant defense without the weight.