Dr. Dennis Gross Skincare Vitamin C Lactic 15% Vitamin C Firm & Bright Serum (30ml)

Vitamin C at full strength. Lactic Acid making it work harder.

The Vitamin C Lactic 15% Vitamin C Firm & Bright Serum is a high-performance brightening serum built around 15% L-Ascorbic Acid - one of the most potent and well-researched forms of Vitamin C available. Lactic Acid enhances absorption of the antioxidants, allowing them to penetrate more effectively and deliver a visible transformation in sun-aged skin. The result: dark spots fade, wrinkles smooth, skin firms, and dullness gives way to noticeably brighter, stronger-looking skin over time.

Formulated for normal to dry skin types looking for serious, long-term results on tone, texture, and firmness. 

Who's It For

Anyone dealing with sun spots, dark spots, uneven skin tone, fine lines, sagging, or general dullness - particularly those with normal or dry skin. If sun damage and hyperpigmentation are your primary concerns, this is the targeted solution. 

Key Benefits

• Fades Dark Spots and Sun Damage - 15% L-Ascorbic Acid reduces the visible signs of sun aging and hyperpigmentation for a more even, uniform complexion.
• Firms and Lifts - Vitamin C supports healthy collagen production and helps visibly improve skin density to lift and firm sagging skin over time.
• Smooths Fine Lines and Wrinkles - In a 12-week clinical study, 93% of participants showed measurable improvement in fine lines versus baseline.
• Brightens Dull Skin - The combination of Vitamin C and Lactic Acid accelerates cell turnover and clears surface dullness for visibly more radiant skin.
• Enhanced Antioxidant Absorption - Lactic Acid acts as a delivery enhancer, improving the penetration and performance of L-Ascorbic Acid and other antioxidants in the formula.
• Strengthens the Moisture Barrier - Key hydrating ingredients reinforce the skin's barrier to reduce moisture loss and improve overall skin resilience.
• Clinically Tested - In a 12-week clinical and consumer perception study, 68% saw a visible improvement in sun aging, 74% said skin looked stronger, and skin firmness visibly improved after 12 weeks (22 participants). 

Key Ingredients

• Vitamin C (Ascorbic Acid) at 15% - A high-potency form of L-Ascorbic Acid that visibly diminishes sun damage and dark spots, supports collagen synthesis, and brightens overall skin tone.
• Lactic Acid - Gently exfoliates the skin's surface and enhances the absorption and performance of antioxidants, including Vitamin C.
• Ferulic Acid - Stabilizes Vitamin C and Vitamin E, extending their efficacy and boosting antioxidant protection against environmental damage.
• Vitamin E (Tocopherol) - An antioxidant with sun-protective properties that works synergistically with Vitamin C to block free radicals and protect against oxidative stress.
• Licorice Root (Glycyrrhiza Glabra Root Extract) - Helps reduce the appearance of dark spots and uneven pigmentation for a more balanced skin tone.
• Mulberry Fruit (Morus Alba Fruit Extract) - Supports skin brightening and helps minimize the appearance of hyperpigmentation.
• Hyaluronic Acid (Sodium Hyaluronate) - Draws moisture into the skin to keep it hydrated and comfortable throughout treatment.
• Adenosine - Helps smooth the appearance of fine lines and wrinkles while supporting overall skin firmness.
• Glycolic Acid - Supports surface exfoliation and cell turnover to enhance the overall brightening effect of the formula. 

How To Use

Use once daily. Apply 4-6 drops as an all-over treatment onto clean, dry skin. Follow with your preferred moisturizer. Always apply SPF during daytime use. Note: a slight tingling sensation is normal until skin has adjusted to the formula.

Why MASC Recommends This

15% L-Ascorbic Acid is not a casual concentration - it's the level at which Vitamin C has been clinically shown to produce meaningful results on pigmentation, firmness, and sun damage. Most Vitamin C serums either underdose the active or use a less effective form of Vitamin C. This one does neither. The addition of Lactic Acid as a delivery enhancer is what separates it from a standard Vitamin C serum - it primes the skin to absorb and use the antioxidants more efficiently, which is why the 12-week results are as strong as they are. If sun damage and uneven tone are at the top of your list, this is a serious, well-formulated answer.