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15% Vitamin C + PHA Serum

15% Vitamin C + PHA Serum

A potent brightening face serum powered by pure 15% Vitamin C (L-Ascorbic Acid) clinically proven to target the look of dark spots, fine lines & wrinkles and other signs of photoaging for skin that appears dramatically brighter, more even and youthful.

Size: 15 mL / 0.5 FL OZ

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There are a lot of Vitamin C serums, but we’ve created a new gold standard. Our unique powerhouse formula features four potent antioxidants (Vitamin C, Polyhydroxy Acid, Feverfew and Green Tea Extract) in every drop for brighter, more radiant skin in just one week!

Immediately after applying this lightweight and easy-to-absorb formula, your skin will appear glowing and refreshed. After just one week, skin will appear brighter and more radiant. After just four weeks, fine lines & wrinkles are less apparent and skin begins to look less stressed. When used consistently after 12 weeks, skin will appear dramatically brighter, more even and youthful.* This is for anyone seeking Vitamin C in a formula packed with antioxidants to diminish the signs of aging skin. You’ll “C” the visible difference in your skin in no time.

Why It Works: The star ingredient is 15% Pure Vitamin C (L-Ascorbic Acid), a powerful skin brightener, selected for its effectiveness over Vitamin C derivatives featured in many Vitamin C serums. Our pure Vitamin C is uniquely paired with Polyhydroxy Acid (PHA)which gently exfoliates the skin’s surface to allow the Pure Vitamin C to absorb into fresh, renewed surface layers of skin.

  • Fragrance-Free
  • Dermatologist & Allergy Tested
  • Paraben-Free
  • Clinically-Tested


Key Ingredients


Brightens appearance of skin discolorations to reveal a natural, radiant complexion. Helps visibly fade dark spots and dark patches.


Gently exfoliates skin surface, including the look of dark spots, for a more even tone and texture. Sloughs off surface skin cells so Vitamin C can absorb into fresh, renewed surface layers.


Gentle botanical antioxidant supports protection against drying environmental aggressors.


Boosts Vitamin C antioxidant capacity.

How To Apply

Apply to clean, dry face, neck and décolletage every morning, and follow with a NEOSTRATA moisturizer.

Storage: Store upright in a cool, dark place and open with care as contents may be under pressure. Product color may change over time but remains effective.

Pro Tip: Use an SPF face cream every day - even when it's cloudy outside - to help fend off dark spots and uneven skin tone. For best results, choose a broad spectrum SPF of 30 or above and reapply sunscreen at least every 2 hours, more frequently for fairer skin types.

Complement your daily brightening regimen by adding Illuminating Serum in the evening. This multi-action face serum featuring Niacinamide and NeoGlucosamine helps target and visibly fade dark spots while diminishing uneven skin tone. 15% Vitamin C + PHA Serum and Illuminating Serum are our go-to power duo for brighter, more radiant looking skin.

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Real Results

After 12 weeks of once-daily use
After 12 weeks of once-daily use


agreed overall appearance of skin improved


agreed skin is rejuvenated


agreed skin discoloration is diminished

Percentage of participants noting improvement with once daily use.

The Science of Our Formula

The Neostrata Difference


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C E Ferulic with 15% L-Ascorbic Acid

Vitamin C
15%+ Vitamin C
Formulated w/ PHA
Posted Before & After Images
Improves Appearance of Fine Lines & Wrinkles
Visibly Brightens Complexion
Targets Look of More Even Skin Tone
Fades Appearance of Dark Spots


How do I use 15% Vitamin C + PHA Serum?

Apply 2 drops of the serum to a clean, dry face, neck and décolletage every morning, and follow with a NEOSTRATA moisturizer. For best results, use underneath an SPF 30 moisturizer all year round to help fend off new dark spots and uneven skin tone.

When do I use 15% Vitamin C + PHA Serum?

You should use 15% Vitamin C + PHA Serum in the morning, right after cleansing.

What will Vitamin C do for my skin?

Vitamin C is a powerful antioxidant and brightening skincare ingredient. Vitamin C benefits for skin include helping to prevent and improve the appearance of UV-induced photodamage, reducing the look of skin discoloration and wrinkles and protecting against environmental aggressors. Learn more about Vitamin C Benefits for skin.