C-RADICAL Defense Antioxidant Serum

Multi-Award Winning Vitamin C Serum
A clinically-proven antioxidant serum formulated with a novel form of Vitamin C plus 14 vital antioxidants that help protect against environmental stressors while helping to conserve elastin.* Read full benefits

 

Size: 1.0 Fl. Oz. 29.6 mL

$199.00
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Benefits of C-RADICAL Defense

Benefits of C-RADICAL Defense

  • Formulated with a proprietary encapsulated novel form of Vitamin C (Sodium Ascorbate), which helps to defend against free radical damage while supporting the skin's ability to conserve elastin*.
  • Proven to help reduce the effects of free radicals in the skin by up to 74%*.
  • Helps brighten skin and reduce the appearance of fine lines, wrinkles, photodamage, and other signs of aging.
  • Works to help refine skin texture and reduce the appearance of redness and brown spots.
  • 15 proven antioxidants to help neutralize free radicals, protect against UV damage and other environmental stressors such as blue light and pollution.
  • Known to support the skin’s ability to stimulate collagen production, the main protein that provides support to the skin's structure and helps prevent sagging or wrinkling.
  • Ideal for most skin types.
  • Winner of New Beauty 2024 and 2025 "Best Vitamin C Serum" and 2024 Shape Skin Awards "Best Vitamin C Serum"
  • See why C-RADICAL Defense is a game changer for skin.


  • Non-Tacky
  • Non-Irritating
  • Scent-Free
  • Luxurious, Stable Formula

Key Ingredients

Sodium Ascorbate icon Sodium Ascorbate A novel form of vitamin C in an encapsulated delivery system: shown to have remarkable stability and absorbs 20x more effectively*.
Green Tea icon Green Tea Helps to scavenge reactive oxygen species (ROS) and helps to up-regulate antioxidant enzymes.
Physalis Angulata icon Physalis Angulata An anti-inflammatory that supports the skin’s ability to repair collagen and helps to enhance the combat against free radicals.

Visibly Improved Appearance of Facial Redness, Hyperpigmentation and Radiance

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Female age 46 ALASTIN Skincare® Regimen: C-Radical Defense Antioxidant Serum, gentle cleanser, Ultra Light Moisturizer, HydraTint SPF 36 Sunscreen and/or SilkSHIELD® SPF 30 Sunscreen; all products used twice daily with option to reapply moisturizer and sunscreen as needed. Imaging Equipment: VISIA Skin Analysis (Canfield Scientific Inc., Parsippany, NJ). Reference: Data on file at ALASTIN Skincare®. Individual results may vary. Photographs are unretouched. Photos courtesy of Dr. Moradi.

Visibly Improved Appearance of Texture, Tone and Radiance

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Female, age 56 ALASTIN Skincare® Regimen: C-Radical Defense Antioxidant Serum, gentle cleanser, Ultra Light Moisturizer, HydraTint SPF 36 Sunscreen and/or SilkSHIELD® SPF 30 Sunscreen; all products used twice daily with option to reapply moisturizer and sunscreen as needed.  Imaging Equipment: VISIA Skin Analysis (Canfield Scientific Inc., Parsippany, NJ). Reference: Data on file at ALASTIN Skincare®. Individual results may vary. Photographs are unretouched. Photos courtesy of Dr. Moradi.

Clinical Results

In a Clinical Study, C-RADICAL showed the following in as early as 8 weeks:

up to

71%
Reduction in the appearance of uneven skin texture.*
69%
Reduction in the appearance of redness.*
50%
Reduction in the appearance of fine lines*

How to Use C-RADICAL

How to Use C-RADICAL

  • In the morning and evening after cleansing, apply 1-2 pumps of serum to the face.
  • Avoid getting in the eyes. If contact occurs, rinse thoroughly with water.

Customer Reviews

Customer Reviews
4.5 Based on 178 Reviews
5 ★
61% 
109
4 ★
31% 
56
3 ★
5% 
9
2 ★
1% 
2
1 ★
1% 
2
Customer Photos
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D
04/22/2025
Dana SVG verified by SHOP
United States

Love this product!

D
04/17/2025
Donna SVG verified by SHOP
United States

I love the glow it gives but wish it was a larger size…

M
03/25/2025
misty SVG verified by SHOP
United States

This product is amazing.

M
12/05/2024
Maysoun SVG verified by SHOP
United States

My face never felt better!! Love love love Alastin products

B
11/11/2024
Bailey SVG verified by SHOP
United States

My derm recommended this over the skinceuticals vitamin c. This has a neutral color and no scent. I love how it applies and feel as though it works.

*Data on file at ALASTIN Skincare®. Individual results may vary.