Alastin C-Radical Defense Antioxidant 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.

Ingredients

Full ingredient list
Water/Aqua/Eau, Caprylic/Capric Triglyceride, Glycerin, Sodium Acrylates Copolymer, Squalane, Sodium Ascorbate, Ubiquinone, Ectoin, Physalis Angulata Extract, Betaine, Phosphatidylcholine, Camellia Sinensis Leaf Extract, Carnosine, Centella Asiatica Extract, Olea Europaea (Olive) Leaf Extract, Zingiber Officinale (Ginger) Root Extract, Ergothioneine, Dunaliella Salina Extract, Punica Granatum Fruit Extract, Bisabolol, Lactoferrin, Tremella Fuciformis Sporocarp Extract, Polyglyceryl-10 Laurate, Cetyl Alcohol, Sodium Benzoate, Xanthan Gum, Tocopherol, Helianthus Annuus (Sunflower) Seed Oil, Propanediol, Tocopheryl Acetate, Caprylyl Glycol, Mannitol, Lecithin, Phenoxyethanol, C12-15 Alkyl Benzoate, Ethylhexylglycerin, Caprylhydroxamic Acid, Citric Acid, Potassium Sorbate

Best for

Alastin C-Radical Defense Antioxidant Serum is best for: All skin types

How to use

Twice daily — morning and night after cleansing — dispense one to two pumps and smooth the serum over the face.

Clinical Results

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

Product Images

Alastin C-Radical Defense Antioxidant SerumAlastin C-Radical Defense Antioxidant SerumAlastin C-Radical Defense Antioxidant SerumAlastin C-Radical Defense Antioxidant SerumAlastin C-Radical Defense Antioxidant SerumAlastin C-Radical Defense Antioxidant SerumAlastin C-Radical Defense Antioxidant Serum

Before & After

Before 1 After 1
Before 2 After 2

Reviews

4.6 ★★★★★ 239 reviews · as of August 2026
What Alastin customers report
  • The vitamin C that doesn't sting — sensitive-skin converts
  • Longtime SkinCeuticals users trialing — and often staying
  • Weightless, non-tacky, layers with anything
  • Brightening with dark-spot help

Reviews from Alastin, not BelleSkin customers.

Complete the routine

This item + 2 more
This item Alastin C-Radical Defense Antioxidant Serum Alastin Skincare Alastin C-Radical Defense Antioxidant Serum $218.00 Alastin Skincare Hydratint Pro Mineral Sunscreen SPF 36 Alastin Skincare Alastin Skincare Hydratint Pro Mineral Sunscreen SPF 36 $97.00 Alastin Restorative Skin Complex with TriHex Technology® Alastin Skincare Alastin Restorative Skin Complex with TriHex Technology® $298.00
Total $613.00

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Alastin C-Radical Defense Antioxidant Serum
$218.00