Alastin - C Radical Defense Serum

Alastin C Radical Defense Serum is a daytime antioxidant serum built around a next-generation, oil-soluble form of vitamin C combined with 14 additional antioxidants. It is designed for people who want the protective benefits of a vitamin C serum without the low pH, the sting, and the rapid oxidation that come with traditional L-ascorbic acid formulas.

Beyond free radical defense, the formula is designed to help conserve elastin, the protein responsible for skin's ability to spring back. Elastin is not readily replaced once it degrades, so protecting what you have is a meaningful long-term strategy alongside collagen support.

The texture is light and silky rather than tacky, it does not pill under sunscreen or makeup, and it suits all skin types including sensitive and reactive skin. Use it in the morning under your SPF as the antioxidant layer of a daily protection routine.

1. Cleanse and pat your skin dry.
2. In the morning, apply 1 to 2 pumps to your face, neck, and chest.
3. Smooth in evenly and let it absorb for 30 to 60 seconds.
4. Follow with your moisturizer, then a broad spectrum sunscreen.
5. Use once daily in the morning. It layers well over Regenerating Skin Nectar if you use both.

Store away from heat and direct light. The formula is more stable than traditional vitamin C serums, but antioxidants still last longest when kept cool and closed.

THD Ascorbate (next-generation Vitamin C): an oil-soluble, pH-neutral vitamin C derivative that penetrates well, does not sting, and stays stable far longer than L-ascorbic acid.

14-Antioxidant Complex: a layered blend that neutralizes different types of free radicals, giving broader coverage than any single antioxidant.

Elastin-Conserving Peptides: help protect existing elastin fibers from enzymatic breakdown, supporting the skin's natural recoil.

Vitamin E and Ferulic Acid: work synergistically with vitamin C to extend and amplify photoprotection.

• Helps reduce the effects of free radicals in the skin.
• Helps brighten skin and soften the appearance of fine lines, wrinkles, and photodamage.
• Helps refine skin texture and reduce the look of redness and brown spots.
• Supports the skin's natural collagen production.
• Helps conserve existing elastin, which the body does not readily replace.
• Non-stinging and pH-neutral, so it suits sensitive and reactive skin.
• Layers cleanly under sunscreen and makeup without pilling.

Not everyone tolerates a traditional L-ascorbic acid serum. The low pH that keeps pure vitamin C active is the same thing that makes it sting on sensitive skin, and it is why so many bottles turn brown before they are finished. C Radical Defense solves both problems by using a stable, oil-soluble derivative instead.

Our providers suggest it most often for patients with rosacea-prone or reactive skin, for anyone who has tried and abandoned a vitamin C serum because of irritation, and for patients focused on elastin preservation rather than pigment alone. If your skin tolerates it well and pigment is your priority, a low-pH formula such as SkinCeuticals C E Ferulic may still give you a slightly stronger brightening effect.

Antioxidants supplement sun protection rather than replace it, so continue using broad spectrum SPF daily. No consultation is needed to buy it. If you would like help deciding where it fits your routine, our team is on (650) 508-6565.