Free Radical Scavenger
Free Radical Scavenger — a molecule that neutralizes unstable, reactive compounds called free radicals before they can damage skin cells and structural proteins. In skincare, these are typically antioxidants that donate electrons to stabilize reactive species generated by UV exposure, pollution, and normal metabolism.
Key points
- Free radicals are unstable molecules that can damage lipids, proteins, and DNA in skin through a process called oxidative stress.
- Common topical scavengers include vitamin C, vitamin E, niacinamide, and various plant-derived polyphenols.
- Antioxidants work by donating electrons to reactive species, stopping the chain reactions that lead to cellular damage.
- Combining complementary antioxidants can provide broader and more stable protection than a single ingredient alone.
Frequently asked
How is a free radical scavenger different from an antioxidant?
The terms are used interchangeably in skincare; a free radical scavenger is simply an antioxidant that neutralizes reactive molecules to reduce oxidative stress.
Can antioxidants replace sunscreen?
No, antioxidants complement sunscreen by reducing free radical damage, but they do not block UV rays and should be used alongside a broad-spectrum SPF.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
