NIC Esthetician Written ExamScientific ConceptsMedium
An esthetician is educating a client about the importance of antioxidants in skincare. Which of the following statements accurately describes the primary mechanism by which antioxidants protect the skin?
- AThey increase collagen production in the dermis.
- BThey exfoliate dead skin cells from the stratum corneum.
- CThey neutralize free radicals, preventing oxidative damage.
- DThey stimulate melanocyte activity to enhance UV protection.
Show answer & explanationAnswer & explanation
Correct answer: C. They neutralize free radicals, preventing oxidative damage.
Antioxidants work by donating an electron to unstable free radicals, thereby neutralizing them and preventing them from causing oxidative damage to skin cells, DNA, and collagen.
Why the other options are wrong
- A. While some antioxidants may indirectly support collagen, their primary mechanism is not direct collagen production increase.
- B. Exfoliation is typically done by alpha hydroxy acids (AHAs) or beta hydroxy acids (BHAs), not the primary role of antioxidants.
- D. Melanocytes produce melanin for UV protection; antioxidants do not directly stimulate this process.
Antioxidants
Molecules that inhibit the oxidation of other molecules, thereby protecting cells from damage caused by free radicals.
- Neutralize unstable free radicals
- Prevent oxidative stress and cellular damage
- Found in vitamins (C, E), polyphenols, carotenoids
- Protect against environmental aggressors like pollution and UV radiation
Memory trick: Antioxidants Attack Atoms, Avoiding Adverse Aging.