Esthetics Core Written Practice Test

Free radicals are unstable molecules that are characterized by having unpaired electrons, which makes them highly reactive. This instability prompts free radicals to seek out and bond with other molecules to stabilize themselves. In this process, they can cause damage to cells, proteins, and DNA, potentially leading to oxidative stress, which is implicated in aging and various skin conditions.

The correct response accurately identifies the nature of free radicals and highlights their impact on the body. Understanding the role of free radicals is essential in the field of esthetics, as they are a significant concern for skincare and overall skin health.

The other choices describe elements unrelated to the true nature of free radicals. Stable molecules and antioxidants serve different functions and are generally protective against the damage free radicals cause, while natural oils are produced by the skin to maintain hydration and barrier function, rather than initiating damage.