What are examples of ingredients used in crystal microdermabrasion?

The choice of aluminum oxide, corundum, and salt as the correct answer reflects the common and effective ingredients used in crystal microdermabrasion treatments. Aluminum oxide is a prominent ingredient because of its crystalline structure, which provides effective exfoliation while being safe for skin use. Corundum, a mineral composed of aluminum oxide, is equally beneficial for its durability and ability to maintain its structure during the abrasion process, ensuring a consistent and effective treatment. Salt, on the other hand, serves as a natural exfoliant that can help in removing dead skin cells and promoting a smoother skin texture.

These ingredients are specifically chosen for their properties that facilitate the microdermabrasion procedure, which aims to improve skin texture, reduce signs of aging, and enhance overall skin appearance. The effectiveness and safety profile of these materials in professional and clinical settings make them preferred choices for practitioners in medical aesthetics.