What is a key feature of advanced practice esthetic services?

The key feature of advanced practice esthetic services is the work performed on the epidermal layer of the skin. This is because advanced esthetic practices often involve techniques and treatments that target skin improvement and rejuvenation, which are primarily concerned with the outermost layer of skin, known as the epidermis.

These advanced services may include various treatments such as chemical peels, microdermabrasion, and other skin resurfacing techniques that seek to improve the skin's appearance, texture, and health. By focusing on the epidermal layer, estheticians can effectively address issues like dryness, pigmentation, and signs of aging.

In contrast, solely focusing on cosmetic nail services pertains to a different area of aesthetic practice that does not typically involve skin treatment. The application of permanent wave solutions is primarily related to hair, not skin. Lastly, while cleansing and massaging the body are important aspects of general esthetics and wellness, they do not specifically highlight the advanced techniques focused on improving the skin at a deeper level, which is the core of advanced practice esthetics.