What is the correct order of hair layers from the inside out?

The correct order of hair layers from the inside out is indeed Medulla, Cortex, and Cuticle.

The medulla is the innermost layer of the hair shaft. It is a soft, spongy layer that may be absent in some hair types, particularly in finer, lighter hair. The medulla plays a less significant role compared to the other layers but can impact the overall structure and characteristics of the hair.

Next is the cortex, which makes up the majority of the hair's structure. This layer contains tightly packed cells and is responsible for the strength, color, and texture of the hair. The cortex is rich in keratin, the protein that gives hair its durability and flexibility.

The cuticle is the outermost layer, consisting of overlapping, flattened cells that protect the inner layers of the hair. The cuticle is essential for maintaining moisture and protecting the hair from damage. A healthy cuticle layer allows for smooth, shiny hair.

Understanding the structure of hair is crucial in electrolysis, as different layers can affect how hair reacts to the treatment. In this context, knowing the correct order of hair layers helps practitioners better assess hair characteristics and treatment needs.