Understanding the hair growth cycle and the science behind laser hair removal

Understanding the hair growth cycle and the science behind laser hair removal

The hair growth cycle consists of three main phases: anagen, catagen, and telogen.

During laser hair removal, the laser targets the hair follicles in the anagen phase of the hair growth cycle, as this is when the hair is actively growing and contains the most melanin.

When the hair follicle is damaged by the heat from the laser, it may enter the catagen or telogen phase prematurely, which delays or prevents future hair growth.

Not all hair follicles are in the anagen phase at the same time, which is why multiple sessions of laser hair removal are needed. By spacing out the sessions over several weeks or months, it allows time for hair follicles to transition into the anagen phase, making them more susceptible to the laser.

It's important to note that laser hair removal does not permanently remove hair, but rather can provide long-term reduction of hair growth. Some hair follicles may be resistant to the treatment or may regrow after treatment, which is why maintenance sessions may be necessary to maintain the desired results.