What is the chromophore when using the Nd:YAG laser for hair removal?

The chromophore when using the Nd:YAG laser for hair removal is primarily melanin, located in the hair shaft and bulb. Melanin absorbs the laser's energy, converting it to heat, which effectively damages the hair follicle and inhibits future hair growth. The Nd:YAG laser is particularly effective for hair removal because its wavelength penetrates deeply into the skin and targets the melanin without causing excessive damage to surrounding tissues.

While other substances like oxygen in the skin, water in the epidermis, and hemoglobin in blood vessels can absorb laser energy, they are not the primary targets when it comes to hair removal. The selective targeting of melanin allows for effective treatment in various skin types and hair colors, making it the crucial component in the process of laser hair removal.