Dr. Alexander Landfield
Board-Certified Neurologist & Medical Director
Melanin is the pigment responsible for skin, hair, and eye color, and understanding its biology is essential for safe and effective aesthetic treatment, particularly across the diverse skin tones we serve at Rani Beauty Clinic in Renton, WA.
Melanin is produced by melanocytes, specialized cells located in the basal layer of the epidermis. All humans have approximately the same number of melanocytes regardless of skin color. The difference in skin tone results from the type, quantity, and distribution of melanin produced, not the number of melanin-producing cells.
Two main types of melanin exist in human skin. Eumelanin is the brown-black pigment that provides the most UV protection. Pheomelanin is the yellow-red pigment associated with fair skin, red hair, and freckles. The ratio of these types determines skin color and influences both UV susceptibility and the response to pigment-targeting treatments.
Melanin production is regulated by a complex cascade beginning with UV exposure. UV triggers melanocyte-stimulating hormone release, which activates melanocytes to produce melanin. The enzyme tyrosinase catalyzes the rate-limiting step in melanin synthesis, making it the primary target for topical brightening agents like vitamin C, kojic acid, and arbutin.
Post-inflammatory hyperpigmentation occurs when skin injury or inflammation triggers excess melanin production in the affected area. This response is protective but can leave visible dark marks that persist for months. Melanin-rich skin tones are more susceptible to PIH because their melanocytes are more reactive to stimulation.
This heightened melanocyte reactivity in darker skin tones creates specific treatment considerations. Any treatment that generates heat, inflammation, or trauma near melanocytes can trigger post-inflammatory hyperpigmentation. This is why wavelength selection, energy settings, and post-treatment care must be carefully calibrated for each skin tone.
At Rani Beauty Clinic, our technology selections, including PicoWay's photomechanical approach and the Candela GentleMax Pro Plus with Nd:YAG wavelength, are specifically chosen for their safety across the full spectrum of skin tones. Understanding melanin biology is not optional but fundamental to serving our diverse patient community.
