Skin Concerns · July 2, 2026 · 4 min · By Ezra Caulfield
Laser Hair Removal on Deeper Skin Tones: Why the 1064 nm Nd:YAG Became the Beverly Hills Default
Alexandrite lasers are faster and often cheaper per session, so why do experienced practices reach for Nd:YAG the moment a patient's skin type passes Fitzpatrick III? The answer is physics, not marketing.
Walk into any laser practice in Beverly Hills and you will likely find at least two hair removal wavelengths on the shelf: a 755 nm alexandrite and a 1064 nm Nd:YAG. Many devices now house both in a single platform. Which one gets fired at your follicles is not a stylistic choice. It is a calculation about where your melanin lives, and getting it wrong is the single most common cause of hair removal burns, blistering, and post-inflammatory hyperpigmentation.
The core problem: melanin is both the target and the bystander. Laser hair removal works by selective photothermolysis. The laser emits a wavelength that melanin absorbs preferentially, the pigment in the hair shaft and follicle converts that light to heat, and the heat damages the stem cells in the follicular bulge and bulb. The complication is that melanin also sits in your epidermis, the outermost layer of skin. In lighter skin, epidermal melanin is sparse, so most of the energy passes through and concentrates in the dark hair below. In Fitzpatrick types IV, V, and VI, the epidermis itself is loaded with melanin and competes for the laser energy. If the epidermis absorbs too much, you get a surface burn instead of a treated follicle. For an independent overview, see Laser hair removal: overview and what to expect.
Why wavelength matters. Melanin absorption is not flat across the spectrum. It is strongest in the ultraviolet and visible range and falls off steadily as wavelength increases. At 755 nm, the alexandrite wavelength, melanin absorption is high. That makes alexandrite extremely efficient at heating fine or lighter brown hair, but it also means a melanin-rich epidermis soaks up a dangerous fraction of each pulse. At 1064 nm, melanin absorption drops to roughly a quarter of what it is at 755 nm. The Nd:YAG beam also penetrates deeper, on the order of 4 to 6 millimeters, which matches the depth of terminal hair follicles in areas like the beard, back, and bikini line. The result is a wavelength that largely skips past epidermal pigment and deposits its energy where the follicle actually sits.
The trade-off nobody should hide from you. Because Nd:YAG interacts less with melanin overall, it interacts less with the melanin in the hair too. Practitioners compensate with higher fluences, meaning more energy per pulse, and longer pulse durations. This is why Nd:YAG treatments are frequently described as more uncomfortable than alexandrite sessions, and why robust skin cooling, whether contact cooling, cryogen spray, or forced chilled air, is non-negotiable. It is also why Nd:YAG struggles with fine, light, or vellus hair. If the hair does not contain enough pigment to act as a target, no safe fluence will destroy it. Patients with darker skin and fine facial hair are the hardest case in laser hair removal, and an honest consultation will say so.
What the evidence supports. Peer-reviewed comparisons consistently show that long-pulsed 1064 nm Nd:YAG achieves meaningful long-term hair reduction in skin types IV to VI with substantially lower rates of blistering and pigmentary change than shorter wavelengths at equivalent effectiveness. Diode lasers at 800 to 810 nm occupy a middle ground and can be used cautiously on type IV skin with long pulse widths and aggressive cooling, but most conservative protocols still shift to Nd:YAG at type V and above. Pulse duration matters as much as wavelength here: longer pulses, in the range of 30 milliseconds and up, allow the thin epidermis to shed heat between moments of energy delivery while the bulkier follicle continues to accumulate it.
Questions worth asking at a consultation. First, ask which wavelengths the practice actually operates, not which platform brand they advertise. A multi-wavelength platform is only useful if the operator switches settings for your skin type. Second, ask whether they perform a test spot on darker skin and wait 24 to 72 hours before treating a full area, since delayed pigmentary reactions do not show up immediately. Third, ask about their cooling method and what happens if you arrive with a recent tan, because a tan temporarily raises epidermal melanin and changes the safety math even for Nd:YAG. Reputable operators will postpone treatment rather than lower settings into ineffectiveness.
The bottom line. The 1064 nm Nd:YAG is not a premium upgrade or a marketing gimmick. It is the wavelength whose absorption profile makes hair removal on melanin-rich skin possible with an acceptable risk margin. It requires more sessions on average, typically six to eight versus four to six, tolerates fine hair poorly, and demands skilled parameter selection. But for Fitzpatrick IV to VI patients, the relevant comparison is not Nd:YAG versus alexandrite. It is Nd:YAG versus the burn and hyperpigmentation risk of using the wrong tool. In a city with as much device inventory as Beverly Hills, there is no reason to accept a practice that only stocks one answer.
Related reading: What Laser Hair Removal Costs in Beverly Hills.