Alexandrite Laser vs Nd:YAG: Which Is Right for Your Practice?

Laser hair removal is one of the most in-demand treatments in aesthetic practice, but the right wavelength is not the same for every patient. Alexandrite (755 nm) and Nd:YAG (1064 nm) lasers each work differently, and which one you choose depends on skin type and condition treated. Getting that decision right is what lets your practice say yes to every patient who walks in.

Both wavelengths have decades of published clinical data behind them. Understanding where one outperforms the other is what separates a treatment plan that works for some patients from one that works for all of them.

What Is the Alexandrite Laser?

The alexandrite laser is a solid-state laser that operates at a wavelength of 755 nm, in the visible red spectrum. In aesthetic practice, it is best known for alexandrite laser hair removal, and for good reason. As published research confirms, melanin in the hair follicle has strong selective absorption at 755 nm, which ensures depth of treatment while minimizing vascular side effects. This makes it highly reliable at disrupting follicles in patients with lighter skin tones.

The trade-off is that the same strong melanin targeting becomes more risky in patients with more skin pigment. As Journal of Drugs in Dermatology research notes, darker-skinned patients carry a greater risk of epidermal melanin damage from shorter wavelength lasers, and are generally optimally treated with a 1064 nm wavelength. In Fitzpatrick Skin Types IV and above, the risk of pigmentation changes or surface irritation increases when alexandrite laser parameters are not carefully managed.

What Is the Nd:YAG Laser?

The Nd:YAG laser operates at a 1064 nm wavelength, in the near-infrared spectrum. Unlike alexandrite's 755 nm, which targets more superficial pigment, Nd:YAG penetrates deeper into the dermis and interacts less with surface melanin. Research published in the Journal of Drugs in Dermatology confirms that longer wavelengths transmit light energy deeper into the skin, with less absorption by epidermal melanin, making 1064 nm light more suitable for reaching the hair follicle in darker skin without disrupting the surface.

This makes it the preferred option for patients with Fitzpatrick types IV through VI, where melanin concentration in the skin is higher. Key clinical characteristics of Nd:YAG include:

• Deeper follicular reach, suited for coarser hair in areas like the beard and bikini
• Lower risk of pigment disruption in darker skin tones
• Broader indication range (compared to 755 nm) across vascular lesions, diffuse redness, wrinkles, and skin rejuvenation*

Research supports this. A peer-reviewed randomized trial with 18 months of follow-up found comparable long-term hair reduction results between both wavelengths when each was matched to the appropriate skin type. The takeaway: either wavelength can deliver durable outcomes. Nd:YAG simply does it through a route that carries less risk for patients with more skin pigment.

Alexandrite Laser vs Nd:YAG: Which Wavelength Benefits Your Patients?

Matching wavelength to skin type is the most important clinical decision in laser hair removal. StatPearls (NCBI) notes that patients with lighter skin and darker hair achieve the best outcomes precisely because the lack of epidermal melanin allows laser energy to concentrate in the follicle. The Fitzpatrick skin type scale is the standard reference point, but what matters most is what each choice means for patient safety and results.

At the type IV boundary, individual assessment matters. Hair coarseness, treatment area, and recent sun exposure all factor into the final call. This is precisely why many practices benefit from having access to both wavelengths.

Why Offering Both Wavelengths Grows Your Practice

Single-wavelength systems allow treatment of selective patient groups, making them a practical fit for practices with a defined patient demographic. For practices with a predominantly lighter skin patient base, the 755 nm alexandrite laser is the ideal choice. For practices serving patients with darker skin tones or a more diverse skin type mix, the 1064 nm Nd:YAG is well suited to meet those needs. Practices looking to treat every skin type that walks through the door benefit most from a dual-wavelength system.

Beyond hair removal, both wavelengths cover indications that build your service menu without adding separate devices:

• Alexandrite: benign pigmented and vascular lesions
• Nd:YAG: vascular lesions, spider veins, telangiectasias, facial redness, cherry angiomas, and non-ablative skin rejuvenation*
• Both: wrinkle treatment through non-ablative collagen stimulation

From a practice growth standpoint, this breadth means:

• A broader patient base across all Fitzpatrick Skin Types, including patients with darker complexions who have historically been underserved
• More return visits through expanded treatment options

The global laser hair removal market reached USD 1.13 billion in 2023 and is projected to surpass USD 5.16 billion by 2032, growing at a CAGR of over 18%. Practices that can treat every skin type are well positioned to capture that demand.

What Makes Gentle Pro^™ Lasers the Right Choice for Hair Removal?

Gentle Pro Series lasers from Candela offer single and dual-wavelength system options, allowing your practice to treat hair removal and beyond.

The laser series includes four configurations to match different practice needs:

• GentleLase Pro^®: 755 nm alexandrite laser; a strong starting point for practices focused on lighter skin types
• GentleYag Pro^®: 1064 nm Nd:YAG; purpose-built for darker skin tones and vascular indications
• GentleMax Pro^®: dual wavelength (755 nm and 1064 nm); the world's leading brand in laser hair removal, treating all skin types across a full range of indications
• GentleMax Pro Plus^®: dual wavelength (755 nm and 1064 nm); the premier system in the series, with the widest spot size range (1.5 to 26 mm), highest power, and the shortest pulse durations (2 ms) for fine hair treatment - and the exclusive GLX^™ Delivery System for the fastest treatments yet

The GLX Delivery System, available exclusively on GentleMax Pro Plus, delivers up to 21% faster treatment time and up to 81% faster treatment workflow compared to GentleMax Pro treatments. The single GLX applicator covers the full range of common laser hair removal spot sizes from 12 to 26 mm, removing the need for applicator changes mid-session.

Every system in the Gentle Pro family features both air cooling or Dynamic Cooling Device (DCD^®) options. DCD delivers a precisely timed cryogen burst with each laser pulse. It automatically scales with treatment parameters, protecting the epidermis consistently without manual adjustment.

Gentle Pro devices are FDA-cleared across a wide range of indications, including hair removal, benign pigmented lesions, vascular lesions, spider and leg veins, wrinkles, diffuse redness, port wine stains, pseudofolliculitis barbae, and onychomycosis. With over 25 years of clinical use, 20,000 devices installed, and a presence in 89 countries, Gentle devices are among the most widely adopted systems in medical aesthetics worldwide.

Contact a Candela product expert to find the right Gentle Pro configuration for your practice.

Now Is the Time to Serve Every Patient Who Walks In

Alexandrite and Nd:YAG are not competing technologies. They are complementary. Alexandrite delivers precision and speed for lighter skin types. Nd:YAG provides depth and versatility for darker skin types. Each wavelength and device option provides a unique opportunity to treat multiple conditions across targeted or broader patient groups.

If you want to see how the Gentle Pro series works in practice, Candela's team can walk you through it.

Frequently Asked Questions

Is alexandrite or Nd:YAG better for laser hair removal?
Neither is universally better. The right choice depends on the patient's skin type. Alexandrite is the stronger option for Fitzpatrick types I through III. Nd:YAG is a a reliable choice for all skin types and is ideal for types IV through VI. Many practices use both wavelengths to cover their full patient base.

What is the alexandrite laser wavelength?
The alexandrite laser operates at 755 nm. This wavelength is strongly absorbed by melanin, which makes it well-suited for hair removal and superficial pigmented lesions in patients with lighter skin tones.

How many sessions does laser hair removal take?
According to StatPearls (NCBI), a minimum of 4 to 6 sessions spaced 4 to 6 weeks apart are needed to achieve adequate results, with most patients requiring up to 6 to 8 treatments for optimal hair reduction depending on body area. The exact number depends on hair color, thickness, treatment area, and skin type. Clear expectations set at the initial consultation lead to better patient satisfaction regardless of wavelength.

What is the difference between GentleMax Pro and GentleMax Pro Plus?
Each Gentle platform has unique characteristics and specifications. Both of these lasers offer dual 755 nm and 1064 nm wavelengths. The GentleMax Pro Plus is our latest device, with the widest range of spot sizes (up to 26 mm), higher energy, and the shortest pulse duration (2 ms) for treatment of fine hair. The GentleMax Pro Plus also features the GLX Delivery System for up to 21% faster treatment time and up to 81% faster workflow compared to GentleMax Pro. The GentleMax Pro Plus is designed for high-volume practices that need the most power, speed, and clinical range in one system.