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What is the Difference Between Alex and YAG Laser Hair Removal?

Explore the key differences between Alexandrite and YAG laser hair removal to make an informed choice for your skin type and hair needs.

Are you on the hunt for the perfect laser hair removal solution? If you've been caught up in the "Alexandrite vs ND YAG" debate, wondering which laser is the superstar for zapping away unwanted hair, you're definitely not alone. Let's dive into it and shed some light on these two popular choices, making your decision a whole lot easier.
Before we start, let's take a look at the science of laser hair removal.


How Lasers Work

Laser hair removal operates on the principle of selective photothermolysis. This sophisticated technique employs lasers to precisely target melanin in the hair follicles. The lasers emit a specific wavelength of light, meticulously calibrated to focus solely on the pigment within the follicles, thereby minimizing any impact on the surrounding skin.

Upon absorbing the laser's light, the melanin converts this energy into heat. This heat then travels to the root of the hair follicle, effectively disrupting its ability to regenerate hair. The precision of this process ensures both the efficacy and safety of the treatment, with different lasers like Alexandrite and ND YAG being tailored for varying skin tones and hair types, owing to their distinct wavelengths. 


Alexandrite Laser Hair Removal

The Alexandrite laser is a powerful tool for hair removal, particularly well-suited for those with lighter skin tones and fine hair. Its efficiency and speed make it a popular choice, although its suitability varies based on individual skin and hair characteristics.



The Alexandrite laser operates at a wavelength of 755 nanometers (nm), placing it in the near-infrared spectrum of light. This specific wavelength is meticulously chosen for its strong absorption by melanin, the pigment in hair. The 755 nm wavelength allows for effective targeting of the hair follicle while maintaining a balance between penetration depth and melanin absorption, making it particularly suitable for hair removal in lighter skin types.


Ideal Candidates:

People best suited for Alexandrite laser hair removal are those with light to medium skin tones, classified typically as Fitzpatrick skin types I, II, and III. This is due to the laser's wavelength which is highly absorbed by melanin. It is most effective for individuals with dark hair against a contrast of lighter skin, as the laser can easily differentiate between the pigment in the hair and the skin, reducing the risk of skin damage.


Pros of Alexandrite laser:

Speed and Efficiency: The Alexandrite laser is known for its rapid treatment capability. It can cover larger areas in a shorter amount of time compared to other lasers, making it a preferred choice for treating extensive areas like legs and back.
Effectiveness on Fine Hair: This laser type is highly effective in removing fine to medium coarse hair, often requiring fewer sessions to achieve the desired results.
Precision: The technology behind Alexandrite lasers allows for precise targeting of the hair follicle, minimizing the risk of collateral damage to the surrounding skin.



Skin Tone Restrictions: The primary limitation of the Alexandrite laser is its suitability for lighter skin tones. For individuals with darker skin, there is a heightened risk of skin damage due to the laser's high melanin absorption rate.
Reduced Effectiveness on Light Hair: While excellent for dark hair, its effectiveness diminishes when it comes to treating very light, red, or gray hair, due to the lack of sufficient pigment to absorb the laser light.
Potential for Skin Irritation: There is a risk of temporary side effects such as redness, swelling, and discomfort, particularly in individuals with sensitive skin.

hair removal screen

YAG Laser Hair Removal

The YAG laser offers a safe and effective solution for laser hair removal, particularly for those with darker skin tones and coarse, dark hair. Its unique wavelength allows it to safely treat skin types that might be at risk with other laser types.



YAG laser hair removal employs a wavelength of 1064 nanometers (nm), which falls in the infrared spectrum. This longer wavelength allows for deeper penetration into the skin compared to other lasers. The 1064 nm wavelength is less absorbed by melanin, making it safer for darker skin tones as it reduces the risk of affecting the surrounding epidermal melanin.


Ideal Candidates:

Darker Skin Tones: The YAG laser is particularly suited for individuals with darker skin tones, including those classified as Fitzpatrick skin types IV, V, and VI. Its ability to bypass the skin's melanin and target the hair follicle makes it a safer option for these skin types.
Coarse, Dark Hair: While effective on various hair types, the YAG laser is especially proficient in removing coarse, dark hair, which is more prevalent in individuals with darker skin.



Safety on Dark Skin: The most significant advantage of the YAG laser is its safety profile for darker skin tones. It minimizes the risk of hyperpigmentation and burns that are more common with other lasers on darker skin.
Deeper Penetration: Due to its longer wavelength, the YAG laser can penetrate deeper into the skin, effectively targeting hair follicles located further beneath the skin surface.
Versatility: The YAG laser can be used on all skin types, though it is particularly beneficial for darker skin.



Less Effective on Finer Hair: The YAG laser may not be as effective in treating finer, lighter hair compared to coarser, darker hair.
More Sessions Required: In some cases, individuals might need more treatment sessions with the YAG laser to achieve desired results, especially for finer hair.
Potential Discomfort: Some people report more discomfort with the YAG laser compared to other types of lasers due to its deep penetration.


Comparison between Yag and Alexandrite

The following table provides a clear comparison between the two lasers, emphasizing their suitability for different skin and hair types.



Alexandrite Laser

YAG Laser


755 nm

1064 nm

Skin Tone Suitability

Light to medium skin tones

Darker skin tones

Hair Type Effectiveness

Best for fine hair

Effective on coarse hair

Treatment Speed




Higher risk on dark skin

Safer for dark skin

Alexandrite vs ND YAG: Making the Right Choice

When it comes to laser hair removal, selecting the right laser type is a decision that requires careful consideration of several factors. The choice between Alexandrite and YAG lasers depends on understanding their distinct characteristics and how they align with your specific needs. Here are key considerations to help guide you in making an informed decision:


Understand Your Skin Type and Hair Color:

Skin Tone: The Fitzpatrick Skin Type Scale is a useful guide. Lighter skin types (I-III) often respond well to Alexandrite lasers, while darker skin types (IV-VI) are better suited for YAG lasers.
Hair Color and Texture: Darker and coarser hair typically responds better to laser treatment. Alexandrite lasers are more effective on fine to medium hair, whereas YAG lasers are suited for darker, coarser hair.


Consider Safety and Efficacy:

Safety: Evaluate the safety profile of each laser type for your skin tone. YAG lasers are generally safer for darker skin tones due to their lower melanin absorption.
Efficacy: Consider how effectively each laser type can achieve your desired results, based on your hair and skin characteristics.


Professional Consultation:

Seek advice from a qualified dermatologist or a trained laser hair removal technician. They can assess your individual case and advise on the most suitable laser option.
A professional can also inform you about the number of sessions needed, potential side effects, and post-treatment care.


Lifestyle Considerations:

Consider your tolerance for treatment duration and frequency. Alexandrite lasers may offer quicker sessions but might require more care with darker skin tones.
Evaluate your pain tolerance. Different laser types and settings can offer varying levels of discomfort.


Long-Term Results vs. Short-Term Convenience:

Weigh the importance of long-term hair reduction against the convenience of shorter, more frequent sessions.
Consider the long-term cost implications of the chosen laser type, as different lasers might require a varying number of sessions to achieve optimal results.



In conclusion, the journey towards smooth, hair-free skin is a personal one. Both these technologies offer distinct benefits, tailored to different skin types and hair characteristics. And the decision between Alexandrite and YAG lasers should be made with careful consideration and professional guidance. 

For clinics, we have two-in-one laser hair removal for both Alexandrite and YAG. 


Alexandrite 755nm & Long Pulsed 1064nm Nd:YAG Laser Hair Removal Device
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