Why Asians Should Choose Diode Laser for Hair Removal


Why Asians Should Choose Diode Laser for Hair Removal

Say goodbye to Alexandrite. It’s time to find a new option suitable for Asians’ skin tone and hair color.

Laser hair removal treatment has become very common for more than two decades. There is a wide spectrum of laser devices available in the market, such as diode laser (755nm/810nm/1064nm), Nd:YAG laser (1064 nm), Alexandrite laser (755 nm), and ruby laser (680 nm).

In the early phase, laser hair removal for darker skin tone used to cause complications such as thermal damage and hyperpigmentation. However, with diode laser technology nowadays, dark skin patients can enjoy safe and effective laser hair removal treatment.

How is Diode Laser Better at Asian Skin Hair Removal?

Research has it that the treatment result can be very different when applying diode laser or alexandrite laser toward darker skin type.

According to research in 2005, it shows that diode laser surpasses both alexandrite laser and ruby laser in hair removal. The research has recorded 171 female hirsutism patients in Fitzpatrick skin types II- IV and followed their treatment for 12 months. Concerning the hair reduction and re-growth, it is observed that diode laser achieves better results followed by alexandrite laser and ruby laser. Diode laser treatment comes with the least complication as well.

Another research in 2014 has compared 755nm Alexandrite laser with 810nm Diode laser for the efficacy and safety of hair removal treatment. It is indicated that 810nm diode laser is safer to treat darker skin without risk of epidermal burning. Diode laser is also proven to be more effective than alexandrite for darker skin.

How Does Laser Hair Removal Work?

Melanin has high absorption at the wavelength of 755nm and 810nm. When melanin in hair follicles absorbs laser beam, the hair follicle along with the stem cells attached to it are heated and destroyed. Therefore, it removes the unwanted body hair and prevents it from growing again.



When we conduct hair removal, it should only be the melanin in hair follicles that absorbs the laser energy but not the melanin in our skin; hence only the hair follicles would be destroyed but not the superficial skin getting burned. That’s why the wavelength of laser treatment would be important because it determines the melanin absorption.

Alexandrite Laser for Light-Color Skin

The Alexandrite laser of 755 wavelength is wildly used for its excellence in dealing with light skin hair removal (Fitzpatrick Scale I & II). However, it’s not ideal for all skin types. The key is all about epidermal melanin. Pale skin contains less melanin in the epidermis; hence 755nm wavelength of alexandrite laser can penetrate to heat the hair follicle yet without burning the superficial skin. But for darker skin with more melanin on the skin surface, it’s more likely to cause epidermal burning.

Safe Hair Removal for Asian Skin

Generally, all skin tones can receive good results using wavelength 810nm for hair removal treatment. We should also consider skin tone varieties. Asian is a geographical idea but actually contains a wide variety of ethnicities, from pale skin (Fitzpatrick I & II), medium skin (Fitzpatrick III & VI) to darker skin (Fitzpatrick V&VI and more).

The solution to all skin types is a combination of wavelengths and the contact cooling tip of the handpiece. Smedtrum has designed diode laser hair removal device with the option of the single wavelength (810nm) and trio wavelength (755nm+810nm+1064nm, 3 in 1). The right choice of wavelength and energy fluence ensures efficacy.

The cooling system provides a contact cooling temperature between -4℃~4℃ to protect the surface of the skin ensuring patients’ treatment safety.

How to Choose Wavelength of Diode Laser

● The Single (810nm)

■ 810nm is also known as the “Golden Standard Wavelength,” in which it is absorbed moderately by the melanin. Therefore, the 810nm wavelength diode laser is suitable for all skin types, and much safer for people with dark skin color, as well as ideal for arms, legs, cheeks and beard.

● The Trio (755nm+810nm+1064nm)

■ 755nm wavelength

highly absorbed by the melanin and specifically effective for light-colored thin hair and light skin tone (Fitzpatrick Skin type I, II, III). Also, the penetration is ideal for superficially embedded hair in areas such as the eyebrows and upper lip.

■ 810nm wavelength 

suitable and ideal for all skin phototypes and all kinds of hair.

■ 1064nm wavelength 

lower melanin absorption, ideal for dealing with dark and thick hair or with dark skin or tanned skin person (Fitzpatrick Skin type III-IV tanned, V and VI). Besides, the 1064nm wavelength has the deepest penetration which can target the follicular papilla and treat deeply embedded hair in areas such as the scalp, underarm and pubic areas.








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Mustafa, F. H., Jaafar, M. S., Ismail, A. H., & Mutter, K. N. (2014). Comparison of Alexandrite and Diode Lasers for Hair Removal in Dark and Medium Skin: Which is Better?. Journal of lasers in medical sciences, 5(4), 188–193.

Saleh, N., et al (2005). Comparative study between ruby, alexandrite and diode lasers in hirsutism. Egyptian Dermatology Online Journal. 1:1–10.

Knaggs, H. (2009). Skin aging handbook: Skin Aging in the Asian Population. New York: William Andrew Inc. Pages 177-201.

Post time: Jul-03-2020

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