Laser Hair Removal 101 (Part 2)

Laser Hair Removal 101 (Part 2)

What was once thought as impossible, virtually painless diode laser hair removal is now available. To avoid the pain associated with conventional lasers, the breakthrough technology called Super Hair Removal (SHR) uses low energy and rapid pulsing diode laser. Single pulsed lasers use high energy to be effective, and would require the use of numbing creams to ease the pain. The use of numbing creams can be harmful if applied over large areas. 

Epidermal cooling is also used to reduce pain and prevent skin damage. Cool gel is applied on area to be treated, and the chilled tip mechanism of the laser ensures the surface of skin stays cool and comfortable throughout the treatment. 

The number of sessions needed depends on the area of the body being treated. Notably, the face requires around 8 to 10 sessions to achieve desired results compared to 5 to 6 sessions for the legs. After that, 1 to 2 touch-up treatments every year maybe needed. Other factors to be considered are skin color, coarseness of hair, and gender. Coarse dark hair on light skin is easiest to treat. 

Hair grows in several phases: anagen, telogen, and catagen. Laser treatment works only on the currently active growing hair follicles, called the anagen phase. The hair population has only between 10 and 20% in anagen stage. Hence, several sessions are needed for effective long term result. Treatment sessions should be timed when inactive follicles are just starting to grow again.

Treatment intervals can be from 4 to 8 weeks depending on the area being treated. The face usually requires more frequent treatments at 4 weeks apart, whereas arms and legs require around 6 to 8 weeks. 

Painless diode laser hair removal on legs

The hairs may appear to grow faster after the treatment, but most of the treated hairs will shed in about 2 weeks or so. If you pull the treated hairs with tweezers, there will be no more resistance which means the follicles have been damaged. Subsequent sessions will have longer treatment intervals as hair becomes thinner and regrowth slows down. 

Once you have decided to have your laser hair removal, you should not pluck or wax at least one month prior to the treatment. That's because the laser targets the hairs' roots, which are temporarily removed by waxing or plucking. You should also avoid unnecessary sun exposure on areas to be treated for one month before and after treatment. Sun exposure increases the risk of complications during and after treatment. 

SkinStation offers the best value in laser hair removal with the painless SHR available in all its branches. Compared with a lifetime of shaving, waxing or plucking, SkinStation can save you both time and money. Check out the very affordable packages being offered.

______________________________________________________________________________________This was published in the June 19, 2012 issue of Manila Bulletin Lifestyle Section. The author is the CEO of SkinStation. He received the 2011 Outstanding Chemist Award from Professional Regulations Commission for his achievements in the field of cosmetic chemistry. He can be reached at fred.reyes@skinstation.ph.

Laser Hair Removal 101 (Part 1)

Laser Hair Removal 101 (Part 1)

Next to facial, laser hair removal is probably the most commonly performed cosmetic procedure in the Philippines, with underarm hair as the most unwanted. The basic principle behind laser hair removal is selective heating of melanin in the hair follicle, while keeping the rest of the skin unharmed. Dark objects absorb light, so laser energy can be absorbed by melanin in the hair and skin. Light skin and dark hair is an ideal combination, producing the best results, but new lasers are now able to target black hair in darker skin tones.

Many clinics still offer hair removal by intense pulsed light (IPL) and commonly but incorrectly promote this as "laser hair removal.” IPL devices use full light spectrum from xenon lamps, and are therefore technically not lasers.  Lasers use a single wavelength, leading to a more precise and effective targeting of hair follicle.

Laser hair removal has become popular because of its speed, safety, and effectiveness, although results will depend upon the choice of laser technology used. These lasers are characterized by their wavelength, measured in nanometers (nm).

Alexandrite (755 nm) is used only on pale skin and has the highest pain score. Nd:YAG (1064 nm) is the gold standard for olive (type IV) and dark (type V) skin. Diode (810 nm) laser is the gold standard for pale (type I) to medium (type III) skin, and has now been made safer and virtually painless with the new Super Hair Removal (SHR) technology. 

Diode laser is the best option for the typical Filipino skin, which has light brown (type III) to fair (type II) skin tone. Painless diode laser is available at all SkinStation branches.

Spot size, or the width of the laser beam, affects treatment. The width of the beam should be about four times as wide as the depth of the target. Usual spot size used is about the size of a fingertip (8-18 mm). Larger spot sizes help laser light penetrate deeper and make treatments more effective.

Lasers must have a range of pulse width or pulse duration of 5 to 100 milliseconds. Longer pulse widths are safer for darker skin, but shorter pulse widths are more effective. Pulse width must be matched with the right fluence or energy level (measured in Joules/cm2) necessary to disable the follicles. Fluence levels of 10 to 30 J/cm2 are typically used. Although a higher fluence level can be more effective, it can also mean more pain.

Laser energy can have cumulative effect when introduced repetitively in the same target area. Using this principle, it is now possible to avoid painful laser procedure with the use of low fluence (4-8 J/cm2) and high repetition rate (10 pulses per second). This is commonly referred to as Super Hair Removal (SHR). Diode lasers with this new technology are virtually painless and as effective, making SHR a popular alternative to waxing in Brazilian hair removal. (Part 2 will be published on June 19, 2012.)

______________________________________________________________________________________(Updated on February 21, 2013) This was published in the Lifestyle Section of Manila Bulletin on June 12, 2012. The author is the CEO of SkinStation. He received the 2011 Outstanding Chemist Award from Professional Regulations Commission for his achievements in the field of cosmetic chemistry. He can be reached at fred.reyes@skinstation.ph.