Laser hair removal: 6 sessions to cut hair by 90%

Fair skin and dark hair: the only case where laser works

Laser hair removal does not remove hair. It reduces it. And it only truly reduces it if the patient meets a physical requirement that no clinic puts in its advertising: light skin, dark and coarse hair. Outside that scenario the treatment is expensive, slow and, in quite a few cases, outright useless. The promise of smooth, permanent skin sells six-session packages; the physics behind it sells something far less photogenic.

Why it takes six sessions to notice anything

The detail that dismantles the sales brochure is this: hair goes through three growth phases — anagen, catagen and telogen — and the laser only destroys the trinc when the hair is in the first one. That leaves out roughly two thirds of the treated area in each pass. About a third of the hair disappears, and not a single one more.

On top of that comes the clinics' safety criterion: the first sessions are fired at lower power than the skin could tolerate, so effectiveness never reaches 100% even in the most favourable case. At a pace of one session every two or three months, it takes three sessions to start seeing changes that last long term and about six to talk about a reduction of more than 90% of the hair. Anyone expecting results after the first appointment is throwing money away, and the full breakdown of phases, power levels and timelines circulating among people who have already paid out of their own pocket looks nothing like what you sign for at reception.

Pain depends on the area, not on the patient's tolerance

It hurts. The power test done before signing anything is applied with the device at low intensity, so the patient gets a misleading impression: once the treatment is paid for and the machine is turned up, the session is a different story. Pain is not evenly distributed either. There are areas where the sting is perfectly bearable and others — the groin is the one that always comes up in conversations — where every shot hits full force.

A home-made explanation circulates to justify the good results in certain profiles: if the skin is light it reflects heat instead of absorbing it, and the laser concentrates where it should, on the melanin in the hair. The idea matches the observation that dark hair is more firmly anchored than white hair, something anyone who has plucked grey hairs from a relative's head recognises immediately: white ones come out on their own, dark ones resist and pulling them hurts.

Dyeing your hair before the session is useless

It is one of the most widespread beliefs and one of the worst founded. Dye acts on the outer part of the hair, not on the inner area where the trinc sits, which is exactly where the laser needs to reach to have any effect. Added to the fact that the patient arrives shaved — or is shaved at the clinic itself — the manoeuvre delivers no results whatsoever.

The other big battleground is equipment quality. There is broad consensus that the sector has filled up with beauty salons that jumped on the laser bandwagon without the technology or the expertise to back it up. The recommendation repeated when hair is not blonde or light is to demand a machine with ENEKA PRO technology. If the hair is blonde, the conversation changes: there the margin of success narrows to almost nothing, because the laser needs pigment in the trinc to turn into heat and destroy it.

Laser hair removal works, but it works like a medical treatment with narrow indications, not as a universal beauty service. The sector will most likely keep selling permanent results to an audience that, in half the cases, is not a candidate to achieve them.