Going back to the article You mentionend and quoting from the abstract:
(v) today there is no evidence for a complete and persistent hair removal
efficacy,
which makes a conclusion of
… evidence from controlled clinical trials favours the use of
lasers and light sources …
hard to follow, isn’t it? BTW: an older study of the same group (2001, i think) summarazies the situation similarly but comes to a far more skeptical (realistic?) conclusion regarding the superiority of photoepilation.
Back to permanency of results: afaik, there do exist a few studies on long term results of photoepilation (they seem to me more or less completly referenced in hairtell), and the result was fairly consistent:
- partial epilation to a high degree is possible with light sources.
- long term results show a moderate degree of regrowth.
- permanent full clearance cannot be obtained, but the results may be satisfactory.
Of couse these results are restricted to those situations where photoepilation may be appropriate. And that’s the key point:
photoepilation is suitable for permanent reduction of hair under certain circumstances; attempts to widen the applicability of the approach more or less failed (ok, using chomophores might help to treat medium blonde hair which otherwise would not be treatable any more). The result remains partial; at least there always exists a point where a switch to electrolysis is more economic.
Despite some studies there are several personal success stories - my own is both: success on the chest an breast (for about 4 years) and gross failure in the face. I have seen several results of partial facial clearance by photoepiliation which are stable for years - among my customers who want to have cleared the rest by electrolysis.
So my personal conclusion is that photoepilation may be successful if you keep in mind pretty narrow conditions of applicability of the approach. Speaking of the situation here in Germany, there is much more promised than hold, even or maybe especially by dermatologists (whooften don’t mind to treat blonde or white hair with their Nd:YAG lasers and charge a lot of maoney for that).
Beate