i sadly was told because i am a blonde it wouldn't work properly for me
there's two different types, one where they put a needle into each hair folicle and zap it, and another where they use light laser light (the painless one).
The effectiveness is based on the contrast between your hair colour and your skin colour, ie, black hair with white skin would be effective. because im naturally blonde, there isnt enough contrast
if that makes sense
thats what i was told neway