What amount of heat = true reduction??

Hair Removal Methods Laser hair removal
#1

I read all over that to get true reduction its =40J and others say anything less than 20J is worthless.

What is the truth??

Thanks in advance

#2

There are too many other factors like pulse width, skin type and other things to make thee assumptions. What is true in one case wont come close in another.

#3

You can use a tiny spot size and treat using 150J and it will still not be as effective as 30J on on a 10x10 spot size.

As said above, your statement is kind of like which car is better, red or yellow.