What most people do is go by recommendation. This is the first step and a great way to see the results from someone who has already gone through the process.
Second, if an offer for treatment is too good to be true, it probably is. Non-invasive beauty treatments are a high-end product. The equipment is costly, the training has been an investment of time and money and some treatments can take hours to perform.
Third, be wary of cheap products used in the treatments. There are many brands out there, but we also have the power of the internet to investigate some of the products that you find on the aesthetician’s table. Don’t be shy to ask the names of the products and jot them down.