Many people experience relief after only 3-5 treatments and depending on the severity of the injury, tissue repair can take up to 12-15 visits.
Yes, Cold Laser was discovered in 1967 and has been used for over 40 years with no documented serious adverse effects.
There are over 6,000 studies listed on PubMed which includes over 300 clinical trials, plus a new study is added almost every day.