After six weeks I definitely see vast improvement. Oreo is 25+ years old male cat and has serious bleeding bladder issues. I was reticent to allow the vet to put him under anesthesia again so she suggested the light. As a desperate skeptic I started his treatments daily. I observed improvement immediately but it was minor. Week by week I saw more improvement. He has not demonstrated any bloody issues for almost a month.A huge victory. Upon the vets recommendation we have also changed his diet; however he has rejected the prescription diet and getting him to eat non-inflammatory food and supplements is a daily challenge. I must confess that I was curious so I tried it on myself and it seems to give as much relief as my CBD cream does with absolutely no discomfort.