I purchased this product to help with circulation in my legs. I run regularly but have noticed varicose veins behind my knees and decided to try this product. I have actually started to experience a lot of pain in my right knee that has a previous injury (ACL reconstruction 13 yrs ago) but I do not think it has anything to do with the supplement. I have been using this product now for about a month and nothing really stands out as a wow factor in regards to health improvements I can see or feel. The company that I ordered from shipped the product quickly and I was very satisfied with their service. I will update this post after I finish the bottle.