my dog has been unhealthy lately. I bought this product to make him feel a little healthier. overall we had a positive experience. but I think we need to use it for a while to see the results. our first impressions were nice. When I read the comments on the internet, not much good things are said. but I disagree. I got a quick response from the emails I threw to the manufacturer firm on the issues attached to my mind. I advise.