Although I have not run independent testing, the product's look, smell and taste is as it should be. Since the effects are long-term, it's hard to judge efficacy, but based on other products that I bought from this manufacturer, I trust that it will be as expected. I have to mention the quality of the sales service by Jenny, who was always very fast, professional, corteuous and knowledgeable, responding promptly to the many questions that I had, and accommodating the detailed specifications that I needed. I heartily recommend buying from this company.

Best supplier I've dealt with in China