We are very selective with the retailers who sell our product. Very few retailers are authorized and can ensure authenticity of DS Laboratories products.
We do not recommend purchasing product on eBay unless its from our official account, DS Laboratories. We recommend the same thing for every channel but will have a list soon of authorize retailers.
If you want to be sure if a product you purchased from a third party website is authentic, please contact us at contact@dslaboratories.com.