The Dink Drink has chosen to make available to their clients/athletes/patients the Designs for Sport brand of products, which are all NSF Certified for Sport. This is huge! It means that you can trust what you're taking. See below for their own words:
"NSF’s global Certified for Sport® program helps athletes, dieticians, coaches and consumers make safer decisions when choosing sports supplements. The Certified for Sport® certification is the only independent third-party certification program recognized by the United States Anti-Doping Agency (USADA), Major League Baseball, the National Hockey League and the Canadian Football League. Certified for Sport® is also recommended by the NFL, NBA, PGA, LPGA, CCES, CPSDA, iNADO, Ironman, NASCAR, Taylor Hooton Foundation and many other organizations seeking to mitigate the risks of contaminated dietary supplements."
From https://www.nsfsport.com/