Well that's being done with acute toxicity case reports only, AFAIK. I would like to see some double blind, placebo controlled studies with sucrose, HFCS, and the assorted artificial sweeteners . We have fit volunteer populations in the service members of the U.S. Armed Forces who are not obese. Pay them a tax free bonus. Let's see who adds weight and only fat.
The population is diverse (nearly everyone). Why test on soldiers?