Zeazanthin is in many eye supplements and is being studied by the NEI, National Eye Institute, as part of the AREDS-2 study looking at the benefits of Lutein, Zeazanthin and Omega 3 Fish Oils on AMD progression. The patients will be taking 20 milligrams a day of Zeazanthin. The United States and global safety organization have established an ADI (acceptable daily intake) of 2 mg/kg body weight/day of Zeazanthin. This equates to 155 mg per day for 177 pound person.