jcrows is the only supplier i have vetted and its the real deal. i would not buy the 2% stuff. do your own diluting if you think its necessary. the 2% is only due to regulation of I2 by the dea and has no health benefit at all. like i said, one can do it themselves with distilled water. i am positive thats all he does to make it - 2 parts Lugols and 3 parts distilled water. viola