bg123, are you kidding? Even RDA is similar to that. The maintenance dose would be at least 300 mcg, while in situations where you get a die-off and things start raining in your neck, you should double or even triple that.

http://en.wikipedia.org/wiki/Reference_Daily_Intake

The UL (tolerable upper intake level) is given at 2 mg per day, but I wouldn't take more than 1 mg, if done over a longer time period. But this is 20 times more than you suggested.