the fda sending out warning letters about those two items and to other mob ewe faketures of dmaa.gh this depending on how the fda rules: but they say they have 8,000 different items at the vitamin shop and do not expect significant pose poe sure. >> all right. taverns so much for that. our next guest lurchiaunches a e-book with some interesting angles. >> three basic buckets of topics. valuati valuation on facebook. let's kick it off with valuation. e you hearted the concerns emerging. >> we buput together this calculator. you can put all the inputs in there and you can come up, if you believe that this is like google was, you can sort of put in the growth trajectory, put in the e-bit margins of about 33%. apply a 15% discount rate and you come up with about 30 bucks a share. so, really, the only way you can justify, fundamentally on the number, and with human assumptionin assumptionings would be something a long those lines. the idea of smart book users accessing facebook and that is growing: at the same time, we've banged a lot about the government's issues. maybe investors don'