They are, but it takes years to get from "tested on mice" to "safe for humans". http://www.pbs.org/wgbh/nova/sciencenow/0403/03.html http://www.pbs.org/wgbh/no

They are, but it takes years to get from "tested on mice" to "safe for humans". http://www.pbs.org/wgbh/nova/sciencenow/0403/03.html http://www.pbs.org/wgbh/nova/sciencenow/0403/03.html http://www.msnbc.msn.com/id/25949447/#slice-2 http://www.msnbc.msn.com/id/25949447/#slice-2 When it does happen though, I think it'll be a massive breakthrough for public health. There are tons of diseases whose prevalence would be slashed just by raising the fitness level of the general population.