I saw an episode of "Good Eats" that Alton Brown discussed this. He stated that an 8:1 ration of fresh - sea water could be used to extend water supplies as we

I saw an episode of "Good Eats" that Alton Brown discussed this. He stated that an 8:1 ration of fresh - sea water could be used to extend water supplies as well as make your body retain the water longer so less is needed vs pure water. I would be curious to know if this is a good ratio, should I ever become shipwrecked :)