Somewhere in another forum here (don't remember which one) someone wrote about just soaking in seawater--I remember now, they had either Psoriasis
or eczema--and seeing a great improvement in the condition. There is a whole healing protocol involving seawater baths used in Europe called Thassa...something that I ran into when I was doing extended research on the uses of seawater. There was a mention of that somewhere on the Ocean Plasma site also. They have many spas set up for just that purpose, and one does absorb water and organic minerals through the skin.
According to the historical literature (from links on the Ocean Plasma site to the work of Rene Quinton and others) they originally injected seawater, but have found since then that it works just as well (I think) by drinking it, and that's the way its sold, although I saw that they do have plasma bags for IV, probably as a saline drip replacement. Of course, if they ever do human field trials for blood replacement in transfusion it will be administered by IV also. So, you could inject it but not me. I'm drinking it.
I live a few hours from the Pacific and had thought about the same thing, but I know its quite a process they go through to get it for consumption. They get it off the shores of Nova Scotia where the water is pure, then 35 miles out to sea and 90 feet deep to avoid contamination and depletion of the minerals by sea vegetation. Then it has to be tested for purity, filtered so you don't get inorganic sediment, and cold-purified...all done without any contact with metal. I don't know if I'd trust it to drink (one tablespoon at a time, and if you have high blood pressure or kidney problems, you dilute it with 2 parts spring water) close to the shore, but I'd certainly soak in it. Given the temperature, I'b be getting it in big plastic water bottles, and letting it warm to room temperature. Just don't heat it. Seawater has living qualities, all of which they haven't even been able to analyze completely, so you treat it like blood.
I was given 10 little bottles free and still have the empties. I've already offered to send a couple each to two different people. I'll do the some for you if you will trust a refill from a stranger, as soon as my personal order (6 liters) arrives. If so, send me a mailing address by email. Then I'll keep the last 4 little bottles for family and friends to try.