You might think a fondness for seaweed is a quintessentially Japanese thing, but the Irish have been eating and bathing in it since the 12th century. Thought to soften skin and improve circulation, Ireland was home to some 300 'seaweed spas' at the begging of the 20th century. The process was fairly straightforward: pour hot water onto a heaping pile of slimy seaweed and slide in for a healing soak.
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