Salt therapy, or halotherapy, is a wellness trend claimed to have many breathing benefits. Doctors weigh ... Spa in Wong Chuk Hang features a calming Himalayan salt room with natural salt bricks.

It might look pretty, but a pinch of this stuff will cost you. 100 grams of pink Himalayan salt can cost $5 to $8, up to 20 times more than generic table salt. Ouch. But why is it so expensive?

This past year, the city has gained contrast therapy studios, viral head spas, and now a spa dedicated to salt therapy. How it works: Salt therapy, or halotherapy, involves inhaling microscopic ...